Answer:
F = 16 N
Explanation:
Given that,
Mass of the ball, m = 7 kg
Speed of the ball in circular motion, v = 3 m/s
The radius of the string, r = 4 m
We need to find the centripetal force of a ball on a string in circular motion. The formula for the centripetal force is given by :
[tex]F=\dfrac{mv^2}{r}[/tex]
Putting all the values in the above formula
[tex]F=\dfrac{7\times (3)^2}{4}\\\\=15.75\ N[/tex]
or
F = 16 N
Hence, the correct option is (c).
Calculate the force of gravity between two objects with a mass 1,000,000kg that are 10m apart
Answer:
F = 0.667 N
Explanation:
Given that,
Masses of two objects, m₁ = m₂ = 1,000,000 kg
The distance between masses, d = 10 m
We need to find the force of gravity between two objects. The formula for the gravitational force is given by :
[tex]F=G\dfrac{m_1m_2}{d^2}\\\\F=6.67\times 10^{-11}\times \dfrac{(1,000,000)^2}{10^2}\\\\=0.667 N[/tex]
So, the force of gravity between two masses is 0.667 N.
The gravitational force between the Sun and the Earth is about 3.5 x 10²² N.
What would be the value of the gravitational force if the distance between them were quadrupled?
Answer: 2.2 x 10^21
Explanation:
Two children are bouncing small rubber Ball. One child simply drops ball. At the same time, the second child throws a ball downward so that it has an initial speed of 10m/s what is the acceleration of each ball while in motion
The acceleration of each ball while in motion is the acceleration due to gravity, that is 9.81 m/s²
How to illustrate the information?Here one child simply drops a ball. The second child simultaneously launches a ball downward at a 10-meter-per-second initial speed.
In first case acceleration on the ball is the acceleration due to gravity, it should be noted that in the second case also acceleration on the ball is the acceleration due to gravity,
Therefore, only gravitational force is acting on both cases so their acceleration is the acceleration due to gravity. Therefore, the acceleration of each ball while in motion is the acceleration due to gravity, that is 9.81 m/s².
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estimate the value of resistances needed to make a variable timer for intermittent windshield wipers: one wipe every 15 s, 8 s, 4 s, 2 s, 1 s. assume the capacitor used is on the order of 3 μf .
The minimum value resistance is 330 kΩ and maximum value resistance is 5000 kΩ.
What is resistance?Resistance is encountered by an electron as it passes through the external circuit's wires and loads. The obstacle to the flow of charge is called resistance. An electron cannot travel in a straight line from one terminal to the next. Instead, a zigzag path is created by several collisions with stationary atoms in the conducting substance. The movement of the electrons is hampered by resistance. Resistance prevents the passage of charge, whereas the electric potential difference between the two terminals promotes it. The combined influence of these two factors determines the rate at which charge flows from terminal to terminal.
Calculations:
θ = R * C
15s --- R = θ / C = 15 / 3x 10^-6 = 5x 10^6Ω----- 5000 kΩ
8s------R = 8 / 3x 10^-6 = 2.7x 10^6 Ω ----------------2700 kΩ
4s------R = 4 / 3x 10^-6 = 1.3x10^6 Ω -------------------1300kΩ
2s------R = 2 /3x 10^-6 = 0.67x 10^6 Ω ------------------670 kΩ
1s -----R = 1 / 3x10^-6 = 0.33x 10^6 Ω---------------------------330 kΩ
Part A
Answer : 330 kΩ ( min)
Part B
Answer: 5000 kΩ (max)
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Which other element is most likely to be a nonreactive gas?
A. Argon (AI)
B. Nitrogen (N)
C. Hydrogen (H)
D. Boron (B)
Answer:
A. Argon
Explanation:
It is a noble gas, a group which is not reactive.
Derive a relation for the length of a rod at a given tempreture t 0c when l0 is its length at 0 0c
The relation for the length of road at a given temperature, L at t°c = L0(1 + αΔT)
When a rod is heated from 0°c to a temperature t°c, its length increases which is given by the following formula
ΔL/L0 = αΔT
Where ΔL = change in length = L- L0
Thus,
L-L0/L0 = αΔT
⇒ L-L-L0 = L0(αΔT)
⇒ L = L0 + L0(αΔT)
Or L = L0(1 + αΔT)
Here L is the length at temperature t°c
L0 is the length at 0°c
α = coefficient of thermal expansion
ΔT = change in temperature
Thus, the relation for the length of road at a given temperature, L at t°c = L0(1 + αΔT).
