K.C.S.E Physics Q & A - MODEL 2011PP1QN07

19/7/2020

K.C.S.E Physics Q & A - MODEL 2011PP1QN07

Figure 6 shows a small toy boat floating on water in a basin. X and Y are two points near the toy.

When a hot metal rod is dipped into the water at point X, the toy is observed to move towards Y. Explain this observation.

ANSWER

Surface tension at X is reduced;
Higher surface tension at Y pulls the boat:

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K.C.S.E Physics Q & A - MODEL 2011PP1QN07

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