1) The longitudinal waves move in parallel direction to the source of vibration. The transverse waves move in perpendicular direction to the source of vibration . They are similar in the sense that energy is transferred in the form of waves.
2) Reflection occurs when waves bounce from a surface back toward the source. Refraction is when waves are deflected when the waves go through a substance.
3) The Law of Conservation of Energy
states that energy can neither be created
nor destroyed, it can only be transferred or
changed from one form to another.
Show that the force of gravity is 3.5 * 1022 N between Earth and the Sun
(Sun’s mass = 2.0 x 1030 kg; average Earth–Sun distance = 1.5 x 1011 m).
The force of gravity between the sun and the earth is determined as 3.54 x 10²² N.
What is force of gravity?This is the force of gravity is the force exerted between two objects in the universe.
According to Newton's law of universal gravitation, two bodies in space pull on each other with a force proportional to the product of their masses and the inversely proportional to the square of the distance between them.
F = Gm1m2/r²
where;
m1 is mass of the sunm2 is mass of the earthr is the distance between the two bodiesF = (6.67 x 10⁻¹¹ x 2 x 10³⁰ x 5.97 x 10²⁴) / (1.5 x 10¹¹)²
F = 3.54 x 10²² N
Thus, the force of gravity between the sun and the earth is determined as 3.54 x 10²² N.
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Help me please
For a velocity versus time graph how do you know what the velocity is at a certain
time? How do you know the acceleration at a certain time? How do you know the
Displacement at a certain time?
Answer:
For a velocity versus time graph how do you know what the velocity is at a certain time?
Ans: By drawing a line parallel to the y axis (Velocity axis) and perpendicular to the co-ordinate of the Time on the x axis (Time Axis). The point on the slope of the graph where this line intersects, will be the desired velocity at the certain time.
_____________________________________________________
How do you know the acceleration at a certain time?
[tex]Ans: We\ know\ that\ acceleration = \frac{Final\ velocity-Initial\ Velocity}{Time\ taken}[/tex]
Hence,
By dividing the difference of the Final and Initial Velocity by the Time Taken, we could find the acceleration.
_________________________________________________________
How do you know the Displacement at a certain time?
Ans: As Displacement equals to the area enclosed by the slope of the Velocity-Time Graph, By finding the area under the slope till the perpendicular at the desired time, we find the Displacement.
_________________________________________________________
Energy Transformation
A car with a mass of 2000 kg is traveling down the highway at a constant 20 m/s. How much kinetic energy does it have?
100 J
50 J
400.000 J
40.000 J
Answer:
K =400000 J
Explanation:
Kinetic Energy
Is the energy an object has due to its state of motion. It's proportional to the square of the speed.
The equation for the kinetic energy is:
[tex]\displaystyle K=\frac{1}{2}mv^2[/tex]
Where:
m = mass of the object
v = speed at which the object moves
The kinetic energy is expressed in Joules (J)
The car has a mass of m=2000 Kg and travels at v=20 m/s. Calculating the kinetic energy:
[tex]\displaystyle K=\frac{1}{2}2000*20^2[/tex]
Calculating:
K =400000 J
What is the final velocity of an object that starts from rest and accelerates uniformly at 4
m/s2 over a distance of 8 m?
Answer:
8m/s
Explanation:
Given parameters:
Initial velocity = 0m/s
Acceleration = 4m/s²
Distance = 8m
Unknown:
Final velocity = ?
Solution:
To solve this problem, we use the right motion equation and find the unknown.
The right motion equation to solve this problem is given as :
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the unknown acceleration
S is the distance
Now insert the parameters and solve;
v² = 0² + 2 (4) (8)
v² = 64
v = 8m/s
A delusion is best characterized as
Answer:
This is the most common form of delusional disorder. In this form, the affected person fears they are being stalked, spied upon, obstructed, poisoned, conspired against or harassed by other individuals or an organization.
