Steam is passed into $22\, g$ of water at $20\,^oC$ . The mass of water that will be present when the water acquires a temperature of $90\,^oC$ is ............ $\mathrm{gm}$ (Latent heat of steam is $540\, cal/gm$)
$24.8\, gm$
$24\, gm$
$36.6\, gm$
$30\, gm$
A sphere and cube made of same material and having same surface area are heated to the same temperature and kept in the same surrounding. The ratio of their initial rates of cooling will be
Gravitational force is required for
Liquid cools from $50^oC$ to $45^oC$ in $5$ minutes and from $5^oC$ to $41.5^oC$ in the next $5$ minutes. The temperature of the surrounding is......... $^oC$
Two rods are connected as shown. The rods are of same length and same cross sectional area. In steady state, the temperature $\left( \theta \right)$ of the interface will be........ $^oC$
Two circular discs $A$ and $B$ with equal radii are blackend. They are heated to same temperature and are cooled under identical conditions. What inference do you draw from their cooling curves ?