Physics Why do birds not have respiratory trouble at the time of flying at high altitude ? They have extra air sacs They use less oxygen They fly inactively Their lungs are very large They have extra air sacs They use less oxygen They fly inactively Their lungs are very large ANSWER DOWNLOAD EXAMIANS APP
Physics A piece of wood is held under water. The upthrust on it will be: Equal to the weight of the wood Less than weight of the wood Zero More than weight of the wood Equal to the weight of the wood Less than weight of the wood Zero More than weight of the wood ANSWER DOWNLOAD EXAMIANS APP
Physics Radio telescopes are better than optical telescopes because they can work during the day and night they can work even in cloudy conditions they can detect faint galaxies which no optical telescope can All of these they can work during the day and night they can work even in cloudy conditions they can detect faint galaxies which no optical telescope can All of these ANSWER DOWNLOAD EXAMIANS APP
Physics Stars in the sky appear to twinkle due to A surface tension phenomenon A series of refractions A series of reflections Multiple diminishing brightness A surface tension phenomenon A series of refractions A series of reflections Multiple diminishing brightness ANSWER DOWNLOAD EXAMIANS APP
Physics A bullet of mass 10gm is fired with a velocity of 40 m/s from a gun of mass 8 kg. Find the recoil velocity (in m/s) of the gun. 0.1 0.05 4 2 0.1 0.05 4 2 ANSWER DOWNLOAD EXAMIANS APP
Physics Which, of the following radiations has the least wavelength ? G-rays A-rays B-rays X-rays G-rays A-rays B-rays X-rays ANSWER DOWNLOAD EXAMIANS APP
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