Explanation:
hope this help
pick me as the brainliest
Convert 90 mph into meter seconds and feer seconds 1 mile equals 1600 m 1 m equals 3.3 feet one hour equals 3600 seconds
The speed of 90 mph converted into meter per seconds and feet per seconds is 40 m/s and 132 ft/s respectively.
Hw can the speed of 90 mph be converted into meter per seconds and feet per seconds?The speed of an object or body is the distance covered per unit time.
Speed = distance/timeThe given speed is in miles per hour.
To convert miles per hour to meter per second, the following steps are followed;
1 mile = 1600 m
90 miles = 90 * 1600 = 144000 m
1 hour = 3600 s
90 mph in m/s = 144000/3600
90 mph in m/s = 40 m/s
To convert meter per second to feet per second, the following steps are followed;
1 m = 3.3 ft
144000 m = 3.3 * 144000 = 475200 ft
1 hour = 3600 s
90 mph in ft/s = 475200/3600
90 mph in ft/s = 132 ft/s
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which two processes will be involved as this chick grows into a chicken
Answer:
CELL DIVISION THAT INVOLVES MITOSIS AND CELL GROWTH DUE TO TAKING IN NUTRIENTS
Explanation:
Answer: Cell growth due to taking in nutrients and Cell growth due to fertilization.
Explanation:
Which event is an example of condensation?
• A. A spilled drop of rubbing alcohol disappears.
O B. Fog forms in a valley.
• C. A puddle dries when exposed to the Sun.
D. A lake becomes a skating rink in the winter.
Correct answer B
Answer:
B. Fog forms in a valley.
Explanation:
A car with an initial speed of 6.50 m/s accelerates at a uniform rate of 0.920 m/s2 for
3.60 s. Find the final velocity.
Answer:
v = 9.812 m/s
Explanation:
Given that,
The initia speed of a car, u = 6.5 m/s
Acceleration of the car, a = 0.92 m/s²
Time, t = 3.6 s
We need to find the final velocity of the car. Let the final velocity be v. Using equation of motion to find it as follows :
v = u +at
Putting all the values,
v = 6.5+(0.92)(3.6)
v = 9.812 m/s
So, the final velocity of the car is 9.812 m/s.
1. The distance between New York City and Dallas is about 1500 miles. Assume you drive to New York City at an average velocity of 80 miles per hour - how many hours will it take to reach New York City?
Answer: 22 hours 15 minutes
Explanation: The calculated flying distance from New York City to Dallas is equal to 1371 miles which is equal to 2206 km. If you want to go by car, the driving distance between New York City and Dallas is 2492.32 km. If you ride your car with an average speed of 112 kilometers/hour (70 miles/h), travel time will be 22 hours 15 minutes.
What do scientists do? A. They use their knowledge to make public policy. B. They make ethical decisions for the government. C. They gather evidence to help answer questions. D. They discover as many facts as they can.
Answer:
Explanation:
C
HELP I WILL GIVE BRAINLIEST!
In the EXPLORE section of your lesson 4.08 on Potential energy there were several animations to watch that provided a graphic illustrating how the PE and KE in a system changed as a skateboarder rides a halfpipe or a pendulum moves, why did the bar for the total energy remain constant?Question 1 options:
A. Energy is converted from kinetic to potential and potential to kinetic, but the total amount of energy is conserved
B. Because these models do not take into account the impact of friction and air resistance and are helping to solidify the concept of energy conservation and that the total mechanical energy remains constant in that model
C. all answers given are correct
D. This is because no energy is being created or destroyed in this system
Answer:
Answer:B
Explanation:
Because it all stayed consistant
A cheetah can run at a maximum speed
106 km/h and a gazelle can run at a maxi-
mum speed of 75.6 km/h.
If both animals are running at full speed,
with the gazelle 63.4 m ahead, how long before
the cheetah catches its prey?
Answer in units of s.
