You might have observed on a dry day that whwn you touvh the screen of a television you get a slight shock. why does it happen?

Place an iron piece in amosit atomsphere and observe it after two days. Is there and deposition of new substance ? Why does it happen ? What is this phenomenon called ?

You might have observed that sometimes your pet dog starts barking though no one is seen near in its surroundings or no disturbance heard nearby. Does this observation raise any doubts in your mind about the peculiar behavior of dog after your understanding about ‘range of hearing the sound’. If yes, write them. (AS_2)

Have you ever observed carefully the syrup that you take for cough? Why do you shake it before consuming?

Why does a leech die, if you put some salt on it?

You can not enjoy watching a movie or television from a very short distance from the screen.

a. A comb run through one's dry hair attracts small bits of paper. Why? What happens if the hair is wet or if it is a rainy day? (A paper does not conduct electricity.) b. Ordinary rubber is an insulator. But special rubber tyres of aircraft are made slightly conducting. Why is necessary? c. Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motion. Why? d. A bird perches on a bare high power line, and nothing happens to the bird. A man standing on the ground touches the same line and gets a fatal shock. Why?

You are waiting for a train on a railway platform. Your three year old niece is standin on your iron trunk containing the luggage. Why does the trunk not recoil as she jumps off on the platform?

You must have seen the doctor checking the sounds produced in the chest or heartbeat of a patient using a medical instrument called Stethoscope. On what principle does this Stethoscope work?