Question

There is a metal rod (XY),on which metal pins (P,Q and R) are attached with wax at regular distances.If X end of the rod is heated,then which pin will fall first? Which pin will fall next?

Answer 1

Explanation:

In the case 'A', the heat moves in both directions So, the pins, P and Q will stop working simultaneously. In the case 'B', the pin P will not succeed before the pin Q. The reason behind is that the heat will reach at pin P first.

Solved

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