Answer:
Cheetah speed:
Its position at time t is given by
(1)
Gazelle speed:
the gazelle starts S0=96.8 m ahead, therefore its position at time t is given by
(2)
The cheetah reaches the gazelle when . Therefore, equalizing (1) and (2) and solving for t, we find the time the cheetah needs to catch the gazelle:
(2) To solve the problem, we have to calculate the distance that the two animals can cover in t=7.5 s.
Cheetah:
Gazelle:
So, the gazelle should be ahead of the cheetah of at least
Explanation: try these steps to answer
Find the object's positions x1 , x2 , x3 , and x4 at times t1=2.0s , t2=4.0s , t3=13s , and t4=17s .
Answer:
Explanation:
x₁(2.0) = 4 m
x₂(4.0) = 7 m
x₃(13) = 9 m
x₄(17) = 0 m
A light ray passing from medium 1 to medium 2 is bent away from the perpendicular normal to the boundary surface. What happens to the velocity of the refracted wave as it enters medium 2?
The velocity increases.
The velocity decreases.
The velocity becomes zero.
The velocity does not change.
Answer:
The answer is a for Plato users.
Explanation:
Since the angle of the refracted ray moves away from the normal, it must be traveling in a faster medium.
Answer: Velocity Increases
Explanation: Plato
I really need help with this
Answer: i've done the same thing before kinda but anyway use this website that was recommended to me by a teacher https://www.britannica.com/science/mica (i got an A btw)
A solid disc is rolling without slipping at constant speed on a horizontal surface. What is the ratio of its rotational kinetic energy to its translational kinetic energy
Answer:
2/7
Explanation:
The Rotational Kinetic Energy is given as RKE = 1/2 * I * w², where
w = v/R and
I = 2/5mR²
The Translational Kinetic Energy is given as TKE = 1/2 * m * v²
RKE = 1/2 * 2/5mR² * (v/R)²
RKE = 1/2 * 2/5mR² * v²/R²
RKE = 1/5mv²
To get the ratio, we use the relation
RKE / (TKE + RKE)
and thus, we have
1/5mv² / (1/2mv² + 1/5mv²)
1/5mv² / 7/10mv²
1/5 ÷ 7/10
1/5 * 10/7
2/7
Therefore, the ratio of RKE to TKE is 2/7
A bicyclist was moving at a rate of 3 m/s, and then sped up to 4 m/s. If the cyclist has a mass of 100 kg, how much work was needed to increase his velocity? (Hint: Use the work-kinetic energy theorem.) O A. 1250 J B. 450 J O c. 350 j D. 800 J
Answer:
i got b but urs is a little different tell me if right
Explanation:
i go 100 on my test
Consider the vector below. Determine its length and direction. Vector: 2i+11j+5k2i+11j+5k Magnitude: Direction (unitized):
Answer:
Magnitude: [tex]\|\vec v\| = 5\sqrt{6}[/tex], Direction (unitized): [tex]\vec u = \frac{\sqrt{6}}{6}\,\hat{i} + \frac{11\sqrt{6}}{12}\,\hat{j}+\frac{5\sqrt{6}}{12}\,\hat{k}[/tex]
Explanation:
Let [tex]\vec v = a\,\hat{i}+b\,\hat{j}+c\,\hat{k}[/tex]. The magnitude of the vector is represented by the Pythagorean formula:
[tex]\|\vec v\| = \sqrt{a^{2}+b^{2}+c^{3}}[/tex] (1)
And the direction is represented by the direction cosines, measured in sexagesimal degrees, that is:
[tex]\theta_{x} = \cos^{-1} \frac{a}{\|\vec v\|}[/tex] (2)
[tex]\theta_{y} = \cos^{-1} \frac{b}{\|\vec v\|}[/tex] (3)
[tex]\theta_{z} = \cos^{-1}\frac{c}{\|\vec v\|}[/tex] (4)
If we know that [tex]a = 2[/tex], [tex]b = 11[/tex] and [tex]c = 5[/tex], then the magnitude and directions of the vector are, respectively:
[tex]\|\vec v\| = \sqrt{2^{2}+11^{2}+5^{2}}[/tex]
[tex]\|\vec v\| = 5\sqrt{6}[/tex]
The direction can be represented by the following unit vector:
[tex]\vec u = \frac{\vec v}{\|\vec v\|}[/tex] (5)
[tex]\vec u = \frac{2\,\hat{i}+11\,\hat{j}+5\,\hat{k}}{2\sqrt{6}}[/tex]
[tex]\vec u = \frac{\sqrt{6}}{6}\,\hat{i} + \frac{11\sqrt{6}}{12}\,\hat{j}+\frac{5\sqrt{6}}{12}\,\hat{k}[/tex]
Elizabeth was a brilliant lawyer until she began hearing voices and seeing things that are not there. She also has trouble with her thought processes and making sense in her speech. She is suffering from:
A. fugue
B. schizophrenia
C. anxiety
D. dissociation
Answer:
B) Schizophrenia
Explanation:
Hope this helps!
