Which simple machines combine to make scissors? a. one lever and two wedges b. two levers and two wedges c. one inclined plane and two wedges d. two inclined planes and two wedges

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

In addition to gravity, what is the other predominant force that affects the motion of a pendulum?