In case of liquid, if Reynold's number '$R_n$' is $1450$, then the flow of liquid will

A sphere is at temperature $600$ K. In an external environment of $200$ K, its cooling rate is R. When the temperature of the sphere falls to $400$ K then cooling rate R' will become

Two rods of same length, radius and material transfer a given amount of heat in 't' second when they are joined as shown in fig (1). But when they are joined as shown in fig (2) then they will transfer same heat in same condition in time

A rigid diatomic gas $\left(\gamma = \dfrac{7}{5}\right)$ is compressed adiabatically to volume $\left(\dfrac{V_i}{32}\right)$, where $V_i$ is the initial volume. The initial temperature of the gas is '$T_i$' K and the final temperature is '$x\,T_i$' K. The value of $x$ is