The coefficient of viscosity for hot air is

Question

The coefficient of viscosity for hot air is (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

Tardigrade Admin · Accepted Answer

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.

Q. The coefficient of viscosity for hot air is

greater than the coefficient of viscosity for cold air

smaller than the coefficient of viscosity for cold air

same as the coefficient of viscosity for cold air

increase or decrease depending on the external pressure

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.