What are the essential characteristics of a wave?
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What is Alloy ?
Explain what is the rectilinear propagation of light?
How much does two pints of water weigh when frozen?
is it possible that the clock works differently in winter and in summer ?
Why is mercury used in thermometers rather than water?
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What is frequency of sound in air?
Can a solid and liquid together be possible?
What is reflection of light?
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-100 mmWC means how much kg/cm2