In an expansion work is done by the system . TRUE or FALSE

When a ceiling fan is switched on, it makes 10 rotations in the first 4 s. How many rotations will it make in the next 4 s? (Assuming uniform angular acceleration)

"When a large bubble rises from the bottom of a lake to the surface. Its radius doubles. If atmospheric pressure is equal to that of column of water height H, then the depth of lake is

The mass of a box measured by a grocer's balance is 3.3 kg. Two gold pieces of masses 15.20 g and 20. 20 g are added to the box. The total mass of the box is

Dimensions of stress are (2020)

The formula for exponential population growth is [2014]

The electrons excited by light absorption are picked up by

The ratio of work and time is known as the?

An automobile engine develops 100kW when rotating at a speed of 1800 rev/min. What torque does it deliver ?

The torque transmitted by an engine to the rotor is 180 Nm. What will be angular speed of the rotor if the power of the engine is 18kW?