PART - 2 CH - 14 Waves — Physics STD 11 Science — Question

Is a vector necessarily changed if it is rotated through an angle?

Does the centre of mass of a solid necessarily lie within the body? If not, give an example.

Read each statement below carefully and state, with reasons and examples, if it is true or false:A scalar quantity is one that
Does not vary from one point to another in space.

Give the formula to find the no. of moles of gas.

At which place on earth, is the centripetal force maximum?

What is the amount of work done in bringing a mass from the surface of the earth on one side to a point diametrically opposite on the other side?

Which is a bigger unit-light year or parsec?

What is the relation between pressure and kinetic energy of a gas molecule?

A satellite is orbiting around the Earth with a speed v. To make the satellite escape, what is the minimum percentage increase in its speed?

Why should a thermometer bulb have a small heat capacity?