What will be the terminal velocity of a rain drop of radius (r) 1mm a – McqOptions

MCQOPTIONS

1.	What will be the terminal velocity of a rain drop of radius (r) 1mm and mass (M) 0.001g falling through air. The coefficient of viscosity of air (η) is 1.8 X 10-5Ns/m2? Neglect buoyant force.
A.	20 m/s
B.	29.47 m/s
C.	35.8 m/s
D.	40 m/s
Answer» C. 35.8 m/s

Discussion

No Comment Found

Related MCQs

What will be the terminal velocity of a rain drop of radius (r) 1mm and mass (M) 0.001g falling through air. The coefficient of viscosity of air (η) is 1.8 X 10-5Ns/m2? Neglect buoyant force.
On which these factors does air/fluid resistance force, acting on a spherical body, not depend?
In a closed pipe of radius R, fluid (having some viscosity) is flowing laminarly. Which point along a cross section will have maximum speed?
A block of mass 2kg is going down an incline over a fluid having some viscosity. The block moves with a constant speed of 5m/s. Assuming that the temperature of fluid remains constant, find the coefficient of viscosity of the fluid. Angle of incline is 30° & block is a cube of side 1m. Also given that the thickness of fluid is 1cm.
What is the effect of temperature increase on viscosity of liquids and gases?
The coefficient of viscosity is equal to the ratio of shear stress to shear strain. True or False?
Coefficient of viscosity doesn’t depend on temperature because it is a property of the fluid. True or False?
1 poise = _________ Ns/m2. Fill in the blanks.
Viscosity is said to be internal friction between fluid layers. What type of force is it?