A block of mass 'm' is suspended by different springs of spring constants shown in the figure.
Let time period of oscillation in these four positions be T1, T2, T3 and T4. Then
A bucket full of hot water cools from 75∘C to 70∘C in time T1 , from 70∘C to 65∘C in time T2 and from 65∘C to 60∘C in time T3, then