An object will sink in a fluid if

A man placed some durians in a plastic bag and carried the bag. After a while, the man noticed that the plastic bag is torn. Why?

What is the pressure on a boy’s feet if his mass is 40 kg and the total area of the soles of his shoes is 180 cm² ?

The pressure of sea water at the bottom of the sea is 1.2 × 108 N m–2.

Determine the depth of the sea.

[Density of sea water = 1020 kg m^–3]

A submarine has a surface area of 300 m².

The density of sea water is 1050 kg m^–3.

At what depth under the sea, will the additionalpressure on the submarine be 5 × 10⁵ Pa?

[Take g = 10 N kg^–1]

The figure shows a pond with two fish P and Q.

What is the correct relation of the water pressures on fish P and fish Q?