# Shared Flashcard Set

## Details

Test 6
Chapter 13 notes
34
Physics
10/26/2015

Term
 What are fluids?
Definition
 liquids and gases
Term
 What are materials that flow and have no definite shape of their own?
Definition
 liquids
Term
 force on a surface divided by the area of that surface
Definition
 pressure
Term
 Anything that exerts pressure is capable of producing _______ and doing ________.
Definition
 change, work
Term
 What is the formula for pressure?
Definition
 P=F/A
Term
 What kind of quantity is pressure?
Definition
 scalar
Term
 What is the unit for pressure?
Definition
 Pascal
Term
 What is a Pascal equal to?
Definition
 1 N/m^2
Term
 What is the standard atmospheric pressure?
Definition
 1.01325 x 10^5 Pa
Term
 What pressure does the best vacuum have?
Definition
 1 x 10^-13 Pa
Term
 Boyle's Law
Definition
 P1V1=P2V2
Term
 Charles's Law
Definition
 V1/T1=V2/T2
Term
 What is the Ideal Gas Law formula?
Definition
 PV=nRT
Term
 What does one mole represent?
Definition
Term
Definition
 1.6022 x 10^23
Term
 When heated, all forms of matter, generally become less dense and expand to fill more space.
Definition
 Thermal expansion
Term
 When air near the floor is warmed, gravity pulls the denser, colder air near the ceiling down and pushes the warmer air upward.
Definition
 convection current
Term
 What happens when water is rated from 0 to 4 degrees Celcius?
Definition
 instead of expanding, it contracts as the forces between particles increase and the ice crystals collapse
Term
 Why does ice float on water?
Definition
 the forces between water molecules are very strong, and the crystals that make up ice have a very open structure
Term
 What is the fourth state of matter?
Definition
 plasma
Term
 How is plasma formed?
Definition
 collisions between particles become violent enough to tear electrons off atoms, producing positively charged ions
Term
 What does plasma make up?
Definition
 most of the matter in the universe- all stars, lightening, and all hydrogen in outer space because its electrons have been stripped away
Term
 What is the difference between gas and plasma?
Definition
 plasma can conduct electricity
Term
 like particles stick together, and this causes service tension which is the tendency of the surface of a liquid to contract to the smallest possible area
Definition
 cohesion
Term
 resistance to flow
Definition
 viscosity
Term
 electromagnetic attractive forces that act between particles of different substances
Definition
Term
 any change in pressure applied at any point on a confined fluid is transmitted undiminished throughout the fluid
Definition
 Pascal's principle
Term
 an object immersed in a fluid has an upward force on it that is equal to the weight of the fluid displaced by the object. The force doesn't depend on the weight of the object, only on weight of displaced fluid
Definition
 Archimede's principle
Term
 increase in pressure with increase in depth creates this upward force
Definition
 buoyant force
Term
 as the velocity of a fluid increases, the pressure exerted by that fluid decreases
Definition
 Bernoulli's principle
Term
 flow of fluids around objects
Definition
 streamlines
Term
 Objects require less energy to do what?
Definition
 move through a smooth, streamlined flow
Term
 When a solid is heated, the KE of particles increase, and they vibrate rapidly and move far apart, weakening the attractive forces between the particles and this causes their separation to increase and steel highway bridges to allow for the expansion of parts in summer heat
Definition
 thermal expansion of solids
Term
 used in thermostats, usually brass and iron welded together and when heated, brass expands more than iron, so brass becomes longer and strip bends with brass and as it cools bends wit iron
Definition
 bimetallic strip
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