1.Why does clock becomes slow in summers?? 2.When we take a wounded clock on the moon what will happen to clock?and Why (a)Becomes slow (b)Becomes fast (c)No Effect at all (d)none of these

Pls post one query at a time.

 

In summer, due to increase in atmospheric temperature, the length of pendulum of the clock increases due to expansion and therefore the time taken for each oscillation increases and the clocks goes slow.