A man pushes down on a lever with 45 N and the lever moves 1.5 meters. The other end of the lever lifts a 87.6 N box. 4 meters. What is the efficiency of the lever?

A tabletennis ball strikes an at-rest bowling ball. The table tennis ball is moving with moderate speed. What is the likely result?

Sarah added sugar to her iced tea, but it is not dissolving very quickly. Which can Sarah do to make the sugar dissolve faster? Add more sugar. Heat the tea. Add more ice.

What is the distance from rest to crest, or from rest to trough, called?

You're using a rope to pull a sled at constant velocity across level snow, with coefficient of kinetic friction 0.050 between sled and the snow. The sled is loaded with physics books, giving a total mass of 39 kg 1.

A 7.00-g bullet, when fired from a gun into a 1.00-kg block of wood held in a vise, penetrates the block to a depth of 8.00 cm. This block of wood is next placed on a frictionless horizontal surface, and a second 7.

If a small child were to release a balloon into the atmosphere, what would happen to the size of the balloon as it makes it way higher in the sky?

Is a aluminum pie plate an element

The age of the solar system can be established by radioactive dating of

What changes in the original atom are expected as a result of this natural phenomenon

What is a descriptions of an animal cell's nucleus?