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ASAP WILL GIVE BRAINLIEST!!!
During a safety test, a car hits a wall and stops in 0.55 s. The net force on the car is 6500 N during the collision.
What is the magnitude of the change in momentum of the car?
Answer:
The change in momentum of the car is 3575 Kg.m/s
Explanation:
Impulse and Momentum
The impulse (J) experienced by the object equals the change in momentum of the object (Δp).
The formula that represents the above statement is:
J = Δp
The impulse is calculated as
J = F.t
Where F is the applied force and t is the time.
The car hits a wall with a force of F=6500 N and stops in 0.55 s. Thus, the impulse is:
J = 6500 * 0.55
J = 3575 Kg.m/s
The change in momentum of the car is:
[tex]\Delta p= J = 3575\ Kg.m/s[/tex]
The change in momentum of the car is 3575 Kg.m/s
Help please.
How long is between each phase of the moon?
Answer:
The Moon actually takes 27.3 days to complete a single orbit around the earth. The Moon takes 29.5 days to complete one phase cycle.
Hope it helps!
WHAT IS THE interelationship between environment and mineral
The interrelationship between the environment and minerals can be that when we do mineral extraction we may harm the environment.
Mineral extraction is generally known as mining. mining can be hazardous as well as beneficial to us. Mining can do damage to the natural environment. Mineral extraction can also reduce the underground water table. Mining techniques often need a larger and more expansive piece of land. Deforestation is a byproduct of mining, and the construction of mining regions necessitates the construction of roads and housing for mine personnel, and vegetation farms are frequently eliminated. The rising human population is wreaking havoc on the environment by spewing gas and dust into the atmosphere.Minerals can harm the land and water and permanently damage the natural landscape. But mining can have some positive impact on society, regions, etc. So, the interrelationship between the environment and minerals is deteriorating as one’s extraction will harm another.Know more about the impact of the mining process on the environment in detail from the given below link:
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a running person has a what you need. Mass of 60kg and a speed of 3.16m/s what is her kinetic energy?
Answer:
[tex]\boxed {\boxed {\sf 299.568 \ Joules }}[/tex]
Explanation:
Kinetic energy can be found using the following formula:
[tex]E_k=\frac{1}{2}mv^2[/tex]
where m is the mass and v is the velocity.
The mass of the person is 60 kilograms and the velocity is 3.16 meters per second
[tex]m= 60 \ kg \\v= 3.16 \ m/s[/tex]
Substitute the values into the formula.
[tex]E_k=\frac{1}{2} (60 \ kg) *(3.16 \ m/s)^2[/tex]
First, evaluate the exponent.
(3.16 m/s)²= (3.16 m/s) * (3.16 m/s) = 9.9856 m²/s²[tex]E_k=\frac{1}{2}(60 \ kg ) (9.9856 \ m^2/s^2)[/tex]
Multiply 60 kg by 9.9856 m²/s²
[tex]E_k=\frac{1}{2} (599.136 \ kg*m^2/s^2)[/tex]
Multiply 599.136 kg*m²/s² by 1/2, or divide by 2.
[tex]E_k=299.568 \ kg*m^2/s^2[/tex]
1 kg*m²/s² is equal to 1 Joule Therefore, our answer of 299.568 kg*m²/s² is equal to 299.568 Joules.[tex]E_k= 299.568 \ J[/tex]
The running person has a kinetic energy of 299.568 Joules.
Solution:
We know that, Kinetic energy(kE)= 1/2×m×v^2
By applying formula,we get
Or,KE=1/2×60×3.16^2
Or,kE=299.57j
So,her kinetic energy is 2999.5j
A toy doll and a toy robot are standing on a frictionless surface facing each other. The doll has a mass of 0. 20 kg, and the robot has a mass of 0. 30 kg. The robot pushes on the doll with a force of 0. 30 n. The magnitude of the acceleration of the robot is.
By the force, the acceleration of robot is 1.5 m / s².
