Aperson jogs eight complete laps around a 400- m track in a total time of 14.0 min . calculate the average velocity, in m/s .

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp