49. 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) Increases or decreases depending on the external pressure
Answer-a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a