PART - 1 CH - 7 Gravitation — Physics STD 11 Science — Question

Water is flowing in a horizontal pipe of un equal area of cross-section. At a narrow place in the pipe the velocity will be higher and the pressure will he lower.

The heat engine with maximum efficiency is steam engine.

According to impulse-momentum theorem, if the change in momentum is constant then its impulse will also be constant.

A periodic oscillator is one performs simple periodic.

Read each statement below carefully and state, with reasons, if it is true or false:
The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre.

The motion of an arrow released from a bow is on a parabolic path.

In Bernoulli's principle, the sum of pressure energy, kinetic energy and potential energy is not a constant.

The square root of the ratio of the moment of inertia (I) of an object relative to a rotation axis and the total mass (M) of the object is called the radius of rotation relative to that rotation axis.

All reversible heat engines working at the same temperatures have the same efficiency.

Center of mass of the cone from the top 1/4 h distance situated at is.