Fluid Pressures

What is the pressure of a fluid?

The force exerted at normal to any surfaces it makes contact with

What is the equation for pressure?

p = F/A

What happens as the depth of a liquid increases?

The pressure increases

What does pressure increase as depth of a liquid increases?

There are more particles above that point

What is the equation for pressure at a depth in a liquid?

p = hρg

What is atmospheric pressure?

Pressure created by air molecules colliding with the earths surface

What happens as the altitude rises and why?

Atmospheric pressure decreases as there are fewer molecules above that point and the atmosphere is less dense

What is upthrust?

The force a fluid exerts on an object upwards

When wil an object float?

When it’s less dense than the fluid so the upthrust is equal to the weight

Wen will an object sink?

When its more dense as the weight is more than the equivalent volume of fluid displaced so upthrust is less