A ball is thrown upward from the ground with an initial speed of 15.6 m/s; at the same instant, another ball is dropped from a building 20 m high. after how long will the balls be at the same height above the ground?

Compute the acceleration of gravity for a given distance from the earth's center, distcenter, assigning the result to accelgravity. the expression for the acceleration of gravity is: (g * m) / (d2), where g is the gravitational constant 6.

1. potential energy:gravitational as A) elastic:potential energy B) mechanical:kinetic energy C) kinetic energy:sound energy D) gravitational energy:mechanical 2. 2) A pole vaulter, mass 65 kg, pushes off and attains a height of 7 meters.

What provides energy to move electrons and generate an electric current? A. an insulator B. a voltage source C. a conductor D. a wire

Wich of the following celestial bodies is most likely to have many craters

How does the speed of waves vary in different media? Radio waves are used to transmit verbal messages through space. Sound waves are transferred by the compression of particles.

Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the asteroid with a hammer. What happens to you in this process?

You walk forward at 1.5 m/s for 8s. Your friend decides to walk faster and starts out at 2.0 m/s for the first 4 s. Then she slows down and walks forward at 1.0 m/s for the next 4s. Make a distance-time graph of your motion and your friend's motion.

If the coolant in a refrigerator was not compressed back into a liquid after it flowed through the refrigerator what would happen

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i. e, what is the motion's frequency?

Which characteristic best describes how nuclear decay differs from nuclear fission?