Describe what a reactant is

1) Which of the following explains why a bicycle uses a gear? A.) The gear increases the effort force needed. B.) The gear increases resistance force. C.) The gear decreases effort force. D.) The gear decreases resistance force.

What type of cell must take up carbon dioxide to stay alive

A (n) 0.5 kg soccer ball approaches a player horizontally with a speed of 10.6 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 19.9 m/s.

An object has a weight of 5.10 N at sea level, where the acceleration is 9.81. What is the acceleration due to gravity on the object if it is placed in a spaceship 1,000km above sea level, where gravity exerts a force of 3.81N on the object

A spelunker is surveying a cave. She follows a passage 180 m straight west, then 290 m in a direction 45∘ east of south, and then 280 m at 30∘ east of north. After a fourth unmeasured displacement, she finds herself back where she started.

A device that changes thermal energy into mechanical energy

You and your roommate are moving to a city 380 mimi away. Your roommate drives a rental truck at a constant 55 mi/hmi/h, and you drive your car at 65 mi/hmi/h. The two of you begin the trip at the same instant.

Which planet is 92,897,000 miles from the sun?

Stretching or drawing a solid into a wire is which of the following physical properties A) ductility B) solubility C) malleability D) conductivity

How well does the infographic ""Plastics in the Ocean"" present a solution to the problem it describes?