Physics
Of the following properties of a wave, the one that is independent of the other is its

frequency
wavelength
velocity
amplitude

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Physics
The law of conservation of energy states that

Energy can neither be created nor destroyed
Energy can neither be created or destroyed
Energy can either be created nor destroyed
Energy can either be created or destroyed

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Physics
Plants are dried up in winter due to frost because

There is mechanical loss of tissues and drought condition prevails
Evaporation does not take place
Photosynthesis does not take place at such low temperature
Respiration does not take place at low temperature

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