Physics B States of Matter

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Pressure

Force per square meter

Pressure

F/A unit: Pascals

Pascal

Unit for pressure

Pascals Principle

Any change in pressure applied at any point on a confined fluid is transmitted undiminished throughout the fluid

Hydraulics

A technology that uses Pascal's Principle to compress a fluid which amplifies a force

Buoyant

(Blank) Force is the upward force exerted on an object submerged in a fluid

Fb

(density of fluid)(volume of fluid)(9.8)

Fg

(density of object)(vol of object)(9.8)
or
(mass)(9.8)

Archimedes

this principle states that the buoyant force exerted on an object submerged in water is equal to the weight of the water displaced.

Bernoulli

This principle states, as the velocity of a fluid increases the pressure it exerts decreases

Flight

Bernoulli's Principle helps us explain how (blank) works.

Boats

Archimedes' Principle helps us explain how (blank) float.

Cohesive

these forces exist between like substances. "co-workers"

these forces exist between two unlike substances. "ADding two things together"

Surface Tension

the result of cohesive forces and make a fluid contract to its smallest possible area.

Capillary Action

occurs when a narrow glass tube is placed in a fluid and that fluid moves up the tube. Due to adhesion.

Expansion

Thermal (blank) occurs when a substance is exposed to various temperatures.

Fluid

a (blank) has no definite shape and can flow

unit for force.

low

(blank) pressure exists when air is moving from the ground up. This causes rainny weather.

high

(blank) pressure exists when air is moving from high altitudes down toward the ground. This results in fair weather.

pressure

winds are the result in differences between air (blank).

Meniscus

The concave bend when water is placed in a graduated cylindar. Due to adhesive forces between the cylidar and the water.

Linear

(blank) expansion occurs when an object changes its length due to a change in temperature

Volume

(blank) expansion occurs when a fluid changes due to change in temperature

Example: