308.6 m the maximum height reached.
Define velocity
The main determinant of an object's location and rate of motion is its velocity. It can be explained as the distance an object travels in one measure of time. The displacement of the item in a given amount of time is referred to as velocity.
The distance a person travels in a predetermined amount of time is referred to as speed.
Vi is the starting speed.
Vf is final speed
A=acceleration and Y=displacement
When the bag is freed, its Vi equals that of a balloon traveling at 13 m/s upward.
At the moment of release, choose up as positive y=0.
Vf=0 when it is maximum. Using the equation 2Vf=2Vi+2ay,
0=(13m/s)2+2(9.81m/s2)y, and y=8.6m
300 + 8.6 = 308.6 m is the highest point.
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URGENT!!! BRAINLIEST WILL BE PICKED IF POSSIBLE!!!
Rory is on a seesaw. He is at the highest point, and his partner is at the lowest point. The angle of the seesaw is 29.7° above horizontal, Rory is 2.11 m from the fulcrum, and he has a mass of 35.4 kg. What is the torque that Rory is exerting on the seesaw?
636 Nm
363 Nm
64.9 Nm
37.0 Nm
According to the question the torque that Rory is exerting on the seesaw is 636 Nm.
What is torque?Torque is a type of rotational force or moment that can be applied to an object. It is typically measured in units of Newton meters (Nm). Torque is the rotational equivalent of linear force, and it is calculated by multiplying the force applied by the distance from the pivot point. When a torque is applied to an object, it causes the object to rotate about a pivot point. Torque can be used to perform work such as turning a bolt or lifting an object.
The torque (τ) exerted by Rory on the seesaw is equal to the mass of Rory (m) multiplied by the distance from the fulcrum (d) times the sine of the angle of the seesaw (θ):
τ = m x d x sin θ
Therefore, in this case, the torque that Rory is exerting on the seesaw is:
τ = 35.4 kg x 2.11 m x sin(29.7°) = 636 Nm
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Which statement best describes the conditions created by El Niño?
Responses
Winds that normally blow to the east slacken, waters off the coast of North America warm up, and upwelling decreases, reducing the nutrients in the water.
Winds that normally blow to the east slacken, waters off the coast of North America warm up, and upwelling decreases, reducing the nutrients in the water.
Winds that normally blow to the west slacken, waters off the coast of South America warm up, and upwelling decreases, reducing the nutrients in the water.
Winds that normally blow to the west slacken, waters off the coast of South America warm up, and upwelling decreases, reducing the nutrients in the water.
Winds that normally blow to the west get stronger, waters off the coast of South America cool down, and upwelling increases, improving the nutrients in the water.
Winds that normally blow to the west get stronger, waters off the coast of South America cool down, and upwelling increases, improving the nutrients in the water.
Winds that normally blow to the east get stronger, waters off the coast of North America cool down, and upwelling increases, improving the nutrients in the water.
Winds that normally blow to the west slacken, waters off the coast of South America warm-up, and upwelling decreases, reducing the nutrients in the water. Option 3.
What is El NinoEl Niño is a natural climate phenomenon that occurs in the Pacific Ocean, characterized by the warming of the ocean surface water, which causes changes in wind patterns and weather worldwide.
During El Niño, the normal trade winds weaken, which can lead to droughts, flooding, and other weather extremes in various parts of the world.
El Niño events typically occur every two to seven years and can last for several months to a few years.
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Answer: 3. Winds that normally blow to the west get stronger, waters off the coast of South America cool down, and upwelling increases, improving the nutrients in the water.
The figure shows an arrangement of a very large, charged disk of radius R = 0.2 m and a dipole such that the net electric field at the point marked 'x', at a distance d=3.2 cm from the center of the dipole, is zero. The magnitude of the dipole moment of the dipole is 1.5e-12 C.m. (Figure provided in the photo)
A. Is the disk negatively charged or positively charged?
B. Calculate the charge density of the disk.
C. Calculate the charrge on the disk.
A. We must examine the direction of the electric field the disk produces in order to identify whether it is negatively or positively charged.
If a charged disk is positively charged, the electric field it produces is directed away from the disk, and if it is negatively charged, the electric field is directed toward the disk.
The electric field owing to the disk must be directed away from the disk since the electric field due to the dipole at point "x" is directed toward the positive charge, proving that the disk is positively charged.
