How many protons are in an element with an atomic number of 8 and a mass number of 18?

18

10

8

3

When two ions with the same charge come together, their electric fields will A. bend towards each other B. bend away from each other C. nothing will happen

In the 1980's, Congress authorized the U. S. Department of Energy to build the WIPP facility in the Chicuahuan Desert in New Mexico. What is the purpose of WIPP?

How many nanoseconds does it take light to travel a distance of 1.70km in vacuum?

As the temperature of an object rises, so does the ... kinetic energy of the object. mass of the object. thermal energy of the object. potential energy of the object.

Static electricty is the study of ... A buildup of charge B electric discharges C electric fields D all of the above

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?