SAT Subject Test: Physics Formulas

Instructions:

• Answer 50 questions in 15 minutes.
• If you are not ready to take this test, you can study here.
• Match each statement with the correct term.
• Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Formula for electric field?
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
E= kq/r² (= f/q)
The volume of the object.
Q=m*L (where L is the latent heat of fusion or vaporization)


2. Electric field between two plates formula?
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
For every action there is an equal and opposite reaction
E= V/d
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)


3. Voltage formula (for circuit - etc.)
V=IR
1.67*10?²7kg
The volume of the object.
V=f?


4. Formula for diffraction pattern - Anti-node to node (A-N)
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.


5. Relativistic formula for (kinetic) energy
Induced current will flow opposite direction of magnetic flux.
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
Positive - focus in front of the lens (=real image)
KE= (Y-1)mc² (= (Y-1)E)


6. Relativistic formula for velocity
Etotal= E rest + KE= mc² + (Y-1)mc²
Vstationary obj.= [u+v] / [1 + uv/c²] (where u is velocity of large object - and v is velocity of "thrown" object relative to large object)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
F=ILBsin? (?= angle btw. L and B)


7. If you drop an object into water the volume displaced equals...
Longer ? - larger diffraction - smaller shadow.
The volume of the object.
F=ILBsin? (?= angle btw. L and B)
C= 3*108 m/s


8. Apparent weight (weight of submerged object)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Length stationary=Length moving/Y
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
K= 9 * 10? Nm²/C²


9. Electric force formula? (two)
Etotal= E rest + KE= mc² + (Y-1)mc²
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Felec=qE=[kq1q2]/r²
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)


10. Planck's constant in electronvolts* seconds?
4.14 10?¹5 eVs
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
The volume of the object.


11. Activity of a radioactive sample formula? (probably don't have to know)
Voltage=PE/q (remember Joules/Coulomb= volt)
G= 6.67 * 10?¹¹ Nm²/kg²
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)


12. Centripetal acceleration formula
P=mv (?p=m?v)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
A=v²/ r


13. Work (only in terms of charge and voltage) formula

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14. (Full/Final) Velocity formula
1.67*10?²7kg
For every action there is an equal and opposite reaction
Vfinal= V0 +at
1/f= 1/di + 1/do


15. Critical angle is...
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Difference between mass of nucleus and sum of it's constituent nucleons (protons/neutrons ...WHY?) energy lost when atom created. (That energy lost is the same energy it takes to break a nucleus into separate protons and neutrons)
W= - kq1q2 (1/r2 - 1/r1)
The incident angle at which total internal reflection occurs (use ?r=90°)


16. Capacitance constant
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
E0= 8.85 * 10?¹² C²/(Nm²)
V=f?
C= Q/V = e0 *A/d


17. Heat of fusion/vaporization fromula
Q=m*L (where L is the latent heat of fusion or vaporization)
F=mv²/ r
E=hf (= Planck's constant*frequency)
Fnet=ma


18. Maximum KE with which an emitted electron leaves is...?
Shorter ? - less diffraction - bigger shadow.
KEmax= hf-F (= E-F= Energy of a photon - work function)
Voltage=PE/q (remember Joules/Coulomb= volt)
V= 331 m/s + (.6 m/s°C)Temperature


19. Heat formula
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Q=mc?T (where T is temperature)
Shorter ? - less diffraction - bigger shadow.
For every action there is an equal and opposite reaction


20. What is the apparent weight of a floating object?
KEmax= hf-F (= E-F= Energy of a photon - work function)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Zero.
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)


21. Faraday's law
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Etotal= E rest + KE= mc² + (Y-1)mc²
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)


22. Lenz's law
Induced current will flow opposite direction of magnetic flux.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
KEmax= hf-F (= E-F= Energy of a photon - work function)


23. Low frequency waves have...
W= - kq1q2 (1/r2 - 1/r1)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
931MeV=1amu
Longer ? - larger diffraction - smaller shadow.


24. Formula for velocity of waves?
Positive - focus in front of the lens (=real image)
Zero.
V=f?
E=hf (= Planck's constant*frequency)


25. Energy of an emitted photon formula?
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)


26. Relativistic formula for length
?= 4L + 1.6d
6.6310 ?³4 Js
Large/high
Length stationary=Length moving/Y


27. New/old gas formula?

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28. Threshold frequency explanation?
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
C= 3*108 m/s


29. (Full) Displacement formula
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
KE= (Y-1)mc² (= (Y-1)E)


30. Formula for energy of a photon?

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31. ß? decay?
V=f?
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
C= Q/V = e0 *A/d


32. energy in a reaction q formula?
931MeV=1amu
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
W= - kq1q2 (1/r2 - 1/r1)


33. Work formula
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
N?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Etotal= E rest + KE= mc² + (Y-1)mc²


34. Internal energy....equals?
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
?IE= - W (work)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Distance= velocity * time


35. Mass defect explanation

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36. deBrolglie wavelength formula

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37. Torque formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Induced current will flow opposite direction of magnetic flux.
KEmax= hf-F (= E-F= Energy of a photon - work function)
Positive - focus in front of the lens (=real image)


38. Relativistic factor Y formula
1/f= 1/di + 1/do
Q=m*L (where L is the latent heat of fusion or vaporization)
V=f?
Y= 1/ v(1-(v/c)²)


39. Law of reflection
C= 3*108 m/s
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Angle of incidence=Angle of reflection
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)


40. Centripetal force formula
F= (9/5)C+ 32
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
F=mv²/ r
C= 3*108 m/s


41. Electron capture
Distance= velocity * time
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
1.6*10?¹? C
(n-1/2)?/ d= x/L (where x =distance between c and the anti-node - L =distance from screen to source - n=number anti-node - and d = distance between the slits)


42. Newton's first law (Law of...)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
E= V/d
?Tstationary= Y (?Tmoving)
Shorter ? - less diffraction - bigger shadow.


43. Moment of Inertia (a.k.a. rotational mass)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
6.6310 ?³4 Js
V=IR
I=mr²


44. Thin lens equation
1/f= 1/di + 1/do
Length stationary=Length moving/Y
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Y= 1/ v(1-(v/c)²)


45. Transformer formula

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46. Impulse formula
Momentum is always conserved in the absence of an outside force
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Threshold frequency=F/h (= work functions/planck's constant)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)


47. Formula for energy levels within any atom?

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48. Kinetic Energy formula
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
W= - kq1q2 (1/r2 - 1/r1)
Shorter ? - less diffraction - bigger shadow.
KE=1/2mv²


49. Relativistic formula for time
?Tstationary= Y (?Tmoving)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Etotal= E rest + KE= mc² + (Y-1)mc²


50. Buoyant force formula
M= -di/do (=-hi/ho)
Negative - focus behind the lens (= virtual image)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Fb= mass of displaced fluid * gravity