B. The electric field at point 'x' due to the disk can be calculated using Gauss's law, which gives us:
E = σ/(2ε0),
σ/(2ε0) = 0
σ = 0
This indicates that the disk has zero charge density.
C. Since the disk has zero charge density, the charge on the disk is also zero. Therefore, there is no charge on the disk.
Describe the dipole moment using an example.The symmetry of the molecules is established using the dipole moment. The molecules would not be symmetrical and have some dipole moment if they contained two or more polar links.
For illustration, H2O = 1.84 D and CH 3Cl, or methyl chloride, = 1
Why does a dipole moment exist?When there is a separation of charge, dipole moments happen.
Dipole moments, which result from variations in electronegativity, can happen between atoms in a covalent link or between two ions in an ionic bond.
The dipole moment increases with the difference in electronegativity.
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Please!!! Brainliest will be picked!
Maria does 1000.0 J of work to lift a 98.0 N air conditioner a distance of 5.8 meters. What is the efficiency of the pulley system Maria uses?
53%
52%
64%
57%
Answer:
The efficiency of a pulley system is given by the ratio of the output work to the input work, multiplied by 100%. In this case, the input work is the work Maria does to lift the air conditioner, which is 1000.0 J. The output work is the work done by the air conditioner, which is equal to the product of the force applied (98.0 N) and the distance lifted (5.8 m), or:
output work = force x distance = 98.0 N x 5.8 m = 568.4 J
Therefore, the efficiency of the pulley system is:
efficiency = (output work / input work) x 100%
efficiency = (568.4 J / 1000.0 J) x 100%
efficiency = 56.84%
Rounding to the nearest whole number, the efficiency of the pulley system is 57%. Therefore, the answer is option (d), 57%.
Explanation:
Urgent!!! big brain needed!
A 66.4 kg person sits on the right end of a seesaw, 2.35 m from the fulcrum. On the other end, how far from the fulcrum should a 84.2 kg person sit to balance the seesaw?
1.92 m
1.85 m
2.08 m
1.61 m
1.85 m if On the right side of a seesaw, 2.35 meters from the fulcrum, a 66.4 kg individual is seated. How far away from the fulcrum on the opposite end should an 84.2 kg.
The correct statement is B.
What is a fulcrum with an example?For those who are unsure of what a fulcrum is, The answer to the question a fulcrum is the fixed point of a lever. A seesaw, for instance, is a lever with a fulcrum with in middle. The fulcrum of a seesaw is the stationary central component.
What are a pivot and a fulcrum?• The lever's pivot or turning point, or fulcrum. • The load, or the items you are attempting to transport. • The force, or the energy expended in moving the weight. With the help of a lever, you can move a heavy object with little effort. A lever is easier to move the farther away the effort (or force) comes from the fulcrum.
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7. The sound produced by wind chimes results from resonating waves in a open-end air column.
On a cold frigid day, the speed of sound through the wind chimes is 336 m/sec. The length of
the air column is 30.0 cm. Calculate the frequency of the first, second, and third harmonics.
The frequency of the first, second, and third harmonics of the wind chimes are 560 Hz, 1120 Hz, and 1680 Hz, respectively.
What is frequency?In physics, frequency refers to the number of waves that pass through a fixed point in one unit of time. It also describes the number of cycles or vibrations experienced by a body in periodic motion in one unit of time.
The frequency of a resonating air column can be calculated using the formula:
f = nv/2L
Where f is the frequency, n is the harmonic number, v is the speed of sound, and L is the length of the air column.
For the first harmonic, n = 1:
f1 = (1)(336 m/s)/(2(0.30 m)) = 560 Hz
For the second harmonic, n = 2:
f2 = (2)(336 m/s)/(2(0.30 m)) = 1120 Hz
For the third harmonic, n = 3:
f3 = (3)(336 m/s)/(2(0.30 m)) = 1680 Hz
Thus, the first, second, and third harmonics of the wind chimes have frequencies of 560 Hz, 1120 Hz, and 1680 Hz, respectively.
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Please help me i need this to pass :((
Based on the densities of the two liquids, the height of the light liquid in the right arm of the U-tube is 0.203 cm.
What is the height L of the light liquid in the column in the right arm of the U-tube?Let's first consider the situation before the light liquid is added. At this point, the heavy liquid fills both arms of the U-tube to the same height, h.
The pressure at point A is equal to the pressure at point B
Therefore:
P₀ + ρgh = P₀ + ρgh
where P₀ is the atmospheric pressure, ρ is the density of the heavy liquid, and g is the acceleration due to gravity.
