1. A welder draws 70 A of current and is run for 2 hours. What is the charge

that has passed through the welder?

If an object is in uniform circular motion, then it is accelerating towards the center of the circle; yet the object never gets any closer to the center of the circle. It maintains a circular path at a constant radius from the circle's center.

Two planets in space gravitationally attract each other. if both the masses and distances are doubled, the force between them is

How is the pressure of a gas related to its concentration of particles?

What is population density?

Scientists use satellites to measure the a. ocean floor depth. b. size of underwater features. c. sea-surface height. d. ocean's salinity.

Explain the relationship between motion and frame of reference.

Two students are looking at a brightly lit full Moon, illuminated by the reflected light from the Sun. Consider thefollowing discussion between the two students about what the spectrum of moonlight would look like.

When performing a battery load test, what should the load be set to?

If you push on a wall of a building what will happen

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.