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On clear night there is radiation from earth’s surface to the space. On such a night, the water particles on the plant leaves radiate to the sky whose temperature may be taken as 200 K. The water particles receive heat by convection from the surrounding air, the convection heat transfer coefficient has a value of 30 W/m2 K. If the water should not freeze, make calculations for the air temperature
  • a)
    280.474 K
  • b)
    345.645 K
  • c)
    123.456 K
  • d)
    874.387 K
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
On clear night there is radiation from earth’s surface to the sp...
Heat radiated to sky = Heat received by convection. So, temperature of air = 224.22/30 + 273 = 280.474 K.
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On clear night there is radiation from earth’s surface to the sp...
Yes, on a clear night there is radiation from the Earth. The Earth emits radiation in the form of thermal infrared radiation. This radiation is a result of the Earth's surface and atmosphere absorbing solar radiation during the day and then re-emitting it as heat at night. This phenomenon is known as Earth's outgoing longwave radiation. It is a natural process and contributes to the overall energy balance of our planet.
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On clear night there is radiation from earth’s surface to the space. On such a night, the water particles on the plant leaves radiate to the sky whose temperature may be taken as 200 K. The water particles receive heat by convection from the surrounding air, the convection heat transfer coefficient has a value of 30 W/m2K. If the water should not freeze, make calculations for the air temperaturea)280.474 Kb)345.645 Kc)123.456 Kd)874.387 KCorrect answer is option 'A'. Can you explain this answer?
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