# Shared Flashcard Set

## Details

thermodynamics/ vibe & waves
mondays test
74
Physics
04/19/2008

Term
 infernal
Definition
 energy can be used to do work
Term
 heat & work
Definition
 energy transferred to or from a system
Term
 transit
Definition
 heat and work always refer to energy in ___________
Term
 system
Definition
 a set of particles of interacting components considered to be a distinct physical entity for the purpose of study.
Term
 enviroment
Definition
 the combination of conditions and influences outside of a system that affect the behavior of the system
Term
 pressurevolume, change
Definition
 work done on or by a gas is __________ multiplied by _________& ____________
Term
 force
Definition
 pressure is a meausre of how much _______is applied over a given area
Term
 p=f/a
Definition
 pressure equals force divided by area
Term
 equal
Definition
 change in force is ____ to area multiplied by displacement
Term
Definition
 volume equals area multipled by displacment
Term
 w=p[delta]v
Definition
 work=pressure times volume change
Term
 isovolumetric process
Definition
 no work is done
Term
 isovolumetric process. isothermal prrocess. adiabatic process
Definition
 the 3 thermodynamic processes
Term
 isovolumetric process
Definition
 thermodynamic process that takes place at constant volume so that no work is done on or by the system
Term
 isothermal process
Definition
 a thermodynamic process taht takes place at constant temperature
Term
Definition
 a thermodynamic process during which no energy is transferred to or from the system as heat
Term
 constant
Definition
 infernal energy is ______ in a constant temperature process
Term
 transferred
Definition
 Energy is not______ as heat in an adiabatic process
Term
 are accompanied by an increase in entropy of the universe
Definition
 all spontaneous processes
Term
 cant transfer all energy as heat to do work
Definition
 a heat engine
Term
 1. substance absorbs energy as heat from a high temp resevoir2. work is done by the engine3. energy is expelled as heat to a lower temp resevoir
Definition
 heat engines cyclic process
Term
 the second law of thermodynamics
Definition
 no cyclic process that converts heat entirely into work is possible
Term
 equal to high temperature
Definition
 in a cyclyic process, work can never be
Term
 heat
Definition
 some energy must always be transferred as ________to the systems surroundings
Term
 efficiency
Definition
 measures how well an engine operates
Term
 cyclicheatlowhighwork
Definition
 a _____process cant completely convert energy transferred as heat into work, nor can it transfer energy as ______, from a _____-temperature body to a ________- temperature body without ______ being done in the process
Term
 equation for the efficiency of a heat engine
Definition
 eff=Wnet/Qn=Qn-Qc/Qn=1-Qc/Qh
Term
 entropy
Definition
 a measure of the randomness of disorder of a system
Term
 disorder
Definition
 the greater the entropy of a system is, the greater the systems _______
Term
 there is less energy to do work
Definition
 greater disorder means
Term
 increases in all natural processes
Definition
 the entropy of the universe....
Term
 W=0
Definition
 no work is done
Term
 Q<0
Definition
 energy is removed from system as heat
Term
 Q>0
Definition
 energy added to system as heat
Term
 W<0
Definition
 work done on a system [compression of gas]
Term
 w>0
Definition
 work done by system [expansion of gas]
Term
 maximum
Definition
 at equilibrium position, speed reaches a______
Term
 spring force & acceleration
Definition
 at maximum displacement, ____& ______ reach a maximum
Term
 restoring force, displacement
Definition
 in simple harmonic these are proportional to one another
Term
 hookes law
Definition
 states that restoring force is directly proportional to the displacement of the mass
Term
 Felastic= -kx
Definition
 spring force = -(spring constant x displacement)
Term
 restoring force
Definition
 a spring force that always pushes or pulls the mass toward its original equilibrium position
Term
 simple harmonic motion
Definition
 vibration about which an equilibrium position in which a restoring force is proportional to the displacement from equilibrium.
Term
 elastic potentioal energy
Definition
 a stretched or compressed spring has....
Term
 gravitational potential
Definition
 increases as a pendulums displacement increases
Term
 superposition
Definition
 when waves overlap
Term
 constructive interference
Definition
 waves come together and go their seperate ways and disperse unchanged
Term
 destructive interference
Definition
 two displacements are added and the resultant wave is the difference between the two pulses
Term
 complete destructive interference
Definition
 when the two waves cancel out
Term
 compression
Definition
 particles close together
Term
 rarefaction
Definition
 particles pulled apart
Term
 standing waves
Definition
 occur when two waves of the same frequency, wave length, and amplitude travel in opposite directions and interfere.
Term
 nodes
Definition
 stationary points that dont change
Term
 antinodes
Definition
 the hightes amplitudes where the largest displacement occurs, directly between the nodes.
Term
 medium
Definition
 what waves travel through
Term
 mechanical waves
Definition
 ________need a medium to travel on
Term
 pulse wave
Definition
 single traveling pulse
Term
 periodic wave
Definition
 waves motion goes up and down
Term
 sine wave
Definition
 a special periodic wave in which the periodic motion is also simple harmonic
Term
 transverse wave
Definition
 a wave that makes vibrations perpendicular to the direction of the wave motion
Term
 waveform
Definition
 picture that represents every point of the wave in one moment in time, or 1 particular point of the wave as time passes
Term
 crest
Definition
 highest pont above the equilibrium positive
Term
 trough
Definition
 the lowest point below the equilibrium positive
Term
 longitudinal wave
Definition
 this type of wave occurs wehn the force on the wave is parallel with the motion of the wave
Term
 the first law of thermodynamics
Definition
 the principle of energy conservation that takes into account a systems internal energy as well as work and heat
Term
 first law of thermodynamics simplified
Definition
 energy is neither created nor destroyed only transferred and changed.
Term
 [delta]u= Q- W
Definition
 change in systems internal energy= energy transferred to or from system as heat
Term
 cyclic process
Definition
 a thermodynamic process in which a system returns to the same conditions under which it started
Term
 an isothermal process [all energy is transferred as work or heat]
Definition
 a cyclic process resembles
Term
 net change in the systems intenal energy
Definition
 the process can be repeated with no
Term
 amplitude
Definition
 max displacement from equilibrium
Term
 period
Definition
 time it takes to complete a whole cycle or wave oscillation to occur;
Term
 frequency
Definition
 the number of cycles or vibrations per unit of time; also the number of waves produced per unit of time.
Term
 Hertz
Definition
 frequency is meausred in
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