Simplifying this equation, we get:
ρgh = ρgh
Canceling out the ρ and solving for h, we get:
h = h
In other words, the height of the heavy liquid is the same in both arms of the U-tube.
Now let's consider the situation after the light liquid is added to the right arm of the U-tube. We want to find the height, L, of the light liquid in the right arm.
Since the pressure at any two points in a connected vessel is the same, the pressure at point B (the top of the heavy liquid in the right arm) must be equal to the pressure at point C (the top of the light liquid in the right arm).
Therefore, we can write:
P₀ + ρgh = P₀ + ρg(L+h)
where L is the height of the light liquid in the right arm.
Simplifying this equation, we get:
ρgh = ρgL + ρgh
Canceling out the ρgh and solving for L, we get:
L = (ρ/ρ₀)h
where ρ₀ is the density of the light liquid.
Substituting the given values, we get:
L = (0.92 g/cm³ / 13 g/cm³)h
L = 0.070769h
Now we need to find h. We can use the fact that the volume of the heavy liquid in the left arm is equal to the volume of the heavy liquid plus the light liquid in the right arm.
The volume of the heavy liquid in the left arm is:
V₁ = Ah = (13.2 cm²)(h cm)
V₁ = 13.2h cm³
The volume of the heavy liquid plus the light liquid in the right arm is:
V₂ = A(L+h) = (2.11 cm²)(L+h cm)
V₂ = 2.11(L+h) cm³
Since these volumes are equal, we can set them equal to each other and solve for h:
13.2h = 2.11(L+h)
13.2h = 2.11L + 2.11h
11.09h = 2.11L
h = (2.11/11.09)L
Substituting this into our expression for L, we get:
L = 0.070769(2.11/11.09)L
L = 0.01345L
L = 0.01444h
Substituting the given value for the density of the heavy liquid, we get:
L = 0.01444h = 0.01444(13 g/cm³)/(0.92 g/cm³)
L = 0.203 cm
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Complete question:
A heavy liquid with a density 13 g/cm³ is poured into a U-tube as shown in the left- hand figure below. The left-hand arm of the tube has a cross-sectional area of 13.2 cm², and the right-hand arm has a cross-sectional area of 2.11 cm². A quantity of 90.2 g of a light liquid with a density 0.92 g/cm³ is then poured into the right-hand arm as shown in the right-hand figure below.
Determine the height L of the light liquid in the column in the right arm of the U-tube, as shown in the second figure above. Answer in units of cm.
A block of mass 1.0 kg rests on a horizontal surface. The frictional coefficients for the block and surface are μs=0.50 and μk=0.40. (a) What is the minimum horizontal force required to move the block? (b) What is the block’s acceleration when this force is applied?
The 25N is the minimum horizontal force required to move the block, 20N force is applied.
What is mass ?The amount of matter in a body is referred to as its mass. The kilograms is the kilograms, which is the SI unit of mass (kg). Mass is defined as: Mass = Density/Volume.
What is force ?A body can change its state of rest or motion when an external force acts on it. It is directed and has a magnitude.
Therefore, 25N is the minimum horizontal force required to move the block, 20N force is applied.
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Match the term with its definition.
Flood plain is a strip of land which is next to a river that is sometimes covered in water. Mouth is the end or start of a river. Delta is the place where a river branches out into a triangular shape. Alluere is the fertile sediment.
What are the different regions of the river?A river is a natural flowing watercourse or waterbody, usually the freshwater stream, which is flowing on the surface or inside the caves towards another waterbody at a lower elevation, such as an ocean, a sea, bay, lake, wetland or another river.
Flood plain is a strip of land which is next to a river that is sometimes covered in water. Mouth is the end or start of a river. Delta is the place where a river branches out into a triangular shape. Alluere is the fertile sediment.
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what does ARD or " a red " stand for
Answer:
Atmospheric Reentry Demonstrator
Explanation:
Of thats not right im sorry
A person is being pulled away from a burning building as shown in the Figure. The angle between the vertical direction and T1 is 38.4, and the angle between T2 and the horizontal direction is 42.7. If the tension in T2 is 194.2 N. What is the weight of person W in a unit of N?
The weight of the person is approximately 650.2 N.
StepsLet W be the person's weight and T1 be the tension in the rope that creates a 38.4-degree angle with the vertical. Let T2 represent the rope's tension at a 42.7-degree angle to the horizontal.
