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Physics
The coefficient of viscosity for hot air is
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Q. The coefficient of viscosity for hot air is
AIIMS
AIIMS 2012
A
greater than the coefficient of viscosity for cold air
B
smaller than the coefficient of viscosity for cold air
C
same as the coefficient of viscosity for cold air
D
increase or decrease depending on the external pressure
Solution:
Cold air is significantly more viscous, but the viscosity of air is so low that you'd really never notice it anyway. Hot air feels more viscous, it's probably because hot air tends to have more water vapor in it, and humid air tends to feel thicker.