Two small positively charged particles,whose combine charges give 4x10^-6C are situated in the air. If they repel each other by an electrostatic force of 1.0N when the particles are separated by 2.5m, determine the charge on the particle
(k=9x10^9N.M²C².)
Answer:
Down >3
Explanation:
Two small positively charged spheres have a combined charge of 5.0 × 10−5 C. If each sphere is repelled from the other by an electrostatic force of 1.0N Two small positively charged spheres have a combined charge of 5.0 × 10−5 C. If each sphere is repelled from the other by an electrostatic force of 1.0N
what is the frequency of a wave traveling at 340 m/s with a wavelength of 125 m
Answer:
I think it's really cool
in both a dry cell and a wet cell battery, what causes the production of an electrical current.
a. chemical reaction

b.a step down substation transformer
c. magnets
d. generators at a power plant
Answer:
a. chemical reaction
Explanation:
In both a dry and wet cell battery, electric currents are produced through chemical reactions.
Both cells are together called electrochemical cells.
In these cells, chemical reactions produce an electric current. They are devices that converts chemical energy into electrical energyThe reactions here are spontaneous redox reactions. This causes the current to flow on their own in the circuit.What is a variable in an experiment?
Answer: anything that can change or be changed
Explanation: In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment.
Answer:
Dependend variable or Independent variable
Explanation:
A variable is anything that can change or be changed. In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment. Experiments contain different types of variables.
Four forces act upon a particle in the following manner: 50 N at 20° above the positive -
axis, 80 N at 40° to the left of the positive y-axis, 120 N at 35 below the negative
and 40 N at 25° to the right of the negative y-axis. Determine the magnitude and direction
of the resultant force.
