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प्रश्न
Define one calorie.
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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 _______.
Define the term heat.
Define the term calorie. How is it related to joule (the S.I. unit of heat)?
While deciding the unit for heat, which temperature interval is chosen? Why?
What will absorb heat?
Water
What will absorb heat?
Wax
What will absorb heat?
Glass vessel
Find the odd one out and give its explanation.
Which temperature segment is chosen when determining the unit of heat? Why?
1 calorie is 4.81 joules.
Write scientific reason.
In the cold regions, snow falls in winter.
The process of converting a liquid into a solid is called ________.
______ energy can be generated by the burning of fuels like coal, wood, charcoal, gasoline, etc.
In the arrangements A and B shown in the following figure, pins P and Q are fixed to a metal loop and an iron rod with the help of wax. In which case are both the pins likely to fall at different times? Explain.
Observe the picture given in figure. Water is being boiled in a pan of wide base.
- Which position P or T will feel warmer?
- Fill up the boxes P and T to indicate the mode of flow of heat to the hand.
Match the following
| 1. | Heat | a. | Good absorber |
| 2. | Temperature | b. | Form of energy |
| 3. | Black surface | c. | Insulators |
| 4. | Rubber, cork | d. | The measure of hotness or coldness |
Assertion: Small gaps left between railway lines.
Reason: It allows for the contraction of rails during summer.
Arrange the following in order of decreasing the expansion of heating: Steel, milk, air.
