Define pressure and state its SI unit.

A 500 N box rests on a floor with an area of 2 m². Calculate the pressure it exerts.

State the formula for calculating pressure in a liquid.

Why is the wall of a large dam built much thicker at the bottom than at the top?

State Archimedes' Principle.

An object weighing 20 N is fully submerged in water. It displaces a volume of water that weighs 15 N. Will the object sink or float?

What is the name of the upward force a fluid exerts on a submerged object?

State Pascal's Principle regarding pressure in an enclosed liquid.

Briefly explain how a hydraulic lift uses Pascal's Principle to multiply force.

Does the pressure at the bottom of a narrow tube of water differ from the pressure at the same depth in a wide lake? Explain.

What instrument is used to measure atmospheric pressure?

Why is it easier to float in saltwater than in freshwater?

What happens to atmospheric pressure as you climb a high mountain?

An object floats when the upthrust is equal to what other force?

What is the value of the pressure at a depth of 10 m in pure water? (Use ρ = 1000 kg/m³, g = 10 m/s²).