We need to know about force to solve this problem. Force will proportional to mass and acceleration. It can be written as
F = m . a
where F is force, m is mass and a is acceleration
From the question above, we know that
m = 0.2 kg
F = 0.3 N
By substituting the parameters, we know that
F = m . a
0.3 = 0.2 . a
a = 0.3 / 0.2
a = 3/2
a = 1.5 m / s²
Hence, the acceleration of robot is 1.5 m / s².
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A car weighing 12,000 N is parked on a 36° slope. The car starts to roll down the hill. What is the acceleration of the car?
Given that,
Weight of a car, W = 12,000 N
It is parked on a 36° slope.
To find,
The acceleration of the car.
Solution,
Let m be the mass of the car. Using formula for weight of an object.
W = mg
[tex]m=\dfrac{12000}{9.8}\\\\=1224.48\ kg[/tex]
Let a be the acceleration of the car. Using second law of motion as follows :
[tex]a=\dfrac{F_{\text{parallel}}}{m}\\\\=\dfrac{F\sin\theta}{m}\\\\=\dfrac{12000\times \sin(36)}{1224.48}\\\\=5.76\ m/s^2[/tex]
So, the acceleration of the car is [tex]5.76\ m/s^2[/tex].
An alien spaceship traveling at 0.600 c toward the Earth launches a landing craft. The landing craft travels in the same direction with a speed of 0.800 c relative to the mother ship. As measured on the Earth, the spaceship is 0.200 ly from the Earth when the landing craft is launched.(c) What travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship?
The travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship is 4.5*10^6m/s.
To find the answer, we have to know about the Lorentz transformation.
What travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship?It is given that, an alien spaceship traveling at 0.600 c toward the Earth, in the same direction the landing craft travels with a speed of 0.800 c relative to the mother ship. We have to find the time travel for the landing craft to reach the Earth as measured by the aliens on the mother ship.
It is given that; the spaceship is 0.200 ly from the Earth when the landing craft is launched.We have the expression for time travelled as,[tex]t=\frac{d}{v}[/tex]
where; d is 0.2 light years, and the value of v will be 0.8c+0.6c
[tex]t=\frac{0.2ly}{0.8c+06c} =\frac{0.2*9.46*10^{15}m}{1.4*3*10^8s} =4.5*10^6m/s[/tex]
Thus, we can conclude that, the travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship is 4.5*10^6m/s.
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A log with a mass of 90.0 kg falls off a cliff with a height of 31.2 m cliff. Assume g = 9.8 ms-2 What energy transformation occurs?
Answer:
kinetic energy
Explanation:
How does hydropower generate electricity?
Answer:
the water spins the wheel wiche gives energy.
Explanation:
a Model Changing classes, you walk 20.0 m down a
hall, turn left, and then walk 10.0 m down another hall. Define a
coordinate system and sketch the displacement vector. Also, sketch the
displacement components, and then determine the vector's magnitude.
Answer:
Explanation:
potato :D
What is the fault-current circuit breaker? Describe its function.
Answer:
A circuit breaker is a switching mechanism that interrupts the current that is irregular or fault. It is a mechanical system that interferes with high magnitude (fault) current flow and also performs a transfer operation. Hope this helps :)
Explanation:
Answer:
A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by an overcurrent or short circuit.
Explanation:
Its basic function is to interrupt current flow after protective relays detect a fault.
A girl throws a 2 kg rock with a net force of 6 N. What is the acceleration of the rock?
8 m/s2
0.33 m/s
2 3 m/s2
12 m/s2
Answer:
3 m/s2
Explanation:
Took the test
A 12kg object experiences a net force of 120 N. What is the acceleration will this object experience?
Answer:
a = 10m/s^2
Explanation:
Recall that F=ma, therefore, to find acceleration, we need to rearange the equation in such a manner that it would equal acceleration:
[tex]F=ma\\\frac{F}{m} =a\\\\\frac{120N}{12kg}=a\\10m/s^2=a[/tex]
What is a Biome?
Define biome:
Each biome consists of many ___________________ whose _______________ have adapted to the
small differences in climate and the environment inside the biome.
To understand a world biome you need to know: (list the 4 things below)
1.
2.
3.
4.
