# Shared Flashcard Set

## Details

Final
Final material
65
Physics
12/17/2008

Term
 scalar
Definition
 just a quantity (10 miles)
Term
 derived quantity
Definition
 flow from fundamental quantities (speed m/s)
Term
 A vector includes two components ...
Definition
 a magnitude and a direction
Term
 displacement
Definition
 directly from beginning point to end point (flying to UD arena from school)
Term
 doubling equation
Definition
 %/changer per year
Term
 inertia
Definition
 resistance to change
Term
 Newton's First Law of Motion
Definition
 An object in motion tends to stay in motion just as an object at rest tends to stay at rest (inertia)
Term
 Newton's Second Law of Motion
Definition
 F=ma or Force= mass x acceleration
Term
 acceleration
Definition
 changer in velocity/time
Term
 weight
Definition
 weight = mass x acceleration (gravity)
Term
 Newton's Third Law of Motion
Definition
 For every action there is an equal and opposite reaction
Term
 momentum
Definition
 inertia of motion (mass x speed)
Term
 impulse
Definition
 force that acts x the length of time
Term
 power equation
Definition
 work/time
Term
 If the weight is 83.7 kg, and it is in free fall for 10 meters, what is its work?
Definition
 83.7 kg x 10 m/s = 837 Newtons....then 837 N x 10 m = 8370 joules
Term
 What is the power of a 8370 joules for 5 seconds?
Definition
 8370 joules/5 sec = 1674 watts
Term
 Kinetic Energy
Definition
 energy of motion
Term
 potential energy
Definition
 energy that is stored in an object
Term
 internal energy
Definition
 the random, disordered motion of molecules
Term
 internal energy
Definition
 the random, disordered motion of molecules
Term
 internal energy
Definition
 the random, disordered motion of molecules
Term
 Work Energy Theorem
Definition
 Work Done = the change in KE
Term
 Kinetic Energy equation
Definition
 1/2 mass x (velocity)^2
Term
 Newton's Universal Law of Gravitation
Definition
 M1(mass 1) and M2(mass 2) seperated by a distance (d)M1xM2/d^2
Term
 heat
Definition
 the flow of energy
Term
 thermodynamics
Definition
 how to turn heat transfer into work
Term
 temperature
Definition
 measure of the average translational KE per molecule (the hotter something is, the faster the molecules move)
Term
 1 calorie
Definition
 the energy needed to raise the temperature of 1 gram of H20 by 1 degree centigrade
Term
 heat conduction
Definition
 flow of energy by molecular collisions
Term
 Convection
Definition
 Heat transfer by "mass motion"
Term
Definition
 charging atoms to become electromagnetically charged for heat transfer
Term
 Magnetic Domain
Definition
 Region within a material where the magnetic moments are aligned in the same direction
Term
 polarized charge
Definition
 separated opposite charges in an object
Term
 Induction
Definition
 Charging an atom without contact (opposite charges attract)
Term
 charging by friction
Definition
 when two objects rub together one is more likely to leave more charged while the other is less charged...
Term
 Charging by contact (conduction)
Definition
 When a charged object touches a neutral object and transfers its charge to the neutral object
Term
 resonance
Definition
 forced vibrations, at the natural frequency, enlarge amplitude vibrations
Term
Definition
 A coil of wire moved into a magnetic field, a voltage (electric field present) will be induced in the wire.
Term
 Electric field direction (north and south pole)
Definition
 Negative fields originate at the North Pole and terminate on South Pole
Term
 Albert Einstein
Definition
 the theory of a photon
Term
 photon
Definition
 a bundle of light energy (energy of a photon = the frequency)
Term
 excitation
Definition
 an electron at a lower level makes a jump to a higher energy level
Term
 fluorescence
Definition
 excitation by absorption of photons & de-excitation by emission of photons(emits red photon absorbs blue photon)
Term
 Planck
Definition
 Formulated the energy of a photon by creating incandescence light.
Term
 Planck's constant
Definition
 E(energy)=h(Planck's Constant)x f (frequency)Planck's Constant = 6.676 x 10^-34
Term
 wavelength
Definition
 the distance between two crests (in meters)
Term
 frequency
Definition
 the number of crests (waves) that pass by a given point in space in a second. The number of cycles a wave completes in a second.
Term
 amplitude
Definition
 the maximum displacement of a wave
Term
 Period
Definition
 1/frequency (The period of time is takes to complete one cycle of the wave)
Term
 wave velocity
Definition
 how fast the wave is travelingv(velocity)= wavelength x frequency
Term
 node
Definition
 a point on the wave of zero disturbance
Term
 transverse wave
Definition
 a wave that is perpendicular to the direction the wave is traveling
Term
 longitudinal wave
Definition
 a wave that travels in the direction of its disturbance (a sound wave pressurizes the air and travels through the region of less density
Term
 interference
Definition
 when two water waves come together to occupy the same space.
Term
 diffraction
Definition
 the bending of a wave
Term
 destructive interference
Definition
 when two like waves collide to combine one wave thus eliminating one of the waves
Term
 Louis de Broglie
Definition
 a particle is a wave
Term
 photoelectric effect
Definition
 Einstein's explanation that when more energetic light hit an object that object will emit electrons
Term
 electron
Definition
 1000 times lighter than protons and possess a negative charge
Term
 proton
Definition
 heavier than electrons and possess positive charges
Term
 Coulomb's Law
Definition
 The force between two charges is proportional to the product of the charges divided by the square of the distance between them
Term
 Coulomb's Law vs. Universal Law of Gravitation
Definition
 Gravity is a much weaker force and electrons have a much stronger force upon each other
Term
 magnetic fields source
Definition
 moving charges
Term
 magnetic domains
Definition
 spots where the dipoles are lined up in a general way
Term
 entropy
Definition
 disorder
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