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A body radiates out 300 calories of heat energy. How much heat energy is radiated out by the body in joules?
What causes a change in the temperature of a body?
A copper wire 10 cm long is heated from 200C to 300C. Find the increase in length of the wire, if coefficient of linear expansion of copper is 1.7 X 10-5oC-1
Explain the following:
In a solid, heat is not transferred by the process of convection.
Suppose your normal body temperature were lower than what it is. How would the sensation of hot and cold change?
A thermostat is a device which maintains _____.
Numerical Problems.
An iron ball requires 1000 J of heat to raise its temperature by 20°C. Calculate the heat capacity of the ball.
Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.
Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.
Temperature is the average ______ of the molecules of a substance.
