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प्रश्न
Define one calorie.
उत्तर
One calorie is the amount of heat energy required to raise the temperature of 1 gram of water through 1°C.
संबंधित प्रश्न
Fill in the blank
Heat is a form of _______.
Select the correct alternative
A thermometer uses
What is heat ? State its S.I. unit.
Define one kilo-calorie of heat.
What will absorb heat?
Wooden spoon
What will absorb heat?
Soil
Give scientific reason.
Dew drops form on the grass in winter.
Name the SI unit of heat.
1 calorie is 4.81 joules.
When an object is heated, the molecules that make up the object
If you apply some heat energy to a substance, which of the following can take place in it?
The process of converting a liquid into a solid is called ________.
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.
A marble tile would feel cold as compared to a wooden tile on a winter morning because the marble tile
To keep her soup warm Paheli wrapped the container in which it was kept with a woollen cloth. Can she apply the same method to keep a glass of cold drink cool? Give a reason for your answer.
A circular metal loop is heated at point O as shown in Figure 4.6.
(i) In which direction would heat flow in the loop?
(ii) In which order are the pins at points P, Q and R fixed with the help of wax fall if points O, P, Q and R are equidistant from each other?
In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.
You would have noticed some space being left on railway tracks. Why?
