Define critical velocity of object.

Important Questions on Matter : Structure and Properties

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

What is role of viscosity in motion?

MEDIUM

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Two streamlines cannot cross each other. Why?

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Viscosity is the property exhibited by -

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Does a parachute descend slowly?

MEDIUM

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Explain how the shape of an aeroplane reduces friction.

MEDIUM

Physical Science>Physics>Matter : Structure and Properties>Viscosity

What do you mean by an ideal liquid? Prove that when an ideal liquid flows through a tube in streamlined motion, the product of the cross-sectional area of the tube and the velocity of flow is constant.

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

What is the terminal velocity of a falling object?

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Streamline flow is more likely for liquids with

MEDIUM

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Distinguish between streamlined flow and turbulent flow.

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Coefficient of discharge is the ________of actual discharge to the theoretical discharge.

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

In which liquid, water or honey, the terminal velocity attained by an object will be smaller?

MEDIUM

Physical Science>Physics>Matter : Structure and Properties>Viscosity

What is terminal velocity? Using its idea, explain the safe jumping from an aeroplane using parachute.

HARD

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Define viscous force.

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

What is terminal velocity of object?

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

In a turbulent flow, the velocity of the liquid molecules in contact with the walls of the tube___________.

MEDIUM

Physical Science>Physics>Matter : Structure and Properties>Viscosity

What is meant by streamline and turbulent flow of a liquid? What is the difference between them?

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Flow in which the speed of the fluid at a point continuously changes in both magnitude and direction is called _____.

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Which of the following liquids has more viscosity?

EASY

Physical Science>Physics>Matter : Structure and Properties>Viscosity

Which has greater viscosity, oil or honey? Why?

MEDIUM

Physical Science>Physics>Matter : Structure and Properties>Viscosity

How does viscous force act on the layers of a fluid.? Above which velocity, the fluid motion becomes turbulent?