Answer the following questions: 1. Write the names of two materials, matter and substances each.
2. Give two examples of homopolymers.
3. What is the full form of PVC? Give one property of it.
4. What is nylon? Give one example.
5. Give the names of blended fibre of terylene with cotton and wool.
6 What is orlon? Name the compound from which it is produced
7. Give one example each of low density polythene and high density polythene.
8. From which synthetic polymer thermocol is obtained? Name it
9. Name the synthetic polymer from which handles of pressure cooker and unbreakable crockery is made
10. What is araldite?

In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. thus, the charge can be considered to be distributed uniformly throughout the cloud. for the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. the point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. this breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another nearby cloud. the ionized air will then emit light due to the recombination of the electrons and atoms to form excited molecules that radiate light. in addition, the large current will heat up the air, resulting in its rapid expansion. these two phenomena account for the appearance of lightning and the sound of thunder. take the breakdown electric field of air to be eb=3.00ă—106n/c. part a estimate the total charge q on the cloud when the breakdown of the surrounding air is reached. express your answer numerically, to three significant figures, using ďµ0=8.85ă—10â’12c2/(nâ‹…m2) .

Using gravity, an elephant can pull a mouse towards it from the ground. true or false explain why. will give brainliest if answered fast and the best explanation

What describes the particles in a liquid