The net force in the horizontal direction is given by:
T2 - T1*sin(38.4) = 0
Solving for T1, we get:
T1 = T2 / sin(38.4) = 194.2 N / sin(38.4) ≈ 311.1 N
The net force in the vertical direction is given by:
W - T1cos(38.4) - T2sin(42.7) = 0
Substituting the values we know, we get:
W - 311.1cos(38.4) - 194.2sin(42.7) = 0
Solving for W, we get:
W ≈ 650.2 N
Therefore, the weight of the person is approximately 650.2 N.
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can you please help me ASAP show your answer on paper please make it readable
Different elements' atoms can have different quantities of neutrons in their nuclei. For instance, stable helium atoms with one or two neutrons are known, although they both have two protons.
What is Atomic mass?Isotopes are the several varieties of helium atoms that have differing masses.
The total number of protons and neutrons in an isotope's nucleus is referred to as the mass number. This is due to the fact that each proton and neutron has a mass of one atomic mass unit (amu).
We may get the mass of the atom by multiplying the total number of protons and neutrons by 1 amu. Each element is made up of a variety of isotopes.
Therefore, Different elements' atoms can have different quantities of neutrons in their nuclei. For instance, stable helium atoms with one or two neutrons are known, although they both have two protons.
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Pleas Help
Questions are in the picture
Writing by hand as opposed to printing is referred to as handwriting. The term "handwriting" has been more or less limited to denote the distinctive writing style that is unique to each individual.
What is Handwriting?Schools placed a strong emphasis on teaching handwriting before the common usage of typewriters, when it had more practical value.
At the elementary schools, scales for evaluating the quality of the script from grade to grade were developed, and a number of meticulous investigations of the handwriting movements were conducted.
Research have shown that during writing, both the grip pressure on the penholder and the tip pressure on the paper change continuously. Moreover, the speed of writing is not constant and is dependent on the type of stroke being used.
Therefore, Writing by hand as opposed to printing is referred to as handwriting. The term "handwriting" has been more or less limited to denote the distinctive writing style that is unique to each individual.
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(ii) Describe one use of optical fibres in medicine. You may draw a diagram
Answer:
One use of optical fibers in medicine is for endoscopy. Endoscopy is a medical procedure in which an instrument called an endoscope is used to visualize and examine the internal organs or structures of the body. Optical fibers are used in the endoscope to transmit light from a source to the end of the instrument, allowing doctors to see inside the body without making large incisions. The endoscope typically has a camera attached to its end, which captures images of the body's interior and sends them back through the optical fibers to a screen where they can be viewed by the doctor.
Here is a simple diagram of how optical fibers are used in endoscopy:
+-----------------+
| Light |
| Source |
+--------+--------+
|
|
|
+------+-------+
| Endoscope |
| |
+--------------+
|
|
|
+------+-------+
| Camera |
+--------------+
|
|
|
+------+-------+
| Display |
+--------------+
Explanation:
In the diagram, the light source generates light, which is transmitted through the optical fibers in the endoscope. The light is then emitted at the end of the endoscope, illuminating the internal organ or structure being examined. The camera attached to the endoscope captures images of the illuminated area, and sends the images back through the optical fibers to a display screen where they can be viewed by the doctor.
3. When your body fills with extra electrons and you touch a good conductor, you get a shock. Is this
shock an example of static electricity or an electrical current? Explain your answer. (Hint: Review
the definitions of static and current.)
When your body fills with extra electrons and you touch a good conductor, you get a shock. This is an example of an electrical current in this type of scenario.
What is Static electricity?This is referred to as an imbalance of electric charges within or on the surface of a material or between materials and is usually created through human effort.
Electrical shock on the other hand is created through electrical means such as an individual's contact with a good conductor which leads to the body being filled with extra electrons due to the amount of electric current flowing through the material o0r surface.
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The maximum acceleration is given as 0.2m/s2
A) find the velocity and
displacement of the train in 12s if it starts to speed up from rest.
B) How long will it take for this train to reach a velocity of 54km/ h if it continues to accelerate at the same rate?
A) the train's final velocity after 12 seconds of accelerating at 0.2 m/s^2 from rest is 2.4 m/s, and its displacement is 14.4 m.
B) it will take the train 75 seconds to reach a velocity of 54 km/h (15 m/s) if it continues to accelerate at the same rate of 0.2 m/s^2.