axis
The magnitude of the resultant force is 89.88 N and the direction of the resultant force is 17.22°
We know that,
Vector of a force F = ( F cos θ, F sin θ )
Magnitude of a force F = √ ( x² + y² )
Angle of a force, θ = [tex]tan^{-1}[/tex] ( y / x )
Given that,
[tex]F_{1}[/tex] = 50 N, θ[tex]_{1}[/tex] = 20°
[tex]F_{2}[/tex] = 80 N, θ[tex]_{2}[/tex] = 130°
[tex]F_{3}[/tex] = 120 N, θ[tex]_{3}[/tex] = 215°
[tex]F_{4}[/tex] = 40 N, θ[tex]_{4}[/tex] = 295°
Vector of Resultant force, [tex]F_{R}[/tex] = ( [tex]F_{1}[/tex] cos θ[tex]_{1}[/tex], [tex]F_{1}[/tex] sin θ[tex]_{1}[/tex] ) + ( [tex]F_{2}[/tex] cos θ[tex]_{2}[/tex], [tex]F_{2}[/tex] sin θ[tex]_{2}[/tex] ) + ( [tex]F_{3}[/tex] cos θ[tex]_{3}[/tex], [tex]F_{3}[/tex] sin θ[tex]_{3}[/tex] ) + ( [tex]F_{4}[/tex] cos θ[tex]_{4}[/tex], [tex]F_{4}[/tex] sin θ[tex]_{4}[/tex] )
[tex]F_{R}[/tex] = ( 50 cos 20°, 50 sin 20° ) + ( 80 cos 130°, 80 sin 130° ) + ( 120 cos 215°, 120 sin 215° ) + ( 40 cos 295°, 40 sin 295° )
[tex]F_{R}[/tex] = ( - 85.83, - 26.69 )
Magnitude of Resultant force, [tex]F_{R}[/tex] = √ ( - 85.83 )² + ( - 26.69 )²
[tex]F_{R}[/tex] = √ 7366.79 + 712.36 = √ 8079.15
[tex]F_{R}[/tex] = 89.88 N
θ = [tex]tan^{-1}[/tex] ( - 26.69 / - 85.83 ) = [tex]tan^{-1}[/tex] ( 0.31 )
θ = 17.22°
Therefore,
Magnitude of the resultant force = 89.88 N Direction of the resultant force = 17.22°To know more about resultant forces
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What will happen to the ice cubes in the two spoons? How will they be different?
Answer: the ice cube to melt more quickly on the metal block than on the wooden block.
Explanation:
A 4-kg object is moving with a speed of 5 m/s at a height of 2 m. The kinetic
energy of the object is approximately _J.
Hello!
[tex]\large\boxed{KE = 50J}[/tex]
Use the formula for kinetic energy:
[tex]KE = \frac{1}{2}mv^{2}[/tex]
Plug in the given mass and velocity:
[tex]KE = \frac{1}{2} (4)5^{2}[/tex]
Simplify:
[tex]KE = \frac{1}{2} (100)\\\\KE = 50 J[/tex]
What is the volume of a rock with a density of 45 g/mL and a mass of 855 g?
The volume of a rock with a density of 45 g/mL and a mass of 855g is 19mL.
The volume of the rock can be calculated as
[tex]density = \frac{mass}{volume}[/tex]
Density is the measurement of how tightly a material is packed
together.
by using the above formula of density we can find volume as
[tex]volume = \frac{mass}{density }[/tex]
v = m/ρ
where v = volume
m = mass
ρ = density
density of a rock = 45 g/mL
mass of rock = 855g.
The volume of the rock can be calculated as follows:
Volume = 855g /45g/mL
Volume = 19mL
Therefore, the volume of a rock with a density of 45 g/mL and a mass of 855g is 19mL.
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Two students (90.0 kg and 60.0 kg) on roller skates face-to-face push against each other. The 90.0 kg student moves at 5.0 m/s just after their hands lose contact. What is the velocity of the other student?
Given that,
Mass of student 1, m₁ = 90 kg
Mass of student 2, m₂ = 60 kg
Speed of student 1, v₁ = 5 m/s
To find,
The velocity of the other student.
Solution,
Using the conservation of momentum to find the velocity of the other student. Let it is v₂.
[tex]m_1v_1=m_2v_2\\\\v_2=\dfrac{m_1v_1}{m_2}\\\\v_2=\dfrac{90\times 5}{60}\\\\=7.5\ m/s[/tex]
So, the velocity of the other student is 7.5 m/s.
How much work is done on a 3.0 kg book that is pushed across the top of a table to the other side until it stops? Its initial speed is 1.4 m's.
Answer:
Work down = 2.94 N
Explanation:
Given:
Mass of book m = 3 kg
Initial speed v = 1.4 m/s
Find:
Work down w
Computation:
Work down = Kinetic energy
SO,
Work down = 1/2(m)(v)²
Work down = 1/2(3)(1.4)²
Work down = 2.94 N