When a simple machine multiplies force, it decreases

a. potential energy.

b. distance moved.

c. both

d. neither?

If light travels at 3 · 108 m/s and its frequency is 6 · 1015 Hz, then its wavelength is: A) 10 · 107 m B) 5 · 10-8 m C) 5 · 10-7 m D) 10 · 10-7 m

Occupants in a single space shuttle in orbit feel weightless. describe a scheme whereby occupants in a pair of shuttles (or even one shuttle and another massive object in orbit) would be able to use a long cable to continuously experience a

Substance A will not dissolve in water. What can be said about substance A? It is nonpolar. It is polar. It is saturated. It is unsaturated.

What minimum speed is required for the ball to clear the 0.90-m-high net about 15.0 m from the server if the ball is "launched" from a height of h = 2.70 m?

Which of the following is an acidic pH? A. 6.0 B. 7.0 C. 8.0 D. 9.0

Two workers pull horizontally on a heavy box but one pulls twice as hard as the other. The larger pull is directed at 25.0 west of north and the resultant of these pulls is 430.0N directly northward.

What would happen to an object in orbit without gravity pulling down?

The waters of a lake will be most layered in which season A. winter B. spring C. summer D. fall

Which of the following is an example of an archery contestant showing good precision but poor accuracy? O A. Hitting a bulls-eye once and then missing a second time O B. Hitting a bulls-eye every time O C.

List and describe two ways currents affect life on earth