The law of conservation of energy states that

A. energy cannot be converted from one from to another

B. energy cannot be created or destroyed

C. energy resources must be used efficiently

D. energy is constantly being lost to friction

In a given medium, all sound waves move: A. in the same direction. B. with the same amplitude. C. with the same frequency. D. with the same speed.

A 2.00-kilogram object weighs 19.6 newtons on earth. if the acceleration due to gravity on mars is 3.71 meters per second2, what is the object's mass on mars

Which of these statements about water is true

Quickly spinning the handle of a hand generator, Kevan is able to light three bulbs in a circuit. When he uses two batteries instead of the generator, the bulbs are very dim.

Which of the following is true about the weight of an object? It remains same for the object. It cannot be measured accurately. It is a force acting on the object. It is always less than the mass of the object.

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.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N