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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. K constant for electric field formula?
K= 9 * 10? Nm²/C²
E0= 8.85 * 10?¹² C²/(Nm²)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

2. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
E0= 8.85 * 10?¹² C²/(Nm²)
1.67*10?²7kg
Positive - focus in front of the lens (=real image)

3. Formula for magnetic flux?
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)

4. Lenz's law
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Low
Induced current will flow opposite direction of magnetic flux.
KEmax= hf-F (= E-F= Energy of a photon - work function)

5. Momentum formula?
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
P=mv (?p=m?v)
Fb= mass of displaced fluid * gravity
The volume of the object.

6. (Full/Final) Velocity formula
Fb= mass of displaced fluid * gravity
Vfinal= V0 +at
Eff= 1- Qc/Qh = 1- Tc/Th
F=GM1M2/r²

7. Graviational force formula
F=GM1M2/r²
V=f?
Momentum is always conserved in the absence of an outside force
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)

8. Relativistic formula for time
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
?Tstationary= Y (?Tmoving)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Distance= velocity * time

9. Moment of Inertia (a.k.a. rotational mass)
Shorter ? - less diffraction - bigger shadow.
P=IV=I²R=V² /R = Fd/t= Force*velocity
Ni sin?i=nrsin?r
I=mr²

10. Distance formula?
Distance= velocity * time
PE=mgh
F=GM1M2/r²
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration

11. magnitude of charge on electron/proton
1.6*10?¹? C
Induced current will flow opposite direction of magnetic flux.
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Positive - focus in front of the lens (=real image)

12. Voltage formula (think units of volts are what?) (NOT in terms of I and R)
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)
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)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Voltage=PE/q (remember Joules/Coulomb= volt)

13. Internal energy....equals?
?IE= - W (work)
Fb= mass of displaced fluid * gravity
6.6310 ?³4 Js
Q=mc?T (where T is temperature)

14. Formula for electric field?
E= kq/r² (= f/q)
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
The incident angle at which total internal reflection occurs (use ?r=90°)
Q=mc?T (where T is temperature)

15. Low frequency waves have...
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)
F=mv²/ r
Longer ? - larger diffraction - smaller shadow.
Product of each lens's magnification

16. Magnetic force formula (for particle)?
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

17. Electric force formula? (two)
F= (9/5)C+ 32
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Large/high
Felec=qE=[kq1q2]/r²

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

19. Torque formula
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
F=mv²/ r
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

20. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
F=ILBsin? (?= angle btw. L and B)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
K= 9 * 10? Nm²/C²
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)

21. Beat frequency
Beat frequency= |F1-F2|
Etotal= E rest + KE= mc² + (Y-1)mc²
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
KE=1/2mv²

22. Newton's second law
Shorter ? - less diffraction - bigger shadow.
Fnet=ma
KE=1/2mv²
1.6*10?¹? C

23. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
Shorter ? - less diffraction - bigger shadow.
(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)
Q=m*L (where L is the latent heat of fusion or vaporization)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

24. (Full) Displacement formula
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
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)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

25. Thin lens equation
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
1/f= 1/di + 1/do
Q=mc?T (where T is temperature)
The incident angle at which total internal reflection occurs (use ?r=90°)

26. Index of refraction formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Vfinal= V0 +at
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
N= C/velocity.

27. Critical angle is...
1.6*10?¹? C
Fnet=ma
The incident angle at which total internal reflection occurs (use ?r=90°)
E= V/d

28. Capacitance formula? (there are two)
Length stationary=Length moving/Y
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
C= Q/V = e0 *A/d
W= - kq1q2 (1/r2 - 1/r1)

29. Work function F is..?
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
C= Q/V = e0 *A/d
1/f= 1/di + 1/do

30. Mass defect explanation

31. Elastic potential energy for a spring formula
The volume of the object.
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
V=IR
Positive - focus in front of the lens (=real image)

32. deBroglie wavelength explanation
Eff= 1- Qc/Qh = 1- Tc/Th
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
Voltage=PE/q (remember Joules/Coulomb= volt)
W= - kq1q2 (1/r2 - 1/r1)

33. Threshold frequency explanation?
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted
PE=mgh
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Voltage=PE/q (remember Joules/Coulomb= volt)

34. Transformer formula

35. Energy of an emitted photon formula?
Vfinal²=V0²+ 2ad
KEmax= hf-F (= E-F= Energy of a photon - work function)
Intensity a Amplitude/ d²
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

36. Relativistic formula for (kinetic) energy
Q=mc?T (where T is temperature)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
G= 6.67 * 10?¹¹ Nm²/kg²
KE= (Y-1)mc² (= (Y-1)E)

37. Centripetal force formula
A= A0 e ^ [-?t] (= activity at time t=0 e ^ ( - decay constant * time)
V=IR
F=mv²/ r
Voltage=PE/q (remember Joules/Coulomb= volt)

38. Binding energy formula
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Ebinding= ?m * c² (= (?m)c²)
Negative - focus behind the lens (= virtual image)

39. Law of reflection
Zero.
P=IV=I²R=V² /R = Fd/t= Force*velocity
Fb= mass of displaced fluid * gravity
Angle of incidence=Angle of reflection

40. Conservation of momentum
Q=m*L (where L is the latent heat of fusion or vaporization)
Zero.
Momentum is always conserved in the absence of an outside force
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)

41. Work formula
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
I=mr²

42. Efficiency of an engine formula
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
4.14 10?¹5 eVs
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)

43. High frequency wave shave...
Momentum is always conserved in the absence of an outside force
Shorter ? - less diffraction - bigger shadow.
6.6310 ?³4 Js
Fnet=ma

44. Newton's third law
V= 331 m/s + (.6 m/s°C)Temperature
For every action there is an equal and opposite reaction
Fb= mass of displaced fluid * gravity
The incident angle at which total internal reflection occurs (use ?r=90°)

45. Capacitance constant
E0= 8.85 * 10?¹² C²/(Nm²)
1/f= 1/di + 1/do
Vfinal²=V0²+ 2ad
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)

46. Binding energy explanation
Fnet=ma
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Voltage=PE/q (remember Joules/Coulomb= volt)
K= 9 * 10? Nm²/C²

47. ß? decay?
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
G= 6.67 * 10?¹¹ Nm²/kg²
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)

48. If speed is high - index of refraction is....
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
Distance= velocity * time
Low
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

49. Magnification equation
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Beat frequency= |F1-F2|
Induced current will flow opposite direction of magnetic flux.
M= -di/do (=-hi/ho)

50. Right-hand rule
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
C= 3*108 m/s