Explain why
A spinning cricket ball in air does not follow a parabolic trajectory.

Explain why a cricketer moves his hands backwards while holding a catch .

Exhaled air does not contain the following gas.

Explain why an air bubble in water rises from bottom to top and grows in size?

Explain why the following systems are not aromatic?

Explain why H_(2)O has dipolemoment while CO_(2) does not have.

In which of the following examples of motion, can the body be considered approximately a point object: (a) a railway carriage moving without jerks between two stations. (b) a monkey sitting on top of a man cycling smoothly on a circular track. (c) a spinning cricket ball that turns sharply on hitting the ground. (d) a tumbling beaker that has slipped off the edge of a table.