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प्रश्न
If a substance is heated or cooled, the change in mass of that substance is
विकल्प
positive
negative
zero
none of the above
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उत्तर
Zero
Hint: Mass is always conserved during any change as the transmission of heat either cooling or heating.
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संबंधित प्रश्न
Name the S.I. unit of heat and how is it related to the unit calorie?
A given mass of water is cooled from 10°C to 0°C. State the volume changes you will observe. Represent these changes on a temperature-volume graph.
1 joule = 4.2 calorie
Is this relation correct?
State the advantages and disadvantages of mercury and alcohol as thermometric liquids.
Define the process of conduction.
Match the following
| 1. | Heat | 0o C |
| 2. | Temperature | 100o C |
| 3. | Thermal Equilibrium | kelvin |
| 4. | Ice cube | No heat flow |
| 5. | Boiling water | joule |
For setting curd, a small amount of curd is added to warm milk. The microbes present in the curd help in setting if the temperature of the mixture remains approximately between 35°C to 40°C. At places, where room temperature remains much below the range, setting of curd becomes difficult. Suggest a way to set curd in such a situation.
Assertion: Temperature is the measure of heat energy.
Reason: Energy is the capacity to do work.
