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Physics

Physics
Heat stored in water vapour is

Relative heat
Latent heat
Specific heat
Absolute heat

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Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

5 R
4 R/5
5 R/4
R/5

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Physics
Lightning heats the surrounding air to

3000 deg Cent
300 deg Cent
300000 deg Cent
30000 deg Cent

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Physics
The locomotion of insects to the source of light is called :

Phototropic
Hydrotropic
Thermotactic
Phototactic

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Physics
The commonly used coolant in refrigerators is

Freon
Nitrogen
Oxygen
Ammonia

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Physics
Echolocation is an adaptation bats use to

Hunt insects in flight
Locate flowering plants
Find warm places for hibernation
All of these

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