Devni and James are discussing water pressure. Devni thinks that the pressure exerted by a liquid depends on the density of the liquid. James thinks that density is not as important, as the pressure is the same in all liquids. Who is correct, Devni or James?

Devni is correct

Explanation:

The relationship between pressure and density of a liquid is directly proportional i.e. the amount of pressure exerted on a liquid is directly proportional to its density and this is because when pressure is exerted the volume is compressed hence there will be a proportional increase in density as well.

hence pressure is as important as density in liquids

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.