How The Train's acceleration was calculatedA) If the train starts from rest, its initial velocity is 0 m/s. Using the equation for constant acceleration, we can find the final velocity and displacement of the train after 12 seconds:
Final velocity = initial velocity + acceleration x time
Final velocity = 0 m/s + 0.2 m/s^2 x 12 s
Final velocity = 2.4 m/s
Displacement = (initial velocity x time) + (1/2 x acceleration x time^2)
Displacement = (0 m/s x 12 s) + (1/2 x 0.2 m/s^2 x (12 s)^2)
Displacement = 14.4 m
Therefore, the train's final velocity after 12 seconds of accelerating at 0.2 m/s^2 from rest is 2.4 m/s, and its displacement is 14.4 m.
B) First, we need to convert the final velocity to m/s:
54 km/h = 15 m/s (rounded to two decimal places)
Using the same equation for constant acceleration, we can solve for the time it takes for the train to reach a velocity of 15 m/s with an acceleration of 0.2 m/s^2:
Final velocity = initial velocity + acceleration x time
15 m/s = 0 m/s + 0.2 m/s^2 x time
time = 75 seconds
Therefore, it will take the train 75 seconds to reach a velocity of 54 km/h (15 m/s) if it continues to accelerate at the same rate of 0.2 m/s^2.
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What do I have to do on these help me out
Momentum After ∞ The velocity of the truck after the collision is 10m/s.
What is velocity ?Velocity is a vector quantity that measures the rate of change of an object's position with respect to time. It is a physical quantity that describes both the speed and direction of an object's motion. Velocity is the rate of change of an object's position, and is equal to the total distance traveled divided by the total time it took to travel that distance. It is represented by the symbol v, and its SI unit is m/s. Velocity is an important concept in physics, as it is used to describe the motion of objects in the universe.
This is because the total momentum before the collision (5000kg*20m/s) is equal to the total momentum after the collision (5000kg*10m/s + 1200kg*0m/s). So, the velocity of the truck after the collision is equal to 10m/s.
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The figures show a hypothetical planetary system at two different times. The system has a star S and three planets, labeled A, B, and C. The table provides the mass of each body in the system, as well as their spatial coordinates (,)
in their initial and final positions. The spatial coordinates of the bodies are given in Astronomical Units (AU).
Body Mass (kg) Initital Position Final Position
S S=2.0197×1030
(0,0)
(S,S)
A A=2.5623×1028
(0.1119,0)
(0,−0.2381)
B B=6.2841×1026
(0.3751,1.2975)
(−1.9117,0)
C C=8.6951×1027
(0,1.4245)
(−0.8865,−0.8445)
The initial velocity of the center of mass of the system is zero.
Find the magnitude S
of the star's displacement from the origin in its final position.
The magnitude S of the star's displacement from the origin in its final position is approximately 1.9117 AU.
What are Astronomical Units?Astronomical Units (AU) are a unit of distance commonly used in astronomy to measure distances within our solar system. One AU is defined as the average distance between the Earth and the Sun, which is approximately 93 million miles or 149.6 million kilometers.
To find the magnitude S of the star's displacement from the origin in its final position, we can use the distance formula:
distance = square root of ((x2 - x1)² + (y2 - y1)²)
where (x1, y1) are the initial coordinates of the star and (x2, y2) are the final coordinates of the star.
In this case, the initial coordinates of the star are (0, 0) and the final coordinates of the star are (S, S). We don't know the value of S yet, but we can use the fact that the initial velocity of the center of mass of the system is zero to find it.
The center of mass of the system can be found using the formula:
(m₁x₁ + m₂x₂ + m₃x₃) / (m₁ + m₂ + m₃)=x cm
(m₁y₁ + m₂y₂ + m₃y₃) / (m₁ + m₂ + m₃)=ycm
where m₁, m₂, and m₃ are the masses of the star and the two planets, and (x₁, y₁), (x₂, y₂), and (x₃, y₃) are their initial coordinates.
Using the values from the table, we can calculate the center of mass of the system:
x_cm = (2.0197×10³⁰ * 0 + 2.5623×10²⁸ * 0.1119 + 6.2841×10²⁶ * 0.3751 + 8.6951×10²⁷ * 0) / (2.0197×10³⁰ + 2.5623×10²⁸ + 6.2841×10²⁶ + 8.6951×10²⁷) ≈ 0.0038 AU
y_cm = (2.0197×10³⁰ * 0 + 2.5623×10²⁸ * 0 + 6.2841×10²⁶ * 1.2975 + 8.6951×10²⁷ * 1.4245) / (2.0197×10³⁰ + 2.5623×10²⁸ + 6.2841×10²⁶ + 8.6951×10²⁷) ≈ 1.3019 AU
Since the initial velocity of the center of mass is zero, the final velocity must also be zero. This means that the final position of the center of mass must be the same as the initial position.
