Why is the depletion of hydrogen in the core of a star such an important event?

How will the mass of a rusted iron nail compare with the mass of the same nail before it rusted? A. The two masses will be the same. B. The rusted nail will have the greater mass. C. The unrusted nail will have the greater mass. D.

You move a 75-kg box 35 m. This requires a force of 90 N. how much work is done while moving the box?

Is gravity a property of mass?

Anna needs to move a box of paperback books across the room. If she applies a force of newtons to the box, what is the magnitude of the force exerted by the box on Anna?

A bowling ball is pushed with a force of 22.0N and accerlates at 5.5 m/s square. What is the mass of the bowling ball A - 4.0 kg B-0.25 kg C-25 kg D-4.00 kg

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova

When a car turns a corner on a level road, which force provides the necessary centripetal acceleration? 1) gravity 2) normal force 3) air resistance 4) tension 5) friction

Use Newton's universal law of gravitation to explain why gravity is greater on Earth than on Mercury.

What is a magnetic field and how does it interact with magnetic materials?