# Shared Flashcard Set

## Details

Final
MARIA ROWE
103
Physics
05/25/2006

Term
 When you throw a ball into the air its mechanical energy at any point is the ______ in its kinetic energy and gravitational potential energy
Definition
 SUM
Term
 As an object falls toward Earth, the gravitational potential energy of the object _______1
Definition
 decreases
Term
 The total amount of energy in an isolated, closed system ________
Definition
 remains constant
Term
 A system that does not lose or gain mass is a _________
Definition
 closed system
Term
 The ability of an object to produce a change in itself or its surroundings is _____
Definition
 Energy
Term
 The total increase in the thermal energy of a system is the work done on it______ the heat addedd to it
Definition
 plus
Term
 An increase in the average kinetic energy of particles means an ________ in temperature
Definition
 increase
Term
 convection typically takes place in _______
Definition
 fluids (gasses AND liquids)
Term
 A thermometer is used to measure ______
Definition
 TEMPERATURE (not heat)
Term
 the measure of hotness of an object is
Definition
 Temperature
Term
 a heat engine continously converts
Definition
 Thermal energy to mechanical energy
Term
 Energy that flows as a result of a difference in temperature is called
Definition
 Kinetic Energy
Term
 Two objects are in thermal equilibrium if they
Definition
 Have the same thermal energy
Term
 Pressure is equal to
Definition
 Force divided by area
Term
 the SI unit of pressure is the
Definition
 Pascal
Term
 According to pascal's principle a change on a confined fluid _____
Definition
 is transmitted unchanged throughout the fluid
Term
 the buyoant force exerted on an object immersed in a fluid is equal to the ________
Definition
 weight of the displaced fluid
Term
 According to Bernoulli's principle, as the velocity of a fluid increases, the __________
Definition
 Pressure of the fluid decreases
Term
 A crystal lattice is a characteristic of many_____
Definition
 Solids
Term
 An object that is deformed by a force and returns to its original form when the force is removed is exhibiting the property of ______
Definition
 elasticity
Term
 The ______ is the state of matter in matter in which electrons have been torn away from the atoms
Definition
 Plasma
Term
 the ____ forces within a liquid account for surface tension
Definition
 cohesive
Term
 _____ transmits energy without transferring matter
Definition
 waves
Term
 The time interval during which wave motion repeats is the ________
Definition
 Period
Term
 The number of vibrations per second is the _________
Definition
 frequency
Term
 The speed of any mechanical wave depends on _______
Definition
 The medium through which it travells
Term
 when light from the air enters a body of water, in what form does some of the energy move back into the air
Definition
 Reflected Wave
Term
 this may be produced during destructive interference of waves
Definition
 a node
Term
 The change in wave direction at the boundary of two different media is ______
Definition
 refraction
Term
 The spreading of waves around the edge of a barrier is ______
Definition
 Diffraction
Term
 Increasing the amplitude of a wave _____ the rate of energy
Definition
 increases
Term
 Frequency is ______ related to period
Definition
 inversely
Term
 wavelength is measured in ______
Definition
 meters
Term
 the ____ is a line at a right angle to the barrier
Definition
 Normal
Term
 the outermost structure of the human ear that is used to collect sound waves is called the ______
Definition
 pinna
Term
 Tonal quality or tone color is also called ______
Definition
 timbre
Term
 For a __________ resonator a colum of length 1/2 will resonate with a tuning fork
Definition
 Open pipe
Term
 The frequency of a beat is the _____________ of the frequencies of the 2 waves that produce it
Definition
 absolute vaue of the difference
Term
 A sound specctrum of an instrument is a graph of wave amplitude versus _____
Definition
 Frequency
Term
 The ear detects ____ vvarations as sound
Definition
 Pressure
Term
 in a ___ pipe the reflected wave is inverted
Definition
 OPEN
Term
 Sound level is measured in _____
Definition
 Decibels
Term
 Echoes demonstrate this behavior of sound waves
Definition
 Reflection
Term
 Sound is an example of ______ wave
Definition
 longitudinal
Term
 The amplitude of sound as measured on a logarithmic scale is called ______
Definition
 sound level
Term
 a detected apparent change in the pitch caused by the motion of a sound source or of an observer is called _____
Definition
 dopler shift
Term
 The pitch of a sound depends most directly upon the sound's
Definition
 Frequency
Term
 If two notes have a frequeny ratio of 1:2 the notes differ by an ______
Definition
 octave
Term
 the lowest frequency that will resonate in a pipe is the ______
Definition
 fundamental
Term
 A pleasent combination of pitches is called ______
Definition
 consonance
Term
