If element X has 42 protons, how many electrons does it have?

Which is the SI base unit for mass?

If the potential energy of a box is 600 joules because it is stored on a shelf at a position of 4 meters, what is the object's mass?

Determine an expression for the electric potential V on the sphere's surface. Express your answer in terms of some or all of the variables R, q. Use k for the constant from Coulomb's law.

Explain how fossil fuel use in the US makes us vulnerable to the demands of foreign countries.

Which of the following factors affects the pressure of an enclosed gas? A) temperature B) volume C) number of particles D) all of the above

Which reaction obeys the law of conservation of mass?

Smaller bits of rock that pass through the atmosphere and slam into Earth's surface are called a. asteroids. b. meteors. c. meteorites. d. meteoroids.

What is the conversion from 1.2 mm to m

Which sentence contains italicized words that are used as an infinitive phrase? A. Kelly went to the grocery store. B. Tom went there for some flour. C. Mark wanted to go, but not today. D. Jane parked her car behind a truck.

The difference in electric potential between a thunder cloud and the ground is 1.53 108 V. Electrons move from the ground which is at a lower potential to the cloud which is at a higher potential.