In order to change water from a solid to a liquid, energy must be

a. removed

b. created

c. added

d. destoryed

The pressure of gas in a cylinder is 70 kilopascals. if the volume of the cylinder is reduced from 8.0 liters to 4.0 liters, what should be the pressure of the gas in the cylinder?

Create a sketch that shows the particles of matter in two substances that differ in density. Label the sketch to show which substance has greater density.

In two grams of element x combine with 4 grams of element y to form compound xy how many grams of element why would combined with 43 grams of x to form the same compound

Which drawing would correctly show the magnetic field around a bar magnet? A. curved lines from the north pole of the magnet to the south pole B. curved lines near the center of the magnet C.

Matter without a definite volume or shape is called a

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False

A baseball has mass 0.145 kg. (a) If the velocity of a pitched ball has a magnitude of and the batted ball's velocity is in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.

A long distance runner has an average speed of 4m/s during a race. How far does the runner travel in 20 minutes?