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प्रश्न
Find the odd one out and give its explanation.
पर्याय
Joule
erg
Calorie
Newton
उत्तर
Newton
Explanation-
Newton is a unit of force while others are units of heat energy.
APPEARS IN
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
Name the mode of transfer of heat in the following :
(a) solid,
(b) liquid,
(c) gas
(d) vacuum
What will absorb heat?
Iron griddle (tava)
What will absorb heat?
Wax
What will absorb heat?
Wooden board
Give a scientific reason.
In winter, why does an iron pillar feel colder than a wooden pole?
Which temperature segment is chosen when determining the unit of heat? Why?
Write scientific reason.
In the cold regions, snow falls in winter.
When an object is heated, the molecules that make up the object
The sun gives us light and heat.
Analogy:
Movement of molecules:: Heat.
Heat energy:: ______.
How can heat energy be generated?
Observe the picture given in Figure 4.8. 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.
The water in the black can becomes ______ than that in a white can after exposure to the sun.
Black color is a ______ absorber of heat.
Assertion: Small gaps left between railway lines.
Reason: It allows for the contraction of rails during summer.
Match the following:
| Column A | Column B | ||
| 1. | Heat | a. | Heat gained or lost in the change of state without any change in temperature |
| 2. | m × L. | b. | Heat gained or lost when there is no change of state |
| 3. | Temperature | c. | Form of energy |
| 4. | m × s × t | d. | SI unit of specific latent heat |
| 5. | J/Kg | e. | degree of hotness or coldness |
