A medicine ball is dropped from a height of 1 m. It strikes the ground with an energy of 50 J. What is the mass of the medicine ball?

The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of radiation. conduction. convection. insulation.

A moving car has kinetic energy. To bring the car to rest, you must decrease its kinetic energy to zero. The brakes do this work by applying a force over a distance. What effect would doubling the speed have on the braking distance?

Ultraviolet waves can; A - enable your body to produce vitamin D B - cause cancers C - cause skin damage D - all of the above

How is the information sent back to earth by the robots?

What is the relationship n which the ratio of the manipulated variable and the responding variable are constant

Why is plasma called the "fourth state of matter"? I've recently heard that plasma is sometimes referred to as the "fourth state of matter". Why is this? Why is it not the first, second or third?

Which of these would you include ina free body diagram for a bicycle-plus-rider taken together as the bicycle is being pedaled up the hill?

What are two possible uses of genetic engineering

How many joules are expended by a 70 kg man climbing up 6m of stairway? How much work is done if the climbing takes place on the surface of the moon? (Assume that the acceleration due to gravity on the moon's surface is 1.6 m/s2

A baseball flying through the air has kinetic energy because of its motion. true or false?