1) The diagram below shows a 0.1-kilogram apple attached to a branch of a tree 2 meters above a spring on the ground below. The apple falls and hits the spring, compressing ito. I meter from its rest
position. If all of the gravitational potential energy of the apple on the tree is transferred to the spring
when it is compressed, what is the spring constant of this spring?
APPLE
2 m
A) 10 N/m
B) 40 N/m
C) 400 N/m
D) 100 N/m

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.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?