ARIHANT-HEAT TRANSFER-Heat Transfer
- A block body at temperature T radiates same amount of energy in the wa...
03:12
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- Majority of radiation from the Sun is in visible and near infra-red (0...
01:48
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- A metal ball of mass 1.0 kg is kept in a room at 15^(@)C. It is heated...
03:10
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- A hot body is suspended inside a room that is maintained at a constant...
04:37
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- Newton’s law of cooling says that the rate of cooling of a body is pro...
04:12
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- “Blue hot is hotter than red hot”. Explain.
01:37
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- A planet of radius r(0) is at a distance r from the sun (r gtgt r(0))....
04:40
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- A star having radius R has a small planet revolving around it at a dis...
05:43
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- A 20 mm diameter copper pipe is used to carry heated water. The extern...
04:24
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- Solar constant, I(s) is defined as intensity of solar radiation incide...
04:45
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- A tapering rod of length L has cross sectional radii of a and b(lt a) ...
04:23
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- A thick cylindrical shell made of material of thermal conductivity k h...
06:53
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- A double pan window used for insulating a room thermally from outside ...
07:06
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- The container A contains ice at O^(@)C. A conducting uniform rod PQ of...
08:55
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- Two identical adiabatic containers of negligible heat capacity are con...
06:34
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- A copper slab is 2 mm thick. It is protected by a 2 mm layer of stainl...
06:50
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- A steel plate is 0.3 m long, 0.1m wide and 0.012 m thick. The plate is...
04:30
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- A straight cylindrical wire is connected to a battery. The wire is mai...
02:39
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- A spherical shell is kept in an atmosphere at temperature T(0). The wa...
03:57
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- A body at a temperature of 50^(@)C cools to 49^(@)C in time Deltat whe...
04:35
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