SAT2 物理考试 有公式表吗？
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| sat2物理考试常用公式 |
| 紫铭教育 |
| sat ii物理力学常见公式physics formulas - mechanics kinematics formulas the kinematic equations apply to one-dimmensional motion with costant acceleration from point 1, situated d1 from a point of reference to point 2, situated d2 from the same point of reference. v1 is the velocity at point 1 and v2 is the velocity at point 2. v2 = v1 + a·t d2 = d1 + (v1 + v2)·t/2 d2 = d1 + v1·t + a·t2/2 d2 = d1 + v2·t - a·t2/2 v22 = v12 + 2a(d2 - d1) average velocity: vav = δd/δt average acceleration: aav = δv/δt rotational kinematics equations with constant angular acceleration: ω2 = ω1 + α·t φ2 = φ1 + (ω1 + ω2)·t/2 φ2 = φ1 + ω1·t + α·t2/2 φ2 = φ1 + ω2·t - α·t2/2 ω22 = ω12 + 2α(φ2 - φ1) average angular velocity: ωav = δθ/δt average angular acceleration: αav = δω/δt frequency: f = ω/2π period: t = 2π/ω relations between angular and linear variables: l = φ·r v = ω·r a = α·r -------------------------------------------------------------- dynamics formulas pressure: p = f/a newton's second law: f = m·a force of kinetic friction: ff = μ·n hooke's law: f = -k·x centripetal force: fc = m·v2/r centripetal acceleration: ac = v2/r ----------------------------------------------------------------- work, energy, conservation laws formulas work: w = f · d = fdcos(α) potential energy: pe = m·g·h kinetic energy: ke = m·v2/2 mechanical energy: e = ke + pe instantaneous power: p = f·v the work-energy theorem: w = δke ------------------------------------------------------------- gravitation formulas newtonian gravity formula: fg = g·m·m/r2 kepler's third law: t2/a3 = ct. -------------------------------------------------------- sat ii物理热力学常见公式physics formulas - thermodynamics heat added or emoved: q = m·c·δt change in internal energy: δu = q - w boyle's law: p1v1 = p2v2 charles's law: v1/t1 = v2/t2 efficiency of a heat engine(%): e = (w/qhot)·100 sat ii物理光波学常见公式physics formulas - waves and optics snell's law: n1·sin(θ1) = n2·sin(θ2) wave speed: v = λ·f velocity of light: v = c/n magnification: m = -di/do law of reflection: θreflection = θincidence mirror and lens equation: 1/d1 + 1/d1 = 1/f ------------------------------------------------------------ sat ii物理现代物理常见公式physics formulas - modern physics the energy of a photon: e = h·f matter wavelength: λ = h/p relativistic factor: γ2 = 1/(1 - v2/c2) de broglie wavelength: λ = h/(mv) half life of radioactive material: thalf = ln(2)/λ mass energy equivalence: e = mo·c2 ----------------------------------------------------------------- sat ii物理电磁学常见公式physics formulas - electricity and magnetism electric fields and forces formulas coulomb's law: f = k·q1·q1/r2 electric field of a charge q: e = k·q/r2 work done by electric field: w = q·e·d electric field between two metallic plates: e = v/d ---------------------------------------------------------- dc circuits formulas ohm's law: v = i·r power dissipated in a resistor: p = i·v = v2/r = r·i2 resistance: r = ρ·l/a equivalent resistance of series resistors: rs = r1 + r2 +... equivalent resistance of parallel resistors: 1/rp = 1/r1 + 1/r2 +... equivalent capacitance of series capacitors: 1/cs = 1/c1 + 1/c2 +... equivalent capacitance of parallel capacitors: cp = c1 + c2 +... -------------------------------------------------------------- magnetic fields and forces formulas magnetic force on a moving charge: f = q(v x b) = q·v·b·sin(θ) magnetic force on a current carrying wire: f = i·l·b·sin(θ) magnetic field created by a current: b = (μo/2π)·(i/r) faraday's law: e = -dφ/dt
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