Thermal Propert...

A liquid is kept in a cylindrical vessel which is rotated along its axis. The liquid rises at the sides (Fig). If the radius of the vessel is 0.05 m and the speed of rotation is 2 red/s, find the difference in the height of the liquid at the centre of the vessel and its sides.

A fire hydrant delivers water of density ρ at a volume rate L. The water travels vertically upwards through the hydrant and then does 90^o turn to emerge horizontally at speed υ. The pipe and nozzle have uniform cross section throughout. The force exerted by water on the corner of the hydrant is

A block is submerged in vessel filled with water by a spring attached to the bottom of the vessel. In equilibrium, the spring is compressed. The vessel now moves downwards with an acceleration a (< g). The spring length

An ice block having two similar metallic pieces is floating in water in a vessel, as shown in Fig. After sometime the ice melts completely, then

recently, the phenomenon of superconductivity has been observed at 95 K. This temperature is nearly equal to

The temperature of a substance increases by 27^oC. On the Kelvin scale the increase is equal to

The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at 10^oC and 100^oC. The temperature at which the resistance is 3.26 ohm is

No other thermometer is as suitable as a platinum resistance thermometer to measure temperature in the entire range of

Two rectangular blocks, having identical dimensions, can be arranged either in configuration II as shown in the figure. One of the blocks has thermal conductivity k and the other 2k. The temperature difference between the ends along the x-axis is the same in both the configurations. It takes 9 s to transport a certain amount of heat from the hot end to the cold end in the configuration I. The time to transport the same amount of heat in the configuration II is

The absolute zero is the temperature at which