Questions

Atoms are composed of three main particles called electrons, protons and neutrons. We know that, the electrons are negatively charged particles whereas protons are positively charged and neutrons have no charge.

Hence, as the number of electrons and protons are equal and they are oppositely charged, the atom will have no charge as their charges cancel each other.

Radon gas is a source of natural groundwater pollution.

Collisions occur at curves because speed on the approach is too great.

The main causes for the boat accidents are ::

1. Excessive speed

2. Machinery failure

3. Operator inexperience

4. Alcohol use

5. Operator inattention

6. Lack of proper look-out

7. Careless/reckless behavior and hull failure

8. Hazardous waters

and some more...

Both when accelerated through a potential difference of 100KV, they will have the same energy. The mass of the electron is less than the mass of a proton, hence it will move faster(momentum).

Viswanathan Anand