Motion in a Plane — Physics STD 11 Science — Question

Time-displacement graph is a straight line parallel to the time axis. The values of velocity and acceleration will be ................ .

Viscosity of gases __________  with temperature, whereas viscosity of liquids __________ with temperature. (increases/decreases)

Spherical balls of radius R are falling in a viscous fluid of viscosity n with a velocity v. The retarding viscous force acting on the spherical ball is:

1. Directly proportional to radius R but inversely proportional to velocity.
2. Directly proportional to both radius R and velocity v.
3. Inversely proportional to both radius R and velocity v.
4. Inversely proportional to R but directly proportional to v.

The time-velocity graph of a car is a straight line parallel to the time axis. Then accelerate will be ................ .

What are the four steps in a Carnot's engine?

Elastic behaviour of a body is due to 9. Materials which do not obey Hook's law but can be stretched elastically to large values of strain are called ________.

In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from ____________________.

The slope of tangent at any point on position-time graph is the measure of _______.

The impulse of a force is equal to change in....................and this is called as.................... .

Fill in the blanks by suitable conversions:
1m = ______ light year