Chapter 3: Fluid Mechanics

**Fluid**

refers to both liquids and gases

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**density formula**

**Pressure**

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

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**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**

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**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.

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(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