One quality of a thermometer is that its heat capacity should be small. If P is a mercury thermometer, Q is a resistance thermometer and R thermocouple type then

Before a clinical thermometer is used, it should be ensured that the mercury level is

For a constant volume gas thermometer, one should fill the gas at

A plarinum resistance thermometer is condtructed which resds ,0^0 at ice point and 100^0 at steam point. Let t p denote temoerature on this scale and let t denote the temperature on a metcury on a mercury themomenter scale. The resistance of the platinum coil vares with t as R_1 = R_0 (1+alphat + betat^2) . Derive an expression for the resistance as a function of T_p .

(1) Take a few pieces of ice in a glass beaker as shown in figure. (2) Insert the bulb of a thermometer in ice and measure its temperature. (3) Put the beaker on a stand and heat the ice usinga burner. (4) Record the temperature using the thermometer after every minute. (5) As the ice is heated,it starts melting. Stir the mixture of ice and water. (6) Continue the heating even after ice starts melting. (7) Draw a graph of temperature versus time. Explain the following temperature vs time graph.

Why does the mercury level not fall on its own when the bulb of a clinical thermometer is removed from the mouth ?