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78 Cards in this Set
- Front
- Back
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Average Acceleration
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ΔV / Δt
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Final Velocity
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Vi + at
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Displacement
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ΔX = Vi*t + 1/2(at^2)
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Final Velocity
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Vf^2 = Vi^2 + 2aΔX
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Average Velocity
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1/2 (Vi + Vf)
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Gravitational Force
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F = (G*m1*m2)/r^2
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Torque
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τ = rFsinθ
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Kinetic or Static Friction
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F(friction)≤ μ * N
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Centripital Acceleration
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(velocity)^2 / (radius)
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Centripital Force
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Mass * Acceleration
or (mass)(velocity)^2 / (radius) |
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Work
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F d cosθ
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Power
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Work/time
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Kinetic Nrg
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KE = 1/2 (mass)(velocity)^2
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Potential Nrg
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U = mass * gravity * height
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momentum
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p = mass * velocity
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Impulse
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Δp = Force * time
or m*Vf - m*Vi |
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Celsius
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C = K -273
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Thermal Expansion
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ΔL = α L ΔT
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Volume Thermal Expansion
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ΔV = β V ΔT
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Heat Gained (Q)
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Q = m c Δt
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Heat Gained (Δphase)
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Q = m * L
(L=heat of transformation constant) |
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1st Law of Thermodynamics
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ΔU = Q - W
(Q=heat nrg and W=work) |
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2nd Law of Thermodynamics
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ΔS of closed system will increase or remain unchanged
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Density
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ρ = mass / volume
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Pressure
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P = Force / Area
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Absolute Pressure
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Pabs= Patm + ρgh
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Two Pistons
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F1/A1 = F2/A2
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Boyant Force
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FB= ρ g V (where V is the volume of the object and ρ is the density of the liquid)
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Velocity in different areas of a pipe (volume flow rate)
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A1V1=A2V2
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Stress
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F/A
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Strain
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ΔL/L
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Y (Young's Modulus)
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Y= (F/A) / (ΔL/L)
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Coulomb's Law (Force b/n charges)
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F = (k*q1*q2) / r^2
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Electric Field
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E = k*q / r^2
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Force of E Field on a charge
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F = q * E
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Electric potential
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V = kq / r
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Electric Potential Nrg
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U = qV
(charge * voltage) |
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Force of B Field on charge
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q v B sinθ
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Current
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I = Δq / Δt
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Force of Wire with current
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F = I L B sinθ
(current*length*Bfield) |
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B field created by long straight wire
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B = (μo*I) / (2πr)
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B field created by loop wire
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B = (μo * I) / (2r)
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Voltage
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V = IR
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Power in circuits
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P = IV
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Resistors in series
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Rs = R1 + R2 ...
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Resistors in Parallel
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1 / Rp = 1/R1 + 1/R2 ...
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Capacitance
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C = Q / V
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E field b/n capacitor plates
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E = V / d
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Capacitors in series
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1 / Cs = 1/C1 + 1/C2 ...
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Capacitors in Parallel
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Cp = C1 + C2 ...
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Irms
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Imax / sqroot2
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Vrms
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Vmax / sqroot2
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Imax
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Irms * sqroot2
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Vmax
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Vrms * sqroot2
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Hookes Law (Force of spring)
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F = -k x
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angular freq of spring
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ω = sq root (k/m)
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angular freq of pendulum
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ω = sq root (g/L)
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Frequency
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F = 1 / T
T=period |
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Period of Spring
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T = 2π sqroot(m/k)
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Period of Pendulum
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T = 2π sqroot (L/g)
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Velocity of wave
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V = fλ
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Speed of Light
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c = 3x10^8
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Intensity
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I = Power / area
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Object and image formula
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1/o + 1/i = 1/f = 2/r
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Focal length
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F = radius curve / 2
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Magnification
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m = -image distance / object distance
or -i / o |
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Index of Refraction
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n = c / v
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Snell's law of refraction
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n1 sinθ1 = n2 sinθ2
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Lens Power
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P = 1 / f
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Photon Nrg
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E = h f
or E = hc/λ h= 6.6x10^-34 J*s h= 4x10^-15 eV |
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Binding Nrg
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E = Δm c^2
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Alpha Particle decay
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-4
-2 |
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-Beta decay
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+0
+1 |
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+Beta decay (positron)
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-0
-1 |
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Gamma decay
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nothing!!
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1/2 life formula
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Nf = Ni * e^(λt)
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Capacitance
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C = k*(perm. free space)* (A/d)
A=area d=distance b/n plates |
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Work done by gas expansion
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W = P*ΔV
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