Setting (x_cm, y_cm) in the final position to (0, 0), we can solve for S:
S = √(x₂² + y₂²) = √((0 - 1.9117)² + (0 - 0)²) ≈ 1.9117 AU
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Dantes peak 1997: the scientists know an eruption is immanent because the _____ are swarming and the ______ readings increase.
The scientists in the 1997 film "Dante's Peak" know an eruption is coming because of "rats" are congregating as well as the "sulfur dioxide" measurements are rising.
Is the mountain Dante's Peak real?Peak Dante | 1997 Wallace, located in Idaho's Western Rockies in the Bitteroot Alps, serves as the model for the fictional hamlet of "Dante's Peak". Digitally added elements include "Dante's Peak" and the surrounding alpine environment. The setting for Michael Cimino's novel Heaven's Gate was Wallace.
A failure, Dante's Peak?Dante's Peak may not have been warmly accepted at the time as it was treated seriously. It was a dreadful bomb that barely made $175 million just at movie office, like its rival Volcano.
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Seismic waves, known as P – waves, and S – waves can be use to study the earths interior, which otherwise would have be been impossible to explore. Which properties of P Dash and S – waves allow the study of earths interior.
(Multiple choice)
A. They travel at varying speeds, depending on the composition of layer.
B. They deflected while passing through layers of different compositions.
C. They are produced during earthquakes and volcanic eruptions.
D S – waves cannot pass through a layer of liquid composition
How would you find an answer to something that looks like this. If one object is circling around something at a distance d, and speed, v, how does the speed of of another object distance, 2d, look like? How would you solve this using kinematics or newton laws?
The speed of the second object moving in a circle of radius 2d is four times the speed of the first object moving in a circle of radius d.
What is Circular Motion?
Circular motion is the movement of an object in a circular path around a fixed point or axis. In circular motion, the object moves at a constant speed but changes direction continuously, resulting in a circular path. The direction of the object's motion is always perpendicular to the radius of the circle, pointing towards the center of the circle.
To solve this problem, we can use the laws of circular motion and apply them to the two objects.
According to the laws of circular motion, the speed of an object moving in a circular path is determined by the radius of the circle and the time it takes for the object to complete one revolution (the period).
v = 2πr / T
where v is the speed of the object, r is the radius of the circle, and T is the period of revolution.
For the first object moving in a circle of radius d with speed v, we can use this formula to calculate its period of revolution:
T = 2πd / v
For the second object moving in a circle of radius 2d, we can use the same formula to calculate its speed:
v' = 2π(2d) / T'
where v' is the speed of the second object and T' is its period of revolution.
To find the relationship between the speed of the second object and the speed of the first object, we need to eliminate T' from the above equation. We can do this by substituting the expression for T in terms of v into the equation for v':
v' = 2π(2d) / (2πd / v)
Simplifying, we get:
v' = 4v
Therefore, the speed of the second object moving in a circle of radius 2d is four times the speed of the first object moving in a circle of radius d.
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A ballast bag is dropped from a balloon that is 300 m above the ground and rising at 13 m/s. For the bag, find (a) the maximum height reached, (b) its position and velocity 5.0 s after it is released, and (c) the time at which it hits the ground.
a. The maximum height reached by the ballast bag is approximately 300 m + 8.45 m = 308.45 m.
b. 5.0 s after it is released, the ballast bag is at a height of approximately 177.5 m above the ground, and its velocity is approximately -36.5 m/s
c. The ballast bag hits the ground approximately 18.1 s after it is released.
(a) To find the maximum height reached by the bag, we can use the kinematic equation:
v_f^2 = v_i^2 + 2aΔy
where v_f is the final velocity (which is zero at the maximum height), a is the acceleration due to gravity (approximately -9.8 m/s^2), and Δy is the change in height.
Rearranging and solving for Δy, we get:
Δy = v_i^2 / (2a) = (13 m/s)^2 / (2*(-9.8 m/s^2)) ≈ 8.45 m
Therefore, the maximum height reached by the ballast bag is approximately 300 m + 8.45 m = 308.45 m.
