If 10 gram ice at –10ºC is added to 40 g of water at 15ºC, the temperature of the mixture is

While measuring the thermal conductivity of a liquid, we keep the upper part hot and lower part cool, so that

In which of the following process, convection does not take place primarily

The temperature of sun is determined by

If the temperature of a hot body is increased by 50% then the increase in the quantity of emitted heat radiation will be

A liquid cools down from 70°C to 60°C in 5 minutes. The time taken to cool it from 60°C to 50°C will be

The latent heat of vaporisation of a substance is always:

If the temperature of an iron rod is doubled then the amount of radiation emitted by it, as compared to its initial value, becomes

If specific heat of a substance is infinite, it means

Two rods of the same material have diameter in the ratio of 1 : 2 and lengths in the ratio of 2 : 1. If the temperature difference between their ends is the same, the ratio of heats conduced by them in a given time will be

10 g of steam at 100°C passes over a large ice block. What approximate amount of ice will melt ?

At what temperature the centigrade (Celsius) and Fahrenheit, readings are the same

The thermal capacity of 40 gm of aluminium(specific heat = 0.2 cal/gm/°C) is

The rate of radiation of a black body at 0°C is EJ/sec. The rate of radiation of this black body at 273°C will be

A hot and a cold body are kept in vacuum separated from each other. Which of the following will cause decrease in temperature of the hot body?