A brick falls from a wall to the ground and it takes 5.67 s to hit the ground. How fan

did the brick fall?

Explain why a parachute would be useless if you went to the Moon?

What kind of substances diffuse most through a cell membrane

What are allotropes? Give an example.

A 1.0-kg ball on the end of a string is whirled at a constant speed of 2.0 m/s in a horizontal circle of radius 1.5 m. What is the work done by the centripetal force during one revolution

As heat is added to a substance undergoing a phase change, the temperature remains constant because the energy is being used to

What type of wave passes through the spring in the frog toy? Why?

Different kinds of substances have different properties of metals

Magma appears to be rising underneath the mid-oceanic ridges. a. True b. False

The energy required to crack a material

two punds of water vapor at 30 psia fill the 4ft3 left chmaber of a partitioned system. The right chmaber has twice the volume of the left and is initially evacuated.