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प्रश्न
Fill in the blank
Heat is a form of _______.
पर्याय
electrical energy
gravitational energy
thermal energy
None of these
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उत्तर १
Heat is a form of energy.
उत्तर २
Heat is a form of thermal energy.
संबंधित प्रश्न
Match the following
| Column A | Column B |
| 1. mercury | 1. insulator |
| 2. wood | 2. water from 0°C to 4°C |
| 3. Aluminum | 3.absorbs |
| 4. contracts | 4.conductor |
| 5.black surface | 5. Thermometer |
Select the correct alternative
A thermometer uses
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?
Give scientific reason.
Dew drops form on the grass in winter.
Write scientific reason.
In the cold regions, snow falls in winter.
When an object is heated, the molecules that make up the object
The unit of heat is
The unit of heat and temperature are the same.
Why does the bottom of a lake not freeze in severe winter though the surface is all frozen?
We reduce the heat by adding ______ while preparing fruit juice.
______ energy can be generated by the burning of fuels like coal, wood, charcoal, gasoline, etc.
The sun gives us light and heat.
A circular metal loop is heated at point O as shown in the following figure.
- In which direction would heat flow in the loop?
- 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?
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.
In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.
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 |
The sum of the kinetic and potential energy is called the ______ of the molecules.
