6 A charge of

4.5 x 10 90 is located

3.2m from a

charge of - 2.8x10

Find d electrostatic

force exerted on the

charge on the other

A physics instructor wants to project a spectrum of visible-light colors from 400 nm to 700 nm as part of a classroom demonstration.

A weight lifter performed 200 J of work lifting a weight in 2 seconds. what was his power

A certain hydraulic system is designed to exert a force 100 times as large as the one put into it. (a) What must be the ratio of the area of the slave cylinder to the area of the master cylinder

Consider a large truck and a small car driving up a straight, steep hill. The truck is moving at 60 miles per hour and the car at 30 miles per hour. Assuming that the speeds are constant, which of the two vehicles experiences a larger net force?

A student observes that a paper clip floats on water in a cup even though the paper clip is denser than water. When the student mixes a drop of dish detergent into the water, the paper clip sinks to the bottom of the cup.

A lightning bolt carrying 30,000 A lasts for 50 micro-seconds. If the lightning strikes an airplane flying at 20,000 feet, what is the charge deposited on the plane?

David walks 3 km north, and then turns east and walks 4 km

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: - 5.92; - 4.44; - 2.96; - 8.88. The units are arbitrary.

A person riding on the roof of a freight train throws a ball forward. (a) If we ignore air drag and relative to the ground, is the ball moving faster or slower when the train is moving than when it is standing still?

Determine which factors will increase the reaction rate and which factors will decrease te reaction rate.