An electromagnetic wave traveling through a vacuum has a wavelength of .15 meter. what is the period of this electromagnetic wave?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.