Which of these is an example of a chemical change?

a. leaving cheese out to get moldy

b. smelling sprayed perfume

c. feeling ice melt on your skin

d. crushing ice with a hammer

Why does the moon cycle from new moon to full moon?

Which of the following can be a component of soil?

I would enjoy talking to customers all day

List three things you have done today that used kinetic energy.

Which statement describes the motion of a mass on a spring? A. It exhibits constant velocity motion. B. It exhibits simple harmonic motion. C. It exhibits circular motion. D. It exhibits only upward motion.

The state of matter that has particles that slide by one another

Temperature is usually measured in degrees with a (n)

Two lab carts are pushed together with a spring mechanism compressed between them. Upon release, the 5.0 kg cart repels one way with a velocity of 0.12 m/s. The 2.0 kg cart goes the other way. At what velocity does it travel?

A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15.0 N. What is the force that the pin exerts on the bowling ball?

an electric clothes dryer has a resictance of 16 Ohms it drawes 15 A of current what is the voltage in volts of the wall outlet that it is pluged into