In a perfect vacuum, light waves travel at 300,000 kilometers every second. When light waves travel through materials, such as air, they

A. speed up

B. slow down

C. increase in amplitude

D. Heat up

Amber moves from her desk to the door in 17 seconds. Her speed changes from rest to 5 m/s. What is Amber's average acceleration?

Which of the following is true about free energy? A. It is all the energy that a molecule contains B. The free energy change of a reaction is dependent on the reaction path C. The free energy change of a reaction is dependent on the enzyme D.

Overtones show up at approximately which two sets of wavenumbers?

What is the weight of a 1-kilogram brick resting on a table?

If the moon were 2 times closer to earth than it is now, the gravitational force between earth and the moon would be

Three light bulbs are wired in series. What happens if one of these light bulbs burn out

How do you distinguish a pure substance from a mixture?

Does the size of the particles change as the substance changes state?

What is the Z number of an atom with 9 protons, 8 neutrons, and 7 electrons? 7 8 9 16 17

What is the most dense crust