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प्रश्न
When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?
उत्तर
- When a window is left open on a winter night I will feel uncomfortable because the heat is escaping from the room.
- Heat will transfer from high temperature to low temperature.
- During winter cold air enters into the room, so room temperature will decrease.
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संबंधित प्रश्न
Name the one common unit of temperature. Write their symbols also.
Define calorie. How many joules make one calorie?
Convert the following temperature into Celsius scale:
113oF
Draw a neat and labeled diagram of a Six's maximum and minimum thermometer. Explain briefly, the working of this thermometer. Give a use of this thermometer.
The following figure shows a copper washer. Explain, giving reasons, whether the following characteristics of the washer increase, decrease, or remain the same when it is heated.
(a) Internal diameter
(b) Volume
(c) Mass
(d) Density
(e) External diameter
Distinguish between heat and temperature.
Numerical Problems.
An iron ball requires 1000 J of heat to raise its temperature by 20°C. Calculate the heat capacity of the ball.
One calorie is the amount of heat energy required to raise the temperature of _______ of water through ______.
