Thermodynamics — Physics STD 11 Science — Question

Relative to which axis the moment of inertia of the body is minimum?

For finite change in linear momentum in short interval of time force acting on a body is inversely proportional to ________.

What is the formula for the velocity of efflux in a pore h metres below the water surface in a tank?

Give the magnitude and direction of the net force acting on. A cork of mass 10g floating on water.

The gravitational force between a hollow spherical shell (of radius R and uniform density) and a point mass is F. Show the nature of F vs r graph where r is the distance of the point from the centre of the hollow spherical shell of uniform density.

A piece of lead is hammered. Does its internal energy increase? Does the heat enter the lead from outside?

Explain why the speed of a whirl wind in a tornado is alarmingly high.

When we step barefoot into an office with a marble floor, we feel cold. Why?

Water is slowly coming out from a vertical pipe. As the water descends after coming out, its area of cross-section reduces. Explain this on the basis of the equation of continuity.