Why it becomes bitterly cold as soon as the snow starts melting?

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An ice-box is built of wood 1.75 cm thick, lined with cork 3 cm thick. If in the steady state the temperature of the inner surface of the cork is 0 ºC and that of the outer surface of wood is 12 ºC, what is the temperature of the wood-cork interface? The thermal conductivities of wood and cork are 0.2 W/m-K and 0.04 W/m-K respectively

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What do you mean by diffraction and what is/are the proper condition/conditions for it?

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Why is water in kept in ?gharas? in summer ?

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Tell me why is n-type conductor is neutral?

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Consider earth's equator is covered with a measuring tape touching the ground such both the ends touch each other. if the tape is lifted 1 meter from the ground, what would be the distance between two ends of tape?

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Explain the name for the physical constant with a value of 6.62 x 10-27 erg seconds?

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How we are getting light from electrical bulb?

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Why is lighting conductor used ?

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Define non-Luminous body ?

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If blue light is combined with green light, what color of light is produced?

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in one optical instrument, what is the effect of usingtwo converging lenses?

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