The amount of energy added or removed to change the state of a substance between liquid and gas with no change in temperature.

-latent heat of fusion

-latent heat of vaporization

Which statement best describes a bar magnet? A. It's always on. B. It's on when there is an electric current. C. It's on when it's near another magnet. D. It's on when it's touching another magnet.

Resources such as sunlight, fresh air, soil plants animals and water are known as resources

Consider a locomotive and the rest of a freight train to be a single object. Suppose the locomotive is pulling the train up a hill.

A 7.2 m long ramp is set at an angle of 42 degrees with the floor. An 11kg box is pushed up the ramp. What is the change in GPE of the box? (Answer is 340J, but how do you get that?)

A common prism or grating shows the solar spectrum to be a rainbow of colors. But if you spread the spectrum out enough you begin to see other things. What are they?

How was the water filtered to remove debris and living organisms?

What causes physical vibrations in transformers at twice the frequency of the AC power involved.

Projectile motion is a combination of which two types of motion? parabolic and curved straight and diagonal horizontal and vertical constant and linear

If a mass of a material is 100 grams and the volume of the material is 15 cm3, what would the density of the material be?

After three half-lives of an isotope, 1 billion (one-eighth) of the original isotope's atoms still remain in a certain amount of this element. How many atoms of the daughter product would you expect to be present?