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प्रश्न
Give a scientific reason for the following:
Old quits are less warm than the new ones.
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उत्तर
Old quilts are less warmer than new ones because the cotton in the old quilt gets compressed and very little air will remain trapped in it, hence heat insulation is quite poor
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संबंधित प्रश्न
What is the Kelvin scale of temperature?
Explain the following
In winter, water tanks (or ocean) start freezing from the surface and not from the bottom.
At 0°C and 760 mm Hg pressure, a gas occupies a volume of 10Q cm3. The Kelvin temperature (Absolute temperature) of the gas is increased by one-fifth while the pressure is increased one and a half times. Calculate the final volume of the gas. [80 cc.]
Name the scientist who designed the first thermometer.
The hot metal ball is suspended from a string in a metal box as shown in the following figure
(i) What are the ways in which the ball loses heat
(ii) Which side of the box will be the hottest and which the least hot after some time? Explain.
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 |
Temperature is related to how fast the atoms within a substance are moving.
What do you mean by thermal equilibrium?
