Virtual Labs

A body radiates heat at the rate of 4 cal/m2/s, when its temperature is 227°C. what is the heat radiated by the same body when its temperature is 727°C

a: 8 cal/m^2/s Explanation

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b: 16 cal/m^2/s Explanation

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c: 64 cal/m^2/s Explanation

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d: None of the above Explanation

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The heat transfer equation Q = σAT4 is called

a: Newton’s law Explanation

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b: Stefan-Boltzmann law Explanation

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c: Poisson law Explanation

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d: Fourier law Explanation

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Calculate the radiant flux density from a black surface at 400 degree Celsius?

a: 1631.7 W/m^2 Explanation

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b: 31.7 W/m^2 Explanation

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c: 631.7 W/m^2 Explanation

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d: 11631.7 W/m^2 Explanation

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What is the wavelength band for solar radiation?

a: 1 * 10 ^-1 to ^3 micron meter Explanation

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b: 1 * 10 ^-1 to ^2 micron meter Explanation

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c: 1 * 10 ^-1 to ^1 micron meter Explanation

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d: 1 * 10 ^-1 to ^10 micron meter Explanation

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A furnace having inside temperature of 2250 has a glass circular viewing of 6 cm diameter. If the transmissivity of glass is 0.08, make calculations for the heat loss from the glass window due to radiation

a: 234.54 W Explanation

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b: 652.32 W Explanation

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c: 328.53 W Explanation

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d: 762.32 W Explanation

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