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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. Centripetal acceleration formula
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Longer ? - larger diffraction - smaller shadow.
A=v²/ r
KEmax= hf-F (= E-F= Energy of a photon - work function)

2. Voltage formula (for circuit - etc.)
V= 331 m/s + (.6 m/s°C)Temperature
F= (9/5)C+ 32
V=IR
Momentum is always conserved in the absence of an outside force

3. Efficiency of an engine formula
Eff= 1- Qc/Qh = 1- Tc/Th
Zero.
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

4. Law of reflection
Beat frequency= |F1-F2|
KE= (Y-1)mc² (= (Y-1)E)
Y= 1/ v(1-(v/c)²)
Angle of incidence=Angle of reflection

5. High frequency wave shave...
K= 9 * 10? Nm²/C²
Shorter ? - less diffraction - bigger shadow.
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.

6. If you drop an object into water the volume displaced equals...
G= 6.67 * 10?¹¹ Nm²/kg²
Apparent weight = Fb- weight= (mfg) - (m0g) = (mass of displaced fluid gravity) - (initial mass of object while hanging in air gravity) = (DfVfg)- (DoVog)
The volume of the object.
KE= (Y-1)mc² (= (Y-1)E)

7. Maximum KE with which an emitted electron leaves is...?
G= 6.67 * 10?¹¹ Nm²/kg²
Longer ? - larger diffraction - smaller shadow.
M= -di/do (=-hi/ho)
KEmax= hf-F (= E-F= Energy of a photon - work function)

8. ß? decay?
F=GM1M2/r²
For every action there is an equal and opposite reaction
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Beat frequency= |F1-F2|

9. Newton's third law
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
1/f= 1/di + 1/do
Distance= velocity * time
For every action there is an equal and opposite reaction

10. deBroglie wavelength explanation
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
E0= 8.85 * 10?¹² C²/(Nm²)
V=f?
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)

11. ONE END CAPPED PIPE FREQUENCY (Frequency/Harmonic series of a pipe closed at one ned)
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
I=mr²

12. Formula for energy levels within any atom?

13. Conversion factor from atomic mass units to MeV?
931MeV=1amu
M= -di/do (=-hi/ho)
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)
Intensity a Amplitude/ d²

14. Work formula
C= 3*108 m/s
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
Product of each lens's magnification
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)

15. Elastic potential energy for a spring formula
Induced current will flow opposite direction of magnetic flux.
?IE= - W (work)
W= - kq1q2 (1/r2 - 1/r1)
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)

16. Heat of fusion/vaporization fromula
Q=m*L (where L is the latent heat of fusion or vaporization)
C= Q/V = e0 *A/d
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
F=mv²/ r

17. Law of refraction
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
F=GM1M2/r²
Ni sin?i=nrsin?r
For every action there is an equal and opposite reaction

18. Formula for electric field?
P=IV=I²R=V² /R = Fd/t= Force*velocity
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
E= kq/r² (= f/q)

19. Total KE formula
Etotal= E rest + KE= mc² + (Y-1)mc²
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
W=qVoltage. (think C* J/C and C's cancel out)
Low

20. Work function F is..?
F= (9/5)C+ 32
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

21. Planck's constant in electronvolts* seconds?
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
4.14 10?¹5 eVs
Eff= 1- Qc/Qh = 1- Tc/Th
6.6310 ?³4 Js

22. magnitude of charge on electron/proton
?= 4L + 1.6d
I=mr²
1.6*10?¹? C
Felec=qE=[kq1q2]/r²

23. mass of a proton/neutron (there's a slight difference but ignore it - neutron has slightly more mass)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
V=IR
1.67*10?²7kg
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)

24. Mass defect explanation

25. Formula for diffraction pattern - Anti-node to Anti-node (A-A)
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)
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)
P=mv (?p=m?v)
Shorter ? - less diffraction - bigger shadow.

26. Transformer formula

27. speed of light
C= 3*108 m/s
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Felec=qE=[kq1q2]/r²
Y= 1/ v(1-(v/c)²)

28. K constant for electric field formula?
K= 9 * 10? Nm²/C²
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
PV/nT'= p'V'n'T' (p=pressure - V= VOLUME - T= temperature)
1.6*10?¹? C

29. Relativistic formula for velocity
C= Q/V = e0 *A/d
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)
C= 3*108 m/s
Positive - focus in front of the lens (=real image)

30. Thin lens equation
1/f= 1/di + 1/do
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
Large/high

31. What is the photoelectric effect?
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)
E0= 8.85 * 10?¹² C²/(Nm²)
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Threshold frequency=F/h (= work functions/planck's constant)

32. deBrolglie wavelength formula

33. Formula for energy of a photon?

34. (Full) Displacement formula
KE= (Y-1)mc² (= (Y-1)E)
M= -di/do (=-hi/ho)
V=IR
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

35. (Full/Final) Velocity formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Vfinal= V0 +at
E= kq/r² (= f/q)
Positive - focus in front of the lens (=real image)

36. Magnetic force formula (for wire)?
KE=1/2mv²
W= - kq1q2 (1/r2 - 1/r1)
Ni sin?i=nrsin?r
F=ILBsin? (?= angle btw. L and B)

37. Distance formula?
Distance= velocity * time
Y= 1/ v(1-(v/c)²)
Threshold frequency=F/h (= work functions/planck's constant)
M= -di/do (=-hi/ho)

38. Torque formula
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)
Torque=force perpendicular to radius r = fr Toruqe=Ia = inertia * angular acceleration
Product of each lens's magnification
Vfinal²=V0²+ 2ad

39. What is the apparent weight of a floating object?
Zero.
Beat frequency= |F1-F2|
A=v²/ r
F=GM1M2/r²

40. Momentum formula?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
V= 331 m/s + (.6 m/s°C)Temperature
K= 9 * 10? Nm²/C²
P=mv (?p=m?v)

41. Newton's second law
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Fnet=ma
Low
W= - kq1q2 (1/r2 - 1/r1)

42. Relativistic formula for length
Distance= velocity * time
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)
Vfinal²=V0²+ 2ad
Length stationary=Length moving/Y

43. Kinetic Energy formula
Angle of incidence=Angle of reflection
KE=1/2mv²
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)

44. Threshold frequency explanation?
Positive - focus in front of the lens (=real image)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
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)

45. Binding energy explanation
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)
P=mv (?p=m?v)
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

46. How to find total magnification?

47. Ideal gas law
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
G= 6.67 * 10?¹¹ Nm²/kg²
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

48. Faraday's law
Y= 1/ v(1-(v/c)²)
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
M= -di/do (=-hi/ho)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)

49. Formula for velocity of waves?
F=mv²/ r
E0= 8.85 * 10?¹² C²/(Nm²)
KEmax= hf-F (= E-F= Energy of a photon - work function)
V=f?

50. Relativistic formula for (kinetic) energy
KE= (Y-1)mc² (= (Y-1)E)
The volume of the object.
?p=f?t (where f is AVERAGE force and t is how long force is applied)
K= 9 * 10? Nm²/C²