Oscillations — Physics STD 11 Science — Question

Write the formula for the terminal velocity of a small bullet freely falling in a viscous fluid.

Should the internal energy of a system necessarily increase if its temperature is increased?

Can we boil water inside in the earth satellite?

What is the nature of ultrasonic waves and what is their frequency?

Find the area of the circle of radius 3.458cm upto correct significant figures.

Answer the following: An artificial satellite orbiting the earth in very thin atmosphere loses its energy gradually due to dissipation against atmospheric resistance, however small. Why then does its speed increase progressively as it comes closer and closer to the earth?

Read statement below carefully, and state, with reasons, if it is true or false: During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body.

An NCC parade is going at a uniform speed of 6km/h through a place under a berry tree on which a bird is sitting at a height of 12.1m. At a particular instant the bird drops a berry. Which cadet (give the distance from the tree at the instant) will receive the berry on his uniform?

Two circular loops are placed with their centres separated by a fixed distance. How would you orient the loops to have:

1. The largest mutual inductance.
2. The smallest mutual inductance?

Torque acting on a body is equal to rate of change of _______.