Which of these is a pure substance?

A. cake mix

B. ocean water

C. 10 carat gold

D. solid gold

Draw a distance over time graph of a dog that is tied to a 4 foot rope and travels in 1 complete circle

Are sound waves transverse or longitudinal?

Give an example of how electromagnetic energy can cause changes in matter.

When a hypothesis is proven wrong, scientists often begin by revising the. After that, it's common for scientists to redesign the.

Part of the solar radiation entering the atmosphere about ___ actually reaches the earth's surface

Two objects have the same momentum. Do the velocities of these objects necessarily have (a) the same directions and (b) the same magnitudes? Give your reasoning in each case.

If you keep voltage constant and increase resistance resistance, what happens to current?

A scene in a movie has a stuntman falling through a floor onto a bed in the room below. The plan is to have the actor fall on his back, but a researcher has been hired to investigate the safety of this stunt.

During energy transformation, all energy systems: are a. 100 percent efficient b. lose energy c. gain heat energy d. create energy

An apple with a mass of 0.95 kilograms hangs from 3.0 meters above the ground. What is the potential energy of the apple