Explain the use of galvanometer?
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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
Why is diamond so bright ?
x- rays travel with the velocity of
Explain diffraction?
Why does a heavy stone nor break a glass place when place slowly on it, while a small stone falling from a great height easily breaks it ?
What is balanced field takeoff?
Why does sun appear flat during sunrise and sunset?
What is radium used for?
What is the proper definition of light?
Which friction is grater, statical or dynamical ?
Define Self-Luminous body ?
Explain the Dew Point ?