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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. Internal energy....equals?
C= 3*108 m/s
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
?IE= - W (work)
For every action there is an equal and opposite reaction

2. magnitude of charge on electron/proton
1/f= 1/di + 1/do
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
1.6*10?¹? C

3. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
Etotal= E rest + KE= mc² + (Y-1)mc²
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)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
1/f= 1/di + 1/do

4. Planck's constant in J*s?
6.6310 ?³4 Js
Positive - focus in front of the lens (=real image)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
P=IV=I²R=V² /R = Fd/t= Force*velocity

5. If speed is high - index of refraction is....
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Q=m*L (where L is the latent heat of fusion or vaporization)
Low

6. Binding energy formula
1.6*10?¹? C
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
Ebinding= ?m * c² (= (?m)c²)
1/f= 1/di + 1/do

7. Magnetic force formula (for particle)?
Vfinal²=V0²+ 2ad
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

8. Work performed by charge displacement? (hopefully...won't have to know)
P=mv (?p=m?v)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
W= - kq1q2 (1/r2 - 1/r1)
Eff= 1- Qc/Qh = 1- Tc/Th

9. Energy of an emitted photon formula?
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
F=mv²/ r
N= C/velocity.
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

10. If speed is slow/low - index of refraction is...
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)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Large/high
Angle of incidence=Angle of reflection

11. Graviational force formula
Momentum is always conserved in the absence of an outside force
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
W=qVoltage. (think C* J/C and C's cancel out)
F=GM1M2/r²

12. Lenz's law
V=f?
Induced current will flow opposite direction of magnetic flux.
1/f= 1/di + 1/do
Fnet=ma

13. Centripetal acceleration formula
I=mr²
1.67*10?²7kg
931MeV=1amu
A=v²/ r

14. Moment of Inertia (a.k.a. rotational mass)
I=mr²
Angle of incidence=Angle of reflection
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
The volume of the object.

15. Impulse formula
Product of each lens's magnification
For every action there is an equal and opposite reaction
Ni sin?i=nrsin?r
?p=f?t (where f is AVERAGE force and t is how long force is applied)

16. Sign of focus for convex lens?
Negative - focus behind the lens (= virtual image)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Q=mc?T (where T is temperature)
P=mv (?p=m?v)

17. If you drop an object into water the volume displaced equals...
K= 9 * 10? Nm²/C²
C= Q/V = e0 *A/d
Y= 1/ v(1-(v/c)²)
The volume of the object.

18. Efficiency of an engine formula
P=mv (?p=m?v)
Momentum is always conserved in the absence of an outside force
Large/high
Eff= 1- Qc/Qh = 1- Tc/Th

19. Maximum KE with which an emitted electron leaves is...?
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
?Tstationary= Y (?Tmoving)
1.6*10?¹? C
KEmax= hf-F (= E-F= Energy of a photon - work function)

20. Right-hand rule
(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)
Intensity a Amplitude/ d²
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Ebinding= ?m * c² (= (?m)c²)

21. Voltage formula (for circuit - etc.)
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)
V=IR
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)

22. Capacitance constant
Negative - focus behind the lens (= virtual image)
4.14 10?¹5 eVs
Q=mc?T (where T is temperature)
E0= 8.85 * 10?¹² C²/(Nm²)

23. Relativistic factor Y formula
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)
4.14 10?¹5 eVs
W= - kq1q2 (1/r2 - 1/r1)
Y= 1/ v(1-(v/c)²)

24. Heat formula
F=mv²/ r
Vfinal= V0 +at
KE= (Y-1)mc² (= (Y-1)E)
Q=mc?T (where T is temperature)

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

26. Capacitance formula? (there are two)
V=IR
Threshold frequency=F/h (= work functions/planck's constant)
C= Q/V = e0 *A/d
I=mr²

27. Heat of fusion/vaporization fromula
Low
Voltage=PE/q (remember Joules/Coulomb= volt)
Q=m*L (where L is the latent heat of fusion or vaporization)
Felec=qE=[kq1q2]/r²

28. K constant for electric field formula?
E0= 8.85 * 10?¹² C²/(Nm²)
4.14 10?¹5 eVs
Negative - focus behind the lens (= virtual image)
K= 9 * 10? Nm²/C²

29. Conversion factor from atomic mass units to MeV?
931MeV=1amu
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
V=IR
Vfinal²=V0²+ 2ad

30. Formula for energy levels within any atom?

31. Work function F is..?
Zero.
?Tstationary= Y (?Tmoving)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

32. Formula for resistance of an OBJECT
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Low

33. ß? decay?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Beat frequency= |F1-F2|
Momentum is always conserved in the absence of an outside force
V= 331 m/s + (.6 m/s°C)Temperature

34. Law of refraction
Ni sin?i=nrsin?r
?= 4L + 1.6d
F=ILBsin? (?= angle btw. L and B)
The volume of the object.

35. Electric field between two plates formula?
Ni sin?i=nrsin?r
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
E= V/d
Angle of incidence=Angle of reflection

36. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
For every action there is an equal and opposite reaction
KE= (Y-1)mc² (= (Y-1)E)
Voltage=PE/q (remember Joules/Coulomb= volt)

37. Formula for how velocity changes in air? (probably don't have to know)
931MeV=1amu
1.67*10?²7kg
V= 331 m/s + (.6 m/s°C)Temperature
Distance= velocity * time

38. Critical angle is...
KE= (Y-1)mc² (= (Y-1)E)
The volume of the object.
For every action there is an equal and opposite reaction
The incident angle at which total internal reflection occurs (use ?r=90°)

39. Correction factor for wavelength in a diffraction experiment (probably don't have to know)
?= 4L + 1.6d
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

40. Total KE formula
Longer ? - larger diffraction - smaller shadow.
Etotal= E rest + KE= mc² + (Y-1)mc²
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
1/f= 1/di + 1/do

41. Mass defect explanation

42. Gravitational constant
K= 9 * 10? Nm²/C²
G= 6.67 * 10?¹¹ Nm²/kg²
KEmax= hf-F (= E-F= Energy of a photon - work function)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)

43. Magnetic force formula (for wire)?
V= 331 m/s + (.6 m/s°C)Temperature
F=ILBsin? (?= angle btw. L and B)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

44. Formula for energy of a photon?

45. Power formula?
P=IV=I²R=V² /R = Fd/t= Force*velocity
W=qVoltage. (think C* J/C and C's cancel out)
931MeV=1amu
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

46. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
Eff= 1- Qc/Qh = 1- Tc/Th
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Distance= velocity * time
1.67*10?²7kg

47. Apparent weight (weight of submerged object)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
G= 6.67 * 10?¹¹ Nm²/kg²
KEmax= hf-F (= E-F= Energy of a photon - work function)

48. Torque formula
F= (9/5)C+ 32
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
?= 4L + 1.6d
C= Q/V = e0 *A/d

49. Converting Fahrenheit to Celsius
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
F= (9/5)C+ 32
Shorter ? - less diffraction - bigger shadow.

50. Ideal gas law
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
1.67*10?²7kg
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted