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SAT Subject Test: Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
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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. Potential Energy formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
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)
PE=mgh
(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)

2. Work function F is..?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
V=IR
Etotal= E rest + KE= mc² + (Y-1)mc²
Voltage=PE/q (remember Joules/Coulomb= volt)

3. Momentum formula?
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
P=mv (?p=m?v)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
Positive - focus in front of the lens (=real image)

4. Conversion factor from atomic mass units to MeV?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
P=mv (?p=m?v)
1.6*10?¹? C
931MeV=1amu

5. Threshold frequency explanation?
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
For every action there is an equal and opposite reaction
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
1.67*10?²7kg

6. Relativistic formula for (kinetic) energy
KE= (Y-1)mc² (= (Y-1)E)
Eff= 1- Qc/Qh = 1- Tc/Th
(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)
Vfinal= V0 +at

7. magnitude of charge on electron/proton
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
1.6*10?¹? C
F=GM1M2/r²
Eff= 1- Qc/Qh = 1- Tc/Th

8. energy in a reaction q formula?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
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)

9. Planck's constant in J*s?
Product of each lens's magnification
V=f?
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
6.6310 ?³4 Js

10. Power formula?
KEmax= hf-F (= E-F= Energy of a photon - work function)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
P=IV=I²R=V² /R = Fd/t= Force*velocity
E= V/d

11. Relativistic formula for length
Length stationary=Length moving/Y
The incident angle at which total internal reflection occurs (use ?r=90°)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
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)

12. Low frequency waves have...
E0= 8.85 * 10?¹² C²/(Nm²)
Longer ? - larger diffraction - smaller shadow.
F=mv²/ r
Induced current will flow opposite direction of magnetic flux.

13. Planck's constant in electronvolts* seconds?
C= 3*108 m/s
4.14 10?¹5 eVs
Voltage=PE/q (remember Joules/Coulomb= volt)
Fnet=ma

14. Relativistic factor Y formula
W= - kq1q2 (1/r2 - 1/r1)
Y= 1/ v(1-(v/c)²)
Zero.
P=mv (?p=m?v)

15. Formula for diffraction pattern - Anti-node to node (A-N)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
(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)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

16. Sign of focus for convex lens?
Negative - focus behind the lens (= virtual image)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Zero.

17. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
E= V/d

18. Formula for energy of a photon?

19. Lenz's law
(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)
I=mr²
C= 3*108 m/s
Induced current will flow opposite direction of magnetic flux.

20. Electron capture
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
1.67*10?²7kg
Distance= velocity * time

21. (Full) Displacement formula
Induced current will flow opposite direction of magnetic flux.
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
Positive - focus in front of the lens (=real image)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

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

23. Velocity formula if time not given
Vfinal²=V0²+ 2ad
Vfinal= V0 +at
The incident angle at which total internal reflection occurs (use ?r=90°)
The volume of the object.

24. Binding energy formula
Vfinal²=V0²+ 2ad
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
Ebinding= ?m * c² (= (?m)c²)
?Tstationary= Y (?Tmoving)

25. K constant for electric field formula?
K= 9 * 10? Nm²/C²
V=f?
Zero.
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

26. Work formula
E= V/d
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage

27. Gravitational constant
G= 6.67 * 10?¹¹ Nm²/kg²
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
Large/high
Ni sin?i=nrsin?r

28. Converting Fahrenheit to Celsius
F= (9/5)C+ 32
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
A=v²/ r

29. ß? decay?
The volume of the object.
Zero.
W=qVoltage. (think C* J/C and C's cancel out)
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

30. Light intensity is proportional to..
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Intensity a Amplitude/ d²
KE=1/2mv²
K= 9 * 10? Nm²/C²

31. deBrolglie wavelength formula

32. Apparent weight (weight of submerged object)
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
W=qVoltage. (think C* J/C and C's cancel out)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Etotal= E rest + KE= mc² + (Y-1)mc²

33. Magnification equation
1/f= 1/di + 1/do
M= -di/do (=-hi/ho)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
E=hf (= Planck's constant*frequency)

34. Electric field between two plates formula?
Distance= velocity * time
E= V/d
?IE= - W (work)
Large/high

35. Magnetic force formula (for particle)?
Beat frequency= |F1-F2|
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
W= - kq1q2 (1/r2 - 1/r1)

36. Centripetal force formula
F=mv²/ r
(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)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
F=GM1M2/r²

37. Elastic potential energy for a spring formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Length stationary=Length moving/Y
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
V=IR

38. Impulse formula
F= (9/5)C+ 32
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Length stationary=Length moving/Y
P=IV=I²R=V² /R = Fd/t= Force*velocity

39. Index of refraction formula
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)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
N= C/velocity.

40. Threshold frequency formula?

41. Torque formula
For every action there is an equal and opposite reaction
P=mv (?p=m?v)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Angle of incidence=Angle of reflection

42. What is the apparent weight of a floating object?
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
P=IV=I²R=V² /R = Fd/t= Force*velocity
Zero.
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

43. Formula for how velocity changes in air? (probably don't have to know)
KE=1/2mv²
Q=m*L (where L is the latent heat of fusion or vaporization)
V= 331 m/s + (.6 m/s°C)Temperature
Zero.

44. Relativistic formula for velocity
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)
1/f= 1/di + 1/do
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
?IE= - W (work)

45. If you drop an object into water the volume displaced equals...
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
The volume of the object.
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
W=qVoltage. (think C* J/C and C's cancel out)

46. Maximum KE with which an emitted electron leaves is...?
1.67*10?²7kg
V= 331 m/s + (.6 m/s°C)Temperature
F= (9/5)C+ 32
KEmax= hf-F (= E-F= Energy of a photon - work function)

47. ß? decay?
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
W=qVoltage. (think C* J/C and C's cancel out)
KE= (Y-1)mc² (= (Y-1)E)

48. Binding energy explanation
Product of each lens's magnification
Longer ? - larger diffraction - smaller shadow.
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.)

49. Capacitance formula? (there are two)
Y= 1/ v(1-(v/c)²)
C= Q/V = e0 *A/d
Angle of incidence=Angle of reflection
(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)

50. Electric force formula? (two)
N= C/velocity.
Eff= 1- Qc/Qh = 1- Tc/Th
Felec=qE=[kq1q2]/r²
Positive - focus in front of the lens (=real image)