Which is a result if using a machine

9. The model of the universe that suggests that the sun is the center of the universe was first developed by A. Copernicus B. Brahe. C. Kepler. D. Ptolemy.

How many neutrons does carbon have

Two balls have a race over a distance of 20.0 meters. The red ball travels at a constant velocity while the blue ball starts at rest and has a constant acceleration. For this problem set the blue ball's acceleration to be 3.30 m/s2.

The sum of all the potential energy and kinetic energy is an object is equal to its A-thermal energy B-kinetic energy C-potential force D-force

Two students are having a discussion about the Moon. The first student claims that we always see only one side of the Moon and that the other side is the "dark side." This student also further asserts that the dark side of the Moon is always dark.

Can rocks be weathered by wind and chemicals in the air

1. if you rub a neutral glass rod with silk, the silk acquires a negative charge. if you rub a neutral glass rob with a rubber rob, the rubber rod acquired a negative charge.

What's a scientific inquiry

Calculate work If force of 50 Newton's and distance is 6 meters.

What heats up hot chocolate faster? milk or water?