Question

A boy swims a lake and initially dives $0.5m$ beneath the surface. When he dives $1m$ beneath the surface, how does the absolute pressure change?

• A. It doubles
• B. It quadruples
• C. It slightly increases
• D. It cut to a half

Answer 1

The correct option is C It slightly increases

When he goes from $0.5$ m to $1$ m , the pressure will slightly increases

Pressure at depth $0.5m$ is $P_0+0.5dg$ , where $P_0$ is atmospheric pressure , $d$ is density

The pressure change when he divies to $1m$ is $P_0+dg$

So the pressure change slightly increases

Therefore option $C$ is correct