# Shared Flashcard Set

## Details

IB Physics SL
Final Review
50
Physics
05/19/2010

Term
 T or F: 1C=1K
Definition
 True
Term
 T or F: You can have a negative Kelvin temperature?
Definition
 False
Term
 What temperature is the classroom?
Definition
 295K
Term
 If a container of gas at 1 atm is compressed to 1/3 its volume, what is the new pressure?
Definition
 3 atm
Term
 If pressure on a gas is tripled, volume is ________.
Definition
 reduced by one-third
Term
 Why does an increase in volume correspond to a decrease in pressure?
Definition
 Because the molecules strike the container wall less often.
Term
 T or F: The number of molecules in a mole of a substance is the same for all substances.
Definition
 True
Term
 If the number of molecules in a container doubles, its pressure _____.
Definition
 doubles
Term
 If both pressure and volume of a gas double, its Kelvin temperature must _______.
Definition
Term
 If the temperature of a gas increases slightly, what happens to its volume?
Definition
 Also increases slightly
Term
 If a gas is compressed to 1/2 volume, does the speed of the molecules change?
Definition
 No
Term
 The absolute temperature of a gas is directly proportional to its __________.
Definition
 kinetic energy
Term
 T or F: Because oxygen is 16 times more massive than hydrogen, it has more kinetic energy.
Definition
 False
Term
 What is the smallest unit of heat energy?
Definition
 Joule
Term
 What is the measure of the average kinetic energy of individual molecules?
Definition
 temperature
Term
 The internal energy of an ideal gas depends on its ______.
Definition
 temperature
Term
 Why don't ocean temperatures vary drastically?
Definition
 Water has a relatively high specific heat.
Term
 T or F: Temperature changes during a phase change.
Definition
 False
Term
 What is the heat required to change a substance from a solid to a liquid called?
Definition
 heat of fusion
Term
 What is the heat required to change a substance from a liquid to a vapor?
Definition
 heat of vaporization
Term
 T or F: Heat energy enters a substance when it melts.
Definition
 True
Term
 T or F: Heat energy leaves a substance when it freezes.
Definition
 True
Term
 T or F: Heat energy leaves a substance when it evaporates?
Definition
 False
Term
 T or F: Heat energy enters a substance when it condenses.
Definition
 False
Term
 Why would a piece of metal feel colder on a cold day than a piece of wood?
Definition
 It has more thermal conductivity.
Term
 What is the process whereby heat flows by means of molecular collisions called?
Definition
 conduction
Term
 T or F: Isothermal means "change in temperature".
Definition
 False
Term
 What is it called when a gas exchanges no heat with its surroundings?
Definition
Term
 T or F: Isobaric means "no change in pressure".
Definition
 True
Term
 Is it possible to transfer heat from a cold reservoir to a hot one?
Definition
 Yes, but work will have to be done.
Term
 If an atom has more electrons than protons, it is a _____.
Definition
 negative ion
Term
 If electrons are tightly bound to the nuclei, the material is an ______.
Definition
 insulator
Term
 If electrons are loosely bound to the nuclei, the material is a _______.
Definition
 conductor
Term
 What are the units for a Coulomb?
Definition
 Nm^2/C^2
Term
 If the charges of two objects are doubled, the force between them _________.
Definition
Term
 T or F: Electric charge is a vector.
Definition
 False
Term
 Can a zero electric field exist?
Definition
 No
Term
 T or F: Electric potential is a vector.
Definition
 False
Term
 One J/C is also one ____.
Definition
 volt
Term
 For a proton moving in the direction of the electric field, its potential energy ______ and its electric potential ________.
Definition
 decreases, decreases
Term
 One C/V =
Definition
Term
 An electron-volt is a unit of ______.
Definition
 energy
Term
 T or F: Work is required to move along an equipotential surface.
Definition
 False
Term
 1 C/s =
Definition
 ampere
Term
 T or F: The resistivity of a wire depends on its material.
Definition
 True
Term
 1 W =
Definition
 1 V*A
Term
 1 kW/h =
Definition
 3,600,000 J
Term
 T or F: When resistors are in series, the current flowing in each one is the same.
Definition
 True
Term
 T or F: Emf is when no current flows to an external circuit.
Definition
 True
Term
 T or F: All electromagnetic waves travel through a vacuum at the same speed.
Definition
 True
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