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SCS 110 Exam -2 (1).
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- HSCO 502 Human Growth & Develop. Q
SCS 110 Exam -2 (1).
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SCS 110 Exam #2Work - ANS-product of the force and the distance moved
W=fd
Gravitational potential energy - ANS-Posessed by an object at some height
PEg=mgh
Kinetic energy - ANS-Moving mass
KE=1/2mv^2
Energy - ANS-the most fundamental concept in the present physical theory
Law of conservation of energy - ANS-The amount of energy always remains the same
Total energy initial + work added - dissipated energy = Total energy final
Potential Energy of a Spring - ANS-PEx=1/2kΔx^2
Dissipative forces - ANS-friction and air resistance
Power - ANS-the rate at which a device is delivering of using energy
change in energy divided by the time required
kilowatt - ANS-one kW is 1000 watts
Temperature measurements - ANS-Fahrenheit (°F=9/5°C+32)
Celcius
Kelvin (K=°C+273)
Heat - ANS-that which passes from a hot object to a cold object
measured in calories
ΔQ=mCΔT - ANS-ΔQ=amount of heat put into the object
m=mass in grams
C=heat capacity
ΔT=change in temperature
Heat capacity of water - ANS-1.00 cal/g°c
James Joule - ANS-showed that heat was another form of energy
, KE --> HE - ANS-100% efficiency
Max efficiency - ANS-Max Eff= 1- (Tc/Th)
*Temp is measured in Kelvin
When we start with neat energy, we can NEVER convert 100% of it to other forms of energy.
Count Rumford (Benjamin Thompson) - ANS-disproved caloric
Lord Kelvin (William Thompson) - ANS-1st and 2nd laws of thermodynamics
Carnot engine - ANS-theoretical heat engine that releases cold/waste heat
Carnot Theory - ANS-theory oh hear engines, all has to throw away heat
Practical heat engines and real devices - ANS-old-type steam engine
gasoline internal combustion engine
diesel internal combustion engine
steam turbine
Earth's weather patterns and water cycle
Coulomb - ANS-(C) is the standard metric unit for charge
Voltage - ANS-(v) defined as the work that is actually done in moving a charge from point A to
point B, divided by the size of the mobile charge, q.
measured in volts (v)
Charge - ANS-(q) measured in coulombs
Current - ANS-(i) measured in Amps
Power (P) - ANS-measured in Watts (W)
Electrical Energy (EE) - ANS-measured in Joules (J) or kilowatt hours (KWH)
Electrical devices - ANS-battery (electrochemical cells)
resistors (heating elements)
lamps and light bulbs
photovoltaic cells
motors and generators
Wavelength - ANS-λ
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