When a body has the same temperature as that of its surroundings

A body cols at the rate of 0.5^@C/s when it is at a temperature of 50^@C above the surroundings. What would be the rate of cooling when the body is at a temperature of 30^@C above the surroundings.

The rate of fall of temperature of a body is difrectly proportional to the excess temperature of the body over the surroundings, (for small temperature difference). This is ________

A body cools at the rate of 1.5 °C/min when its temperature is 30 °C above that of the surrounding. At what temperature above the surrounding will it cool at the rate of 1 °C/min?

In ___________ (warm-blooded/cold-blooded) animals, the body temperature changes with the surrounding temperature.