(b) To find the position and velocity of the bag 5.0 s after it is released, we can use the equations:
y = y_i + v_it + (1/2)at^2
v_f = v_i + at
where y_i is the initial height (300 m), v_i is the initial velocity (13 m/s), t is the time elapsed (5.0 s), and a is the acceleration due to gravity (-9.8 m/s^2).
Using these equations, we can find:
y = 300 m + 13 m/s*(5.0 s) + (1/2)(-9.8 m/s^2)(5.0 s)^2 ≈ 177.5 m
v_f = 13 m/s + (-9.8 m/s^2)*(5.0 s) ≈ -36.5 m/s
Therefore, 5.0 s after it is released, the ballast bag is at a height of approximately 177.5 m above the ground, and its velocity is approximately -36.5 m/s (i.e., it is moving downward).
(c) To find the time at which the ballast bag hits the ground, we can use the equation:
y = y_i + v_i*t + (1/2)at^2
Setting y = 0 (since the ground is at y = 0), y_i = 300 m, v_i = 13 m/s, and a = -9.8 m/s^2, we get:
0 = 300 m + 13 m/st + (1/2)(-9.8 m/s^2)*t^2
Rearranging and solving for t using the quadratic formula, we get:
t = (-13 ± sqrt(13^2 - 4*(-4.9)(300))) / (2(-4.9))
The positive solution is the time at which the ballast bag hits the ground:
t ≈ 18.1 s
Therefore, the ballast bag hits the ground approximately 18.1 s after it is released.
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A 2000-kg car and a 7500-kg truck are traveling side by side at the same speed on a level road when the light ahead turns red. The drivers slam on their brakes, causing both vehicles to skid to a stop. The car and truck have the same coefficients of static and kinetic friction between their tires and the road surface, which one travels a greater distance before stopping?
Answer:
The distance each vehicle travels before coming to a stop depends on its initial speed, mass, and the coefficient of friction between its tires and the road surface. However, since the car and truck have the same coefficients of static and kinetic friction between their tires and the road surface, their stopping distances will be directly proportional to their masses.
To calculate the stopping distances, we can use the following formula for the distance traveled during a constant deceleration:
d = v^2 / 2a
where d is the stopping distance, v is the initial velocity, and a is the deceleration. The deceleration is related to the coefficient of friction and the gravitational acceleration as follows:
a = μg
where μ is the coefficient of friction and g is the gravitational acceleration (9.81 m/s^2).
For the car, the initial velocity is not given, so let's assume it was traveling at 30 m/s (108 km/h) before the brakes were applied. Then, the deceleration is:
a = μg = μ × 9.81 m/s^2
For the car, the mass is 2000 kg, so the stopping distance is:
d_car = v^2 / 2a = 900 / (2 × μ × 9.81) = 45.84 / μ
For the truck, we can use the same formula, but with the mass of 7500 kg:
d_truck = v^2 / 2a = 900 / (2 × μ × 9.81 × 7500/2000) = 153.12 / μ
Therefore, the truck travels a greater distance before stopping than the car, by a factor of 153.12 / 45.84 = 3.34, assuming they were traveling at the same initial speed.
Katie pushes a crate with 50N and does 150Nm of work. How far did she push the crate?
The work done by Katie is equal to the force applied multiplied by the distance over which it is applied.
What is force ?Force is an invisible push or pull on an object that is exerted by another object. It is a vector quantity and can be described by its magnitude and direction. Force can cause an object to accelerate, decelerate, or remain in its state of motion. Examples of force include gravity, friction, electromagnetic force, and the force of a push or pull. Force is an essential part of our everyday lives, from the force of gravity that keeps us on the ground, to the force of a push or pull that we use to move objects.
Therefore, the equation to calculate the distance is:
Work = Force x Distance
150Nm = 50N x Distance
Distance = 150Nm / 50N
Distance = 3m
Katie pushed the crate 3m.
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One person solved 40 math problems in her head. Another
person picked up a kitten. Which person did more work,
in the scientific sense?
The person who picked up the kitten did more work.
What is work done ?Work done is defined as the dot product of force and displacement.
Here,
One person solved 40 math problems in her head. Here no physical force is applied and so no displacement has happened. Hence the work done here is zero.
Another person picked up a kitten. Here the force applied is mg and displacement of the cat is the height to which it is picked up. So, the work done, W = mgh.
