sat2的物理考试_sat2物理难吗

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SAT2 物理考试 有公式表吗？

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/ΔtRotational 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/ωRelations 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

SAT2考试是什么，和SAT1有区别吗？国外一流大学看的SAT考试成绩是指什么？

SAT2是SAT subject test 的通常说法（学能倾向测验），SAT2考试有别于SAT1，它是一种专项考试，考察学生某一科目的能力。 目前SAT2分为数学、科学、语言、英语、历史与社会科学五大类，单科满分是800分。大部分的美国名校是需要有SAT2成绩的，一般是需要两门或三门。在需要SAT2成绩的学校中，对具体科目的要求又不尽相同，有的学校没有规定科目，有的则给出了相当难度的指定。

SAT1是就读美国名校本科的必考考试，其成绩作为重要的参考依据。在SAT1成绩非常优秀的基础之上，考生可以选考SAT2的两门或者三门（根据所选大学及专业的要求考，并非强制性考试）。SAT1考的是学生的学术能力。而SAT2考的是学生的单科能力。简单地说，SAT1成绩帮助学生申请美国名牌大学，而SAT2的成绩帮助学生申请个人喜欢的相关专业。

美国前50大学要求递交SAT1和托福成绩，大多数学校也要求SAT2成绩。

要根据你所报考大学的要求。在SAT1成绩优秀的基础上报考SAT2，会提高竞争力。

SAT2 物理题

右手螺旋定则是表示电流和电流激发磁场的磁感线方向间关系的定则，磁场是由电流产生的

而这道题时考虑带正点粒子的受力，应该用左手定则（高中）。或是大学中矢量积的方向判断的右手定则，来判断

左手定则判断：假设粒子水平向右的速度，要想顺时针，必须受向下的力，所以四指指向右，大拇指指向下，则磁感线穿过手心，所以选A 垂直纸面向外

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