Answer: Each biome consists of many habitats whose ecosystems have adapted to the small differences in climate and the environment inside the biome.
1. Most Plant and Animal Species Are Found in the Rainforest Biome.
2. Rainforest Plants Help in the Fight Against Cancer
3. Not All Deserts Are Hot.
4. One-Third of the Earth's Stored Carbon Is Found in Arctic Tundra Soil.
Biome is a regional or global land area that is characterized by the plants, animals and climate in that area.
Each biome consists of many __habits__ whose _ecosystem_ have adapted to the small differences in climate and the environment inside the biome.
To know a biome following things are important:-climatehabitatanimal and plant adaptation human activity.How many biomes are there?Based on temperature and rainfall there are six major biomes:
DesertTundraGrasslandConiferous forestDeciduous forestTropical forestTo know more about biomes here
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what make molecules
Answer:
Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. ... The element helium is a one-atom molecule.
Answer:
Molecules are formed when two or more atoms of an element chemically join together.Explanation:
Please mark my answer as a brainliest ❤❤❤Suppose you are observing a binary star with a telescope and are having difficulty resolving the two stars. You decide to use a colored filter to maximize the resolution. (A filter of a given color transmits only that color of light.) What color filter should you choose? (a) blue (b) green (c) yellow (d) red
The color filter that a person need to choose is option (a) blue.
Why choose the blue color?The reduction of the wavelength of the light is one that tends to make the aperture to be bigger if it is said to be relative to the light wavelength, by rising the resolving power. So, one need to choose a blue filter.
The Blue light filter is one that can act by lowering the amount of blue light that is shown on the screen of telescope device.
note that the blue light can tends to suppress the creation of melatonin thus making it to be filtering it out.
Therefore, based on the above, The color filter that a person need to choose is option (a) blue.
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Calculate the average acceleration for a car moving linearly and braking to a stop from 30 m/s in 5 seconds.
The average acceleration of the car moving linearly is 6 m/s².
What is acceleration?
Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity.
a = Δv/Δt
where;
Δv is change in velocityΔt is change in time of motionThe average acceleration of the car moving linearly is calculated as follows;
a = 30 m/s / 5 s
a = 6 m/s²
Thus, the average acceleration of the car moving linearly is 6 m/s².
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HELPPPPP
Find an article about recent findings in physics from a reputable source. A quick Internet search can help you find good sources for physics-related articles. If you're unsure about the validity of your source, consult your teacher.
After you've read your article, complete the following in a post on this page:
Summarize it in 1-2 paragraphs.
In an additional paragraph, discuss any evidence presented in the article. Use the following questions to help guide you:
What, if anything, does this evidence support? Is it relevant to the author's main idea(s)?
Is a claim made or a position taken on a scientific issue? If so, to what degree does the evidence and reasoning in the text support that claim?
Cite your source.
Answer: hope this helps
wrote this last year
Explanation:
Why it is important to study the universe
There are many reasons why it is important to study the universe, such as we would know nothing about zodiac signs, planets, why and how the dinosaurs died. The universe is an interesting place, and so much of it hasn't been explored. NASA (National aeronautics and space administration) is an agency that is responsible for development and research of vehicles and activities in space.
The eight planets in your solar system are:
Jupiter~ named after Zeus the king of the gods.
Mars~ Named after the Roman god of war.
Uranus~ named after the Greek god of the sky ( Zeus. )
Mercury~ named after the Roman messenger god.
Venus~ named after the Roman goddess of love and beauty.
Saturn~ named after the Roman god of agriculture and wealth.
Earth~ is the only planet not named after anybody but its nickname is “the blue planet”
Now if we did not study the universe then how would we know all of that? The universe is a BIG place and we are like Preons ( particles that are the building block to Quarks, Quarks are the particles in protons and neutrons ) compared to the universe.
