Why does the volume of a balloon decrease when the temperature is decreased? Explain what happens to the gas particles in the balloon.

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.