Astone is dropped from a bridge 45 meters above the surface river. it takes the stone 4.6 seconds to reach the water surface. find the average velocity of the falling stone.

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

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.