# Shared Flashcard Set

## Details

Phusical Science Exam
suck
77
Physics
11/10/2009

Term
 Gravity
Definition
 the force of attraction between all masses in the universe
Term
 Projectile Motion
Definition
 any object projected by any means that continues in motion as a trajectory
Term
 satellite
Definition
 a projectile or small body that orbits another body
Term
 circular orbit
Definition
 a circular orbit is an elliptic orbit with the eccentricity equal to 0
Term
 elliptical orbit
Definition
 Kepler (an orbiting body as an ellipse, parabola, or hyperbola, which forms a two) orbit with the eccentricity greater than 0 and less than 1
Term
 big band theory
Definition
 the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature
Term
 density
Definition
 the amount of ammter per unit volume
Term
 pressure
Definition
 the ratio of force to the area over which the force is distributed
Term
 density equasion
Definition
 Density = mass/volumedensity equals mass over volume
Term
 pressure equasion
Definition
 pressure = force/areapressure equals
Term
 buoyancy
Definition
 is the upward force that exerts on an immersed object. The net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body. This force enables the object to float or at least seem lighter.
Term
 Boyle’s Law
Definition
 P1xV1=P2xV2
Term
 Atmospheric Pressure
Definition
 caused by the weight of air
Term
 Pascal’s Principle
Definition
 a change in pressure at any point in an enclosed fluid at rest is transmitted undiminished to all points in the fluid
Term
 Hydraulics
Definition
 fluid mechanics. Still conserves energy.
Term
 Bernoulli’s Principle:
Definition
 where the speed of a fluid increases, internal pressure in the fluid decreases
Term
 Random Motion
Definition
 temperature
Term
 Uniform Motion
Definition
 hydraulics, a pen, wind or Force
Term
 Thermal Energy
Definition
 the total energy of all of its atoms and molecules
Term
 Temperature
Definition
 tell how warm or cold an object is. Average kinetic energy per molecule in a substance
Term
 Absolute Zero
Definition
 coldest temperature theoretically possible. -273, 0K
Term
 Heat
Definition
 the thermal energy transferred from one substance to another due to a temperature difference between the 2 substances. Transfer of random motion
Term
 Heat Capacity
Definition
 quantity of heat required to change the temperature of a unit mass of the substance by 1 degree
Term
 Thermal Expansion
Definition
 liquids expand more than solids with increases in temperature. Expand when hot. Contract when cooled
Term
 Conduction
Definition
 occurs between particles and their immediate neighbors
Term
 Convection
Definition
 transfer by motion of a fluid
Term
Definition
 form of heating by transfer of radiant energy in the form of electromagnetic waves
Term
 Emission
Definition
 gives off
Term
 Absorption
Definition
Term
 Phase change
Definition
 whenever a substance changes its properties, or phase, energy is either given to the substance or taken away
Term
 Electric Charge
Definition
 an object having a negative charge. Like charges repel. Opposite charges attract.
Term
 Electron
Definition
 negatively charged moleculeProton: positively charged molecule
Term
 Proton
Definition
 positively charged molecule
Term
 Coulomb’s Law:
Definition
 the force between two charged particles varies directly as the product of their charges and inversely as the square of the separation distanceF=kq1q2/d^2
Term
 Charge Polarization:
Definition
 inducing an opposite charge
Term
 Current
Definition
 flow of electrons at a certain rate
Term
 Voltage
Definition
 difference in electrical pressure. PROVIDES PUSH (force) V=potential energy/charge
Term
 Resistance
Definition
 resisting the flow of electrons (ohm)
Term
 Resistance
Definition
 resisting the flow of electrons (ohm)
Term
 Ohm’s Law:
Definition
 the amount of a current in a circuit is directly proportional to the voltage across the circuit and inversely proportional to the resistance of the circuitCurrent=voltage/resistance
Term
 Ohm’s Law
Definition
 the amount of a current in a circuit is directly proportional to the voltage across the circuit and inversely proportional to the resistance of the circuitCurrent=voltage/resistance
Term
 Direct Current
Definition
 electrons flow in one direction
Term
 Alternating Current
Definition
 electrons flow initially in one direction and then in the opposite
Term
 Circuit
Definition
 any path which electrons can flow
Term
 Circuit
Definition
 any path which electrons can flow
Term
 Parallel
Definition
 devices and wires form branches each providing separate paths for electron flow
Term
 Series
Definition
 form a single pathway for electron flow
Term
 Electric Power
Definition
 the rate of energy transfer or rate of doing work. Power=currentxvoltage
Term
 Amplitude:
Definition
 distance from the midpoint to the crest or trough of the wave
Term
 Frequency:
Definition
 how frequent a vibration occurs f=waves/time
Term
 Period
Definition
 the time it takes for a complete vibration period=time/wave
Term
 Wavelength
Definition
 the distance from one crest to another
Term
 Wave speed
Definition
 the speed which waves pass a particular point wave
Term
 Transverse Wave
Definition
 a wave in which the medium vibrates in a direction perpendicular to the direction in which the wave travels. LIGHT
Term
 Longitudinal Wave:
Definition
 a wave in which the medium vibrates in a direction parallel to the direction in which the wave travels.
Term
 Sound Reflection
Definition
Term
 Sound Refraction:
Definition
 the bending of a wave through either a nonuniform medium or from one medium to another, caused by differences in wave speed.
Term
 Forced Vibration
Definition
 the setting up of vibrations in an object by a vibrating force
Term
 Natural Frequency:
Definition
 a frequency at which an elastic object naturally tends to vibrate, so that minimum energy is required to produce a forced vibration or to continue vibrating at that frequency
Term
 Resonance
Definition
 the response of a body when a forcing frequency matches its natural frequency
Term
 Sympathetic Vibration
Definition
 the vibration of one wave causes one close to it to vibrate too
Term
 Octave
Definition
 the interval between one musical pitch and another with half or double its frequency
Term
 Tone
Definition
 the high or low of a note. pitch
Term
 Interference
Definition
 the pattern formed by a superposition of different sets of waves that produces mutual reinforcement in some places and cancelation in others
Term
 Beat Frequency
Definition
 a series of alternate reinforcements and cancelations produced by the interference of two waves of slightly different frequency, heard as a throbbing effect in sound waves
Term
 Doppler Effect
Definition
 the change in frequency of wave motion resulting from motion of the wave source or receiver
Term
 Bow Wave
Definition
 the v-shaped wave produced by an object moving across a liquid surface at a speed greater than the wave speed
Term
 Shock Wave:
Definition
 the cone shaped wave created by an object moving at supersonic speed through a fluid
Term
 f= Gm1m2/r squared
Definition
 Gravity equation
Term
 Physics equationF=MA
Definition
 F
Term
 Density equationd=mv
Definition
 density =
Term
 pressure equationp=f/a
Definition
 p=
Term
 coulomb' law equation
Definition
 F = Kq1q2 / r squared
Term
 Ohm's law equationv=IR
Definition
 V =
Term
 Power equationP=IV
Definition
 P=
Term
 V =
Definition
 λf
Term
 1/t
Definition
 f=
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