Which subatomic particle has a positive charge?

A) electron

B) neutron

C) nucleus

D) proton

When you are travelling downhill on a roller coaster, you experience a light feeling in your stomach. why?

How can you produce more power than an excavator?

Ideal meters problem. What internal resistance is ideal for a voltmeter? What internal resistance is ideal for an ammeter?

Tools to use to find volume of regular shape

Which best describes friction int the context of newtons laws? 1. a kind of tape that holds things together 2. the force that opposes the relative motion of two objects in contact with and sliding past each other 3.

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?