What is the temperature at which a substance melts or freezes?

A 4,000-kg car traveling at 20m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

Is white a color or a book publisher?

If you had a trapped gas and continued to cool it until the lowest possible temperature is reached the temperature is called

This force involves the attraction between objects with mass. a. strong nuclear b. gravitational c. electromagnetic d. weak nuclear

The velocity of sound in air is 332 m/s. If the unit of length is km and the unit of time is hour, what is the value of velocity?

A two stage rocket leaves its launch pad moving vertically with an average acceleration of 4 m/s2. at 10 s after launch the first stage of the rocket (now without fuel) is released.

A liquid filled sealed system has cylinders with movable pistons on each end. The face of one piston has an area of 5 cm². The other piston has an area of 500 cm² and is supporting a weight of 2 kN on it.

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

A cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's top speed in m/s?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.