Chapter 3: Fluid Mechanics

Fluid

refers to both liquids and gases

density formula

Pressure

force that is distributed over any small area of the object’s surface

1 Pa (pascal) is equal to

Hydrostatic Pressure

liquid is at rest

Buoyant Force

net upward force

Volume Flow Rate

is the volume of fluid that passes a particular point per unit time

Continuity Equation

Bernoulli’s Equation

The Bernoulli Effect

At comparable heights, the pressure is lower where the flow speed is greater.

of oil has a mass of 0.8 kg, then the density of this oil is

At sea level, atmospheric pressure, P atm, is about ___; this is 1 atmosphere.

101,300 Pa

Archimedes’ principle

The strength of the buoyant force on the object is equal to the weight of the fluid displaced by the object.

Viscosity

is the force of cohesion between molecules in a fluid

A circular pipe of non-uniform diameter carries water. At one point in the pipe, the radius is 2 cm and the flow speed is 6 m/s.

(a)What is the volume flow rate?

Density is denoted by the letter?

p (the Greek letter rho)

subscript ⊥

means perpendicular

pressure is a scalar

 when pressure is the magnitude of the force per area

SI units, flow rate is expressed