Hence,
The person who picked up the kitten did more work.
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Two particles A and B are moving in the same direction on parallel horizontal tracks. At a certain point the particle A, travelling with a speed of 7 m s-¹ and accelerating uniformly at 1.5 m s-2 overtakes B travelling at 3 m s-¹ and accelerating uniformly at 2.5 m s-². Calculate the period of time which elapses before B overtakes A. If, after this time, B then ceases to accelerate and continues at constant speed, calculate the time taken for A to overtake B again.
Given the acceleration of A is 1.5 m/s² and that of B is 2.5 m/s² . Then for 5 seconds A will overtake B and from the 6th second B will overtake A. Then if B ceases to accelerate then from 6th second A will overtake B again.
What is acceleration ?Acceleration of an object is the rate of change in its velocity. Like velocity acceleration is a vector quantity characterized by a magnitude and direction.
Given acceleration of A = 1.5 m/s²
velocity = 7 m/s
acceleration of B = 2.5 m/s²
velocity = 3 m/s.
Then, for the fist second, A will accelerate to 8.5 m/s and B to 5.5 m/s. If this continues with their uniform acceleration, then, at the 5th second B will have a velocity of 15.5 m/s and A have 14.5 m/s. Thus, for 5 seconds A will overtake B, after that B will overtake.
Then, if B ceases to accelerate, then after 6 seconds, A will again overtake B.
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1. Osmium is the densest metal on earth. It has a density of 22.61 g.cm³. Which of the following best represents this density in kg.m³?
Answer: 2.72
Explanation: if this is not correct I don't know what to tell you other than don't use for answers and instead LEARN
Please help (50 points and Brainly)
Explain the process that results in sounds being louder at night.
In fact ! the level of the sounds coming out of our throat is the same during day and night. But the sound is heard at a greater distance in the night than in the day. Because the intensity of noise is also less at night than during the day.which makes our voice heard over longer distances The air is relatively cooler at night due to which the humidity of the air increases. The speed of sound increases when the air is more humid Due to which we can hear loud and long distance.
Explanation:The sounds being louder at night due to Refraction of sound waves.
The Sound waves travel differently at night than during the day. During the day the sound bends away from the ground in during the night it bends towards the ground.
Know more:Reflection
When sound travels in a given medium, it strikes the surface of another medium and bounces back in some other direction, this phenomenon is called the Reflection of sound.The first law of Reflection
The incident wave the reflected wave, and the normal at the point of incidence lie on the same plane.The second law of Reflection
The angle of incidence is equal to the angle of reflection.
Interference of sound
The Constructive interference : that situation where the resultant wave is bigger than either of the two original, is said to be constructive interference.The Destructive interference : The sum of two waves can be less than either wave alone and can even be zero.Diffraction of sound
It is the spreading of waves around obstacles.Diffraction takes place with sound with when electromagnetic radiation such as light, X-rays and gamma rays .A loop has r= 0.2 m and is in a magnetic field of magnitude B. The magnetic field is perpendicular to the plane of the loop. B changes from B1 = 0.60 T to B2 = 9.5 T.
Δt is at a constant rate at 8 seconds.
a) Express the magnitude of the average induced electric field, E, induced in the loop in terms of ΔΦ, r, and Δt
b) calculate the value in N/C
A) The magnitude of the average induced electric field is E = (ΔΦ/rΔt). B) The value in N/C is 105 N/C.
What is magnitude?Magnitude is a measure of the size or strength of a physical quantity such as velocity, force, pressure, or energy. It is usually expressed in terms of a numerical value, either relative to a standard reference level or to some other physical quantity. Magnitude is used in various scientific fields, such as physics, engineering, and astronomy, to quantify properties of physical objects or phenomena. In physics, magnitude is used to compare the size or strength of different forces, such as gravity, electricity, and magnetism.
a) The magnitude of the average induced electric field, E, induced in the loop is given by the equation E = (ΔΦ/rΔt), where ΔΦ is the change in flux, r is the radius of the loop, and Δt is the time interval over which the field changes.
b) To calculate the value of E in N/C, we need to use the given values. Substituting B1 = 0.60 T, B2 = 9.5 T, r = 0.2 m, and Δt = 8 s, we get ΔΦ = 8π x (9.5 - 0.6) = 84.4 Wb. Substituting this in the equation, we get E = (84.4/0.2 x 8) = 105 N/C.
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