Did you know that they have discovered an ocean on Jupiter? The ocean on Jupiter is 11 kilometer deep. It has also been discovered that it rains diamonds on Jupiter and Saturn. One thing about the universe that is interesting to me is our moon, the moon comes in many colors such as:
Blue moon
Pink moon
Red moon
Yellow moon
Orange moon
There is also different types of solar eclipse:
Total eclipse~
Partial eclipse~
Annular eclipse~
The moon also has different phases as well:
Waning crescent
Third quarter
Waning gibbous
FULL MOON
Waxing gibbous
First quarter
Waxing crescent
Here is a fun fact about the moon, the moon is neither a star nor a planet, it is a satellite object. The first man on the moon was Neil Armstrong, and he was a part of Apollo 11, and Gemini 8. One of my favorite quotes from him is “ Mystery creates wonder and wonder is the basis of man’s desire to understand.” Did you know that if you go to Death Valley, CA you can see the milky way from earth. One of the things I love about the universe is that it is full of mysteries. Lots of things we don't know about the earth and there are a lot of things we would not know if we didn't study the universe. Zodiac signs are the groups we put everyone in. These groups we are put in are deciphered by what month we are born in. The zodiac signs are what groups we are in according to the universe.
A boat travels 12. 0 m while it reduces its velocity from 9. 5 m/s to 5. 5 m/s. What is the magnitude of the boat’s acceleration while it travels the 12. 0 m?.
The calculated acceleration is -2.5 m/s²
In accordance with the data in the question, we have:
Initial speed (u) is 9.5 m/s.
Final speed (v): 5.5 m/s
(s) = distance traveled (12 m).
Calculate the boat's acceleration, please. The third equation of motion yields v²=u²+ 2as, where v stands for final velocity.
u stands for beginning speed.
A stands for acceleration.
s stands for distance.
(5.5)²-(9.5)²= 2*a*12
30.25-90.25=24*a
-60=24*a
a=-2.5 m/s⁻²
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How much force is required to accelerate an 8kg mass at 5m/s^2 if there is 14N of friction
Answer:
Explanation:
How much force is required to accelerate an 8kg mass at 5m/s^2 if there is 14N of friction.
Answer:
54 N
Explanation:
By Newton's second law the force acting on an object is related to its mass and acceleration
F = m x a where
where m = mass of the object and a is the acceleration
Here m = 8 kg and a = 5m/s² so
F = 8 x 5 =40 Newtons (measure of force)
But there is an opposite force due to friction of 14 Newtons
So net force required to overcome this friction and accelerate the object of mass 8kg to 5m/s² = 40 + 14 = 54 Newtons
The second create the bottom of the table is called the
Answer:i don't understand
Explanation:
a diver initially moving horizontally with speed v dives off the edge of a vertical cliff and lands in the water a distance d from the base of the cliff. how far from the base of the cliff would the diver have landed if the diver initially had been moving horizontally with speed 2v?
The time(t) in the air for a horizontal projectile is dependent on the distance travelled(d) and its initial velocity(v).
i.e. t = d/v
Since the time for the projectile in the air is same at both v and 2v, the distance at speed 2v will be double than that of the distance at speed v.
An object that is in motion in the air with no force other than gravity, then the path travelled by the object is called as projectile.
The driver must have landed to the distance 2d from the base of the cliff, when he dives with the speed 2v.
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Which of the following is the standard (SI) unit of temperature?
Kelvin (K)
Celsius (C)
Farrenheit (F)
None of these
Kelvin (K)
The kelvin (K) is the base unit for temperature of the SI. Kelvin is called the absolute temperature scale because it does not use degrees.
calculate the velocity (in m/s) of an ocean wave that has a wavelength of 50 meters and a frequency of 0.1 hz.
The ocean wave velocity is 5m/s.
What is wave velocity?
Wave speed commonly refers to velocity, but velocity actually means both speed and direction. A wave's velocity is equal to its wavelength times its frequency (the number of oscillations per second) and is independent of its intensity.
When a point in a rigid body oscillates, both transverse waves (waves in which the point oscillates transversely to the direction of travel) and longitudinal waves (waves in which the point oscillates in the same direction as the direction of travel) are emitted at the same frequency. Longitudinal waves are random, with longer wavelengths traveling faster. Seismic waves, therefore, consist of both longitudinal (P, primary) and transverse (S, secondary) waves and travel through the Earth at two velocities.
Wave velocity is related to wavelength and frequency by the following equations:
Velocity = wavelength x frequency
Using the above formula, we can easily calculate the ocean wave velocity as follows:
Velocity = 50 x 0.1
Velocity = 5m/s
From the calculation above, we know that the ocean wave velocity is 5m/s.
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