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Physics

Physics
One watt-hour is equivalent to

3.6 x 103 J
6.3 x 10-7 J
6.3 x 103 J
3.6 x 10-3 J

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Physics
Which liquid is the most viscous?

Milk
Water
Diesel
Oil

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Physics
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because

The ringing is not loud enough
The bell jar is too small
The glass of the bell jar absorbs the sound waves
There is no air or any other gas in the bell jar

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Physics
In AC circuits, AC meters measure

Mean square values
Mean values
Peak values
Rms values

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Physics
Sound cannot pass through

Water
Air
Vacuum
Steel

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Physics
Burns caused by steam are much severe than those caused by boiling water because

Steam is gas and engulfs the body quickly
Temperature of steam is higher
Steam pierces through the pores of body quickly
Steam has latent heat

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