How much does two pints of water weigh when frozen?
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Why do we lean forward while climbing up a hill ?
What is a Diamond ?
In any current connection there are two wires one is phase and another is neutral, what is the use of neutral wire?
When water is boiled in a tin and its mouth is closed by a rubber cork, then on pouring cold water over the tin it is crushed. Why ?
Why does a semicondctor act as an insulator at 0'k and why its conductivity increases with increasing temperature?
What is a Compound ?
Why ate the telegraph wires kept a little loose ?
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Describe the main process involved in the manufacture sugar. What is the main bi-product of sugar industry and to what use as put in Bihar ?
Does sunlight reflected off a mirror increase the temperature of the sun-rays?
Explain what is the shadows?
What is the pitch?