Work and Energy — Science STD 9 — Question

State the relation between the momentum of a body and the force acting on it.

With which physical quantity should the speed of a running bull be multiplied so as to obtain its momentum?

Define atomic mass of an element.

What is a proton? How does it differ from a neutron?

Which of the following terms apply to sound waves in air and which to water waves?
Transverse, Rarefaction, Trough, Crest, Compression, Longitudinal.

What is the other name of a loud-hailer?

If the fish is being fried in a neighbouring home, we can smell it sitting in our own home. Name the process which brings this smell to us.

A mug full of water appears light as long as it is under water in the bucket than when it is outside water. Why?

The total number of electrons in a nitrogen atom is 7. Find the number of valence electrons in it.

What do we call those particles which are formed:
By the gain of electrons by atoms?