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Qns36. reduce exposed surface area: smaller exposed surface area allows a slower rate of heat gain leading to a slower rate of evaporation decreases.
Qns36(b). open the cloths to thave a larger exposed surface are.Thus allowing more water in the cloth to gain heat leading to a higher rate of evaporation.
Qns37.
B to X ~ KE converted to GPE
E: some of the KE was converted to heat and sound energy as the toy car moves from B to C.
R: with less KE converted to less GPE, the toy car only moved into the mid-air at position X.
(c) between position A and C.
(as some KE will be converted to HE and SE. Hence releasing the toy car between position A and C will allow sufficient KE converted to move along the track)
39(b). energy: E:As the toy car knocked onto the cardboard, KE from the toy car is transferred tot he cardboard causing it to move a distance.
R: The cardboard stop when all of the KE has been coverted to HE and SE.
E: the moving toy car pushed th ecardboard causing it to move R:Frictional force between the cardboard box and floor overcame the pushing force, causing it to stop.
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