A basketball rolls of a 0.70 m high desk and strikes the floor 0.25 m away from the base of the desk? How fast was the ball rolling?

Answers

Answer 1

Answer: 0.7/0.25=2.8m per second

Related Questions

Which of the following actions or events did not contribute to the Dust Bowl? Farmers in the Central U.S. had plowed grasslands to grow food crops to feed the increasing human population. They left the fields plowed and bare in the winter months when crops were not grown, and this left the soil exposed to wind. A long drought in the 1930s left the exposed soil especially dry due to the lack of precipitation. With the advent of pesticides, minerals in the ground were leached.
An electron traveling with a speed of 2.50 × 10^6 meters per second collides with a photonhaving a frequency of 1.00 × 10^16 hertz. After the collision, the photon has 3.18 × 10^−18 joule of energy. Calculate the original kinetic energy of the electron. [Show all work, including the equation and substitution with units.]
Images produced by a cathode ray tube result from induced emf True or false
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During a thunder storm, movement of water molecules within clouds creates friction which causes the bottom of the clouds to become negatively charged. This means that the bottom of the cloud and the ground begin to act like parallel plates. Once the electric field between the clouds and the ground becomes larger than 3.0 x 10^6 N/C, lightning will strike. a. If the bottom of the cloud is 150 m above the ground, determine the electric potential difference between the ground and the cloud.

Answers

the distance between the charges, or so called infinite charge plates is 150 m, the magnitude of the electric field is 3 x 10^6 N/C and we need to find the voltage, or potential energy, the electric field magnitude is defined as:

E = V/d

therefore, the potential is:

V = E * d

so we have:

V = 3 x 10^6 * 150 = 450 x 10^6 J/C (or volts)

that is the electrical potential difference.

Dark matter may explain _____.A.unexpected orbital velocities of stars in galaxies
B.the source of energy that fuels stars
C.the expansion of the universe
D.the origin of life
E.what came before the big bang

Answers

Answer: A.unexpected orbital velocities of stars in galaxies

Explanation:

Dark Matter makes up about 80% of matter in the universe. This matter does not emit light and hence, it is called dark matter as it cannot be observed directly.

The effect of the presence of the dark matter is unexpected orbital velocities of stars in galaxies. At the center, the orbital velocities are greater than those at the edge. Had there been no dark matter, the galaxy would have flown apart.

Dark matter may explain unexpected orbital velocities of stars in galaxies.

1. What conditions must exist in order for a force to do work on an object?

Answers

Energy? whether it is kinetic or potential, force usually requires some sort of energy to do work

A change in the thermal energy of an object is related to the object s specific heat, temperature change, and mass. TRUE or FALSE.

Answers

The statement: "A change in the thermal energy of an object is related to the object s specific heat, temperature change, and mass." is True. An object's total heat capacity is called heat capacity, and it is affected by the amount of thermal energy required to raise the temperature by 1 degree C.

Answer:

True

Explanation:

Edge 2022

The mass of ball A is 10 kilograms and the mass of ball B is 5 kilograms. If the initial velocity is set to 3 meters per second for each ball, what is the final velocity of ball B if the final velocity of ball A is 2 meters per second? Use the elastic collision equation to find the final velocity of ball B. Assume ball A initially moves from right to left and ball B moves in the opposite direction. Identify each mass, velocity, and unknown. Show your work, including units, and indicate the direction of ball B in your answer.

Answers

the awnswer is A i think

What does the Doppler Effect tell astronomers about the universe?

Answers

The doppler effect tells us that as an object moves away from another object, the wavelength increases, and vice versa. So, if the universe is expanding and things are moving away from where you are, the wavelength from the light source, such as a galaxy, would increase. Also, if the universe was contracting and things were getting closer to where you are, the wavelength of the light emitted from the galaxy would decrease

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