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26 Cards in this Set
- Front
- Back
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What are the Kinematics Formulas?
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Vf = Vo + at
Vf^2 = Vo^2 + 2a ΔX ΔX = Vot + (1/2)at^2 ΔX = (1/2)(Vf - Vo)t |
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Is total mechanical energy constant if the only forces acting on a body are conservative?
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Yes
E = K + U = Constant |
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What are the work and internal energy formulas for an Isobaric process?
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W = -PΔV
ΔU = Q - PΔV (as the system expands, W<0 , the system has done work) (example - weighted piston) |
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What are the work and internal energy formulas for an isochloric process?
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(isovolumetric)
W = 0 ΔU = Q (because no work is done to or by the system, ΔU = heat absorbed) (example - constant V thermometer) |
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What are the work and internal energy formulas for an isothermal process?
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W = -Q
ΔU = 0 (work done by the system is equal to the heat absorbed by the system) |
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What are the work and internal energy formulas for an adiabatic process?
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W = ΔU
Q = 0 (since the system exchanges no heat, the change in volume is related only to a change in temperature) |
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What is the formula for the first law of thermodynamics?
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ΔU = (heat energy gained) - (work done by the system)
ΔU = Q - W |
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Electric Field = ?
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E = k(q/r^2)
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Electric Field Force =
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F = qE
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What are the units of an electric field?
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(newtons/couloumb) or (volts/meter)
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What are the units of voltage
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(joules/coulomb) or Volts
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Electric potential =
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V = k(q/r)
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Electrical potential energy =
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U = qv
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Zeroth law of thermodynamics
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a system is in thermal equilibrium when it experiences no net change in thermal energy
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second law of thermodynamics
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ΔS = ΔQ/T
the entropy of the universe is spontaneously increasing - thermal energy will flow toward equilibrium |
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Magnetic field created by a long straight wire
B = |
B = (uo I) / (2 pi r)
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Magnetic field created by a wire loop
B = |
B = (uo I) / (2r)
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Electrical Power
P = |
(I^2 R) , (I V) , (V^2 / R)
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What are Kirchoff's Laws?
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1 - Current is conserved in a circuit
2 - the voltage drops = the voltage rises in a circuit |
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Electric field between capacitor plates
E = |
E = V / d
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Capacitance C =
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C = Q / V
C = Eo (A / d) |
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Hooke's Law
F = |
F = -kx
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angular frequency for a mass on the end of a spring? for a pendulum?
w = |
w = ((sqrt) k / m)
w = ((sqrt) g / L) |
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potential energy in simple harmonic motion
U = |
U = 1/2 k x^2
U(pendulum) = mgh |
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Period of a mass on a spring?
On a pendulum? |
T = 2 pi ((sqrt) m / k)
T = 2 pi ((sqrt) L / g) |
