Which of the following best represents potential energy being converted to kinetic energy?
1)a roller coaster starts at the top of a hill and then rolls down the hill.
2)a pitcher throws a baseball, and then the batter hits a homerun
3)a man jogs around the block and then stops to drink an energy drink
4)a woman peddles her bicycle across town and back again.

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency