Why does a person sweat more at Mumbai as compared to one in Delhi even when the temperature of the two towns is the same?

Why does water boil at a lower temperature in Nainital than in Delhi.

Why does a diamond shine more than a glass piece cut to the same shape ?

Why does temperature in Mumbai and Chennai not fall as low as it does in Delhi?

Is the thermometer reading of the temperature of air (in shade) the same as the temperature of sand or water? What do you think is the reason for this? And why does the temperature have to be measured in the shade?

Two spheres of same metal have the same volume. But one is solid and the other is hollow, when the change in temperature of both of them is same, which of the following statements about the change in their diameters is true?

A body having a temperature of 27^@C is kept in a room having a temperature of 27^@C . Does the body emit any radiation in this case when the room temperature is the same as body temperature ?

The sun is less bright at morning and evening as compared to at noon although its distance from the observer is almost the same. Why ?

How does density of hydrogen chloride gas compare with the density of air at the same temperature?

When two waves interfere , does one alter the progress of the other ?

When droplets of mercury are brought in contact, they immediately combine to form a bigger drop. Why ? Is the temperature of the bigger drop the same, or more, or less than the temperature of the droplets?