Unit of surface tension in cgs system is?
Unit of surface tension in cgs system is?
A. Pascal
B. N/m
C. Dyn/cm
D. None of these
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Another name of vitamin C is__________?
Another name of vitamin C is__________?A. Ascorbic Acid
B. Acitic Acid
C. Citric Acid
D. LysozymeSound travels about ___________times faster in water than in air.
Sound travels about ___________times faster in water than in air.A. 2
B. 3
C. 4
D. 5Sound travels 4.3 times faster in water than air. In water, the particles are much closer together and they can quickly transmit vibration energy and the sound wave travels over four times faster than it would in air.
The yellow colour in photochemical smog is due to the presence of____________?
The yellow colour in photochemical smog is due to the presence of____________?A. Sulphur dioxide
B. Carbon dioxide
C. Nitrogen dioxide
D. CFC’sWhich animal has no vocal chords ?
Which animal has no vocal chords ?A. Lion
B. Zebra
C. Dolphin
D. GiraffesGiraffes do have a larynx (voice box), but perhaps they couldn’t produce sufficient airflow through their 13-foot long (4 meter) trachea to vibrate their vocal folds and make noises. The researchers suspected the reason no one heard giraffe communication was because the sound frequency was too low for humans to hear.
Which one of the following is the softest?
Which one of the following is the softest?A. sodium
B. iron
C. aluminium
D. lithiumThe main cause of air pollution is __________?
The main cause of air pollution is __________?A. Burning Of Fuels
B. Forests
C. Fertilizers
D. None of these