True or false air contains 78 percent hydrogen, 21 percent oxygen, and 0.03 percent carbon dioxide

The formula d = rt gives the distance d traveled in time t at rate r. A train travels 163.2 miles in 2.4 hours, traveling at a constant rate. What is the train s rate of travel?

What is a simple pendulum?

What is the direction of the electric force exerted by paperclip 1 on paperclip 2?

The Tapeats Sandstone is made of sand-sized rock pieces and contains fossils of trilobites. Trilobites were marine organisms similar to modern-day horseshoe crabs.

What is an Exothermic Reaction? What is an Endothermic Reaction?

A train's mass is 18181.81 kg. What is its weight?

A body of mass 20kg is set in motion by two forces 3N and 4N acting at right angles to each other, determine the magnitude of the acceleration

Gerry and Lena work in a modern physics laboratory and study nanotechnology, which is a new type of technology that allows control over individual particles as small as molecules or atoms.

What can you do to reduce the electric uses within your home?

What is the scientific name given to potato