A 9kg sled is being slid across snow. The coefficient of friction is 0.30. What is the frictional force between the sled and the snow?
A)2.7N
B)2.7
C)26.49
D)26.49N

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

What causes the formation of ocean currents?

The ability to make things happen is also called a. heat b. force c. matter d. energy