Pendulum clocks generally go fast in winter and slow in summer.Why ?

Explain why a wall clock goes fast in winter and slow in summer ?

Pendulum clocks may run slow in summer and fast in winter .Why?

Why do pendulum clocks made of ordinary metal go slow in summer ?

Woolen cloths are worn in winter but not in summer. Why?

Statement-1 : Pendulum clocks go slow in summer and fast in winter. Statement-2 : The length of the pendulum used in clock increases in summer.

Statement-1 : Pendulum clocks go slow in summer and fast in winter. Statement-2 : The length of the pendulum used in clock increases in summer.