In order for fusion to begin during the birth of a star, there needs to be a certain amount of A. mass. B. charge. C. density. D. volume.

A toy boat of mass 1.0 kg is pulled by a child using a string at an angle of 45 o to the surface of the water with a constant force of 2.0 N. The boat accelerates constantly from rest to 0.20 m/s in 0.50 s.

Efraction occurs when a wave changes its A) color. B) frequency. C) intensity. D) speed.

An archer shoots an arrow at a 75.0 m distant target; the bullâs-eye of the target is at same height as the release height of the arrow. (a) at what angle must the arrow be released to hit the bullâs-eye if its initial speed is 35.

If you wanted to soundproof a room what insulator would you use

A slingshot shoots a marble. It travels at an average speed of 15 m/s for 12 seconds before hitting it's target. How far does it travel?

The main source of organic matter in soil is

Patrol on her TV to make the sound louder or softer. Which property of waves is Sasha's volume control changing? A) amplitude B) wave period C) wavelength D) wave speed

What describes an endothermic reaction

1. A woman driving in a car at 21 m/s pushes down on the gas pedal. 6 seconds later, she is moving at 36 m/s. What was her average acceleration?

Light from the sun reaches earth in about 8.3 minutes the speed of light is 3.00*10^8 m/s what is the distance from the sun to earth?