Alexander has a mass of 70 kilograms. his apartment is on the second floor. 5 meters yo from ground level. How much work does he do against gravity each time he climbs the stairs to his apartment.

A charge of 0.14 C is moved from a position where the electric potential is 20 V to a position where the electric potential is 50 V. What is the change in potential energy of the charge associated with the change in position?

Dante uses 14 J of work to lift a weight for 30 seconds. How much power did he use?

What is the term for the total radiation that is reflected by a surface?

Why is platinum used sparingly in technological applications?

A toy car engine pushes it forward at a constant speed. what happens if the force provided by the engine decreases? A. the toy car speed remains constant B. the toy car mass mass increases C. the toy car gains inertia D.

If it has enough kinetic energy, a moleculeat the surface of the Earth can escape the Earth's gravitation. The acceleration of gravity is 9.8 m/s2, and the Boltzmanns' constant is 1.38066*10-23 J/K.

True or False. Alcohol is toxic to most fruit flies, but fruit flies that metabolize alcohol quickly survive alcohol exposure better than normal metabolizers.

Aerobic exercise is exercise where oxygen is not present. Question options: True False

The force between a pair of. 005 charges is 750 N. What is the distance between them?

A perpetual motion machine can never be built because it is not possible to eliminate A) Momentum B) Inertia C) Elasticity D) Friction