 An oscillation of wave amplitude caused by the sounding of two nearly identical frequencies is called a _____
Definition
 beat
Term
 pitch is measured in
Definition
 Hertz
Term
 period is measured in
Definition
 Secconds
Term
 Speed is measured in
Definition
 meters per seconds (m/s)
Term
 loudness is measured in
Definition
 DECIBELS
Term
 electrical force is a vector quanity because it has magnitude and _____
Definition
 direction
Term
 An electrical field is equal to _______
Definition
 force per unit charge
Term
 As an elecctric field becomes stronge, the field lines should be drawn _____
Definition
 Closer together
Term
 As an electric field becomes stronger the field lines should be drawn _____
Definition
 Thicker
Term
 a good device to indicate electric field lines is a ________
Definition
 Van de Graff machine
Term
 with two _____ charges you must do work to pull one charge away from the other
Definition
 unlike
Term
 Robert Millikan determined the charge of a _______ to be 1.6 x 10^-19 C
Definition
 Proton
Term
 touching an object to the earth to elimate excess charge is _______
Definition
 grounding
Term
 The charges on a hollow conductor are found on the _____ surface
Definition
 outer
Term
 A ____ is made up of two conductors seperated by an insulator
Definition
 Capacitor
Term
 A charge pump created a flow of charged particles, or ________
Definition
 electric current
Term
 A closed loop thruogh which charges can flow is an ____________
Definition
 electric current
Term
 When a water wheel drives a generator the generator converts the ________energy of the water into electric energy
Definition
 Kinetic
Term
 The unit used to measure the rate of flow of electric current is an ________
Definition
 ampere
Term
 the ______ of a conductor an be determined in potential difference and current are known
Definition
 Resistance
Term
 a device that has constant resistance and appears to be independent of the _______ is said to obey Ohm's Law
Definition
 potential difference
Term
 The current flowing in an electric circut can be increased by ______
Definition
 Increasing voltage or decreasing resistance
Term
 A device that can measure the amount of current in a circut is an ________
Definition
 ammeter
Term
 Electricity is carried long distance at high voltages because _____
Definition
 this reduces current and less power is lost as thermal energy
Term
 Utility companies measure energy used in _______
Definition
 Kilowatt-hours
Term
 Albert Einstein described light as if it consisted of ______
Definition
 Quanta
Term
 Photocells are part of
Definition
 Scanners, Cd players, digital cameras...ect
Term
 A photocell is A device that converts light energy into ________
Definition
 electrical energy
Term
 photoelectrons are electrons that have been liberated from a metal by ______
Definition
 exposure to light
Term
 light shows properties of
Definition
 particles AND waves
Term
 the amount of current flowing in photocells is porpotional to _____
Definition
 The intensity of light
Term
 A tv remote emits
Definition
 infared light
Term
 Analog recording technology has limited fidelity because
Definition
 It cant capture the full range of sound
Term
 the term Digital refers to _____
Definition
 the use of 0's and 1's
Term
 All optical discs _______
Definition
 use laser beams to reproduce info
Term
 a DvD can _____ than a Cd
Definition
Term
 light modulation refers to the process of ______
Definition
 Transmitting information in pulses of light
Term
 infared light ____ the range of transmission
Definition
 increases
Term
 ______ occurs when 2 waves occupy the same space at the same time
Definition
 interference
Term
 thin film interference occcurs when light is reflected from _____ and ____ of the thin film surface
Definition
 top and bottom
Term
 Soap bubbles are an example of _____
Definition
 thin film interference
Term
 quality camera lenses are coated with thin films to _____ the loss of light due to reflection
Definition
 Decrease
Term
 ____ is a method of recording an interference pattern
Definition
 holography
Term
 Waves transmit energy without transporting _____
Definition
 mass
Term
 nodes are ____ points in a medium
Definition
 stationary
Term
 after a waves passes through a medium the medium _____
Definition
 returns to its previous condition
Term
 structural colors are produced by _______
Definition
 interference
Term
 Iridescense refers to dependance of color on ________
Definition
 viewing angle
Term
 photonic crystals are in nature....they are caused by _____
Definition
 3D perioic structure of the crystals
Term
 Iridescence due to multilayer structure depends on the _____ and ____ of the layers
Definition
 thickness and spacing
Term
 a CD may be used to _____ light
Definition
 DIFFRACT light
Term
 on a thin soap film it appears dark because ____ of the light is reflected
Definition
 None
Term
 the human eye can see _____ of the electromagnetic spectrum
Definition
 a small portion
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