Describe the shape and form of a sound wave(the type of wave). Give a physical example (an object) that represents sound traveling.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Which type of reaction is shown in this energy diagram? energy products activation energy reactants time o a. endothermic, because energy is released to the surroundings o b. exothermic, because energy is absorbed from the surroundings o c. exothermic, because energy is released to the surroundings o d. endothermic, because energy is absorbed from the surroundings