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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. High frequency wave shave...
For every action there is an equal and opposite reaction
P=mv (?p=m?v)
Shorter ? - less diffraction - bigger shadow.
KE= (Y-1)mc² (= (Y-1)E)

2. Impulse formula
?p=f?t (where f is AVERAGE force and t is how long force is applied)
931MeV=1amu
Ebinding= ?m * c² (= (?m)c²)
C= 3*108 m/s

3. OPEN PIPE FREQUENCY (Frequency/Harmonic series of a pipe opened at both ends)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
Force magnetic= |q|vBsin? (=qVperpendicularB) (?= angle between v and B)
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)

4. Gravitational constant
F=mv²/ r
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Voltage=PE/q (remember Joules/Coulomb= volt)
G= 6.67 * 10?¹¹ Nm²/kg²

5. Momentum formula?
E0= 8.85 * 10?¹² C²/(Nm²)
P=mv (?p=m?v)
W=qVoltage. (think C* J/C and C's cancel out)
?Tstationary= Y (?Tmoving)

6. Work performed by charge displacement? (hopefully...won't have to know)
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Voltage=PE/q (remember Joules/Coulomb= volt)
C= Q/V = e0 *A/d
W= - kq1q2 (1/r2 - 1/r1)

7. Maximum KE with which an emitted electron leaves is...?
KEmax= hf-F (= E-F= Energy of a photon - work function)
The volume of the object.
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

8. Critical angle is...
Beat frequency= |F1-F2|
The incident angle at which total internal reflection occurs (use ?r=90°)
Eff= 1- Qc/Qh = 1- Tc/Th
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)

9. Relativistic formula for length
Felec=qE=[kq1q2]/r²
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.
?Tstationary= Y (?Tmoving)
Length stationary=Length moving/Y

10. ß? decay?
The incident angle at which total internal reflection occurs (use ?r=90°)
Ebinding= ?m * c² (= (?m)c²)
Positive - focus in front of the lens (=real image)
Proton--> Neutron + positron (+ electron-neutrino - v) (° +1 e is produced)

11. Formula for energy of a photon?

12. If you drop an object into water the volume displaced equals...
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)
The volume of the object.
M= -di/do (=-hi/ho)

13. Kinetic Energy formula
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
R= ?L/A = (resistivity)(length of wire) / (cross sectional Area)
KE=1/2mv²
W= - kq1q2 (1/r2 - 1/r1)

14. Formula for energy levels within any atom?

15. Law of refraction
F=GM1M2/r²
Beat frequency= |F1-F2|
E0= 8.85 * 10?¹² C²/(Nm²)
Ni sin?i=nrsin?r

16. Energy of an emitted photon formula?
Angle of incidence=Angle of reflection
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
W= - kq1q2 (1/r2 - 1/r1)
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)

17. Power formula?
(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)
Negative - focus behind the lens (= virtual image)
Large/high
P=IV=I²R=V² /R = Fd/t= Force*velocity

18. Magnetic force formula (for wire)?
F=ILBsin? (?= angle btw. L and B)
Vfinal²=V0²+ 2ad
6.6310 ?³4 Js
Fnet=ma

19. Graviational force formula
F=ILBsin? (?= angle btw. L and B)
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
F=GM1M2/r²
(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)

20. Law of reflection
P=IV=I²R=V² /R = Fd/t= Force*velocity
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
Angle of incidence=Angle of reflection

21. Beat frequency
Beat frequency= |F1-F2|
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)
W=qVoltage. (think C* J/C and C's cancel out)

22. What is the photoelectric effect?
F= (9/5)C+ 32
Positive - focus in front of the lens (=real image)
Vfinal²=V0²+ 2ad
The release of electrons due to bombardment of an atom by photons (groups of quanta/bundles of matter)

23. Heat formula
Q=mc?T (where T is temperature)
I=mr²
Length stationary=Length moving/Y
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

24. Work function F is..?
Zero.
Momentum is always conserved in the absence of an outside force
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.
Minimal energy that needs to be imparted to an electron on metal surface in order to liberate it.

25. Formula for magnetic flux?
Ni sin?i=nrsin?r
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
KE=1/2mv²
Q=m*L (where L is the latent heat of fusion or vaporization)

26. Formula for electric field?
Length stationary=Length moving/Y
E= kq/r² (= f/q)
Ebinding= ?m * c² (= (?m)c²)
V=f?

27. Relativistic formula for time
?Tstationary= Y (?Tmoving)
Q=mc?T (where T is temperature)
F=ILBsin? (?= angle btw. L and B)
Fnet=ma

28. Formula for diffraction pattern - Anti-node to node (A-N)
1.67*10?²7kg
Q=mc?T (where T is temperature)
(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)
F=GM1M2/r²

29. Right-hand rule
V=IR
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
Fnet=ma
Fingers= Magnetic Field - Thumb=Velocity - Palm of hand= Force. RH=Proton - LH= electron.

30. speed of light
C= 3*108 m/s
F= n * vel./ 4L n= 1 - 3 - 5.... (L= length of pipe) (?=4L/n)
E= kq/r² (= f/q)
Product of each lens's magnification

31. Newton's first law (Law of...)
Y= 1/ v(1-(v/c)²)
M= -di/do (=-hi/ho)
Energy it takes to break a nucleus into separate protons and neutrons (same as energy lost to create atom.)
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.

32. Converting Fahrenheit to Celsius
F= (9/5)C+ 32
Vfinal²=V0²+ 2ad
Law of inertia. Object in motion stays in motion unless acted upon by an outside force.
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)

33. Relativistic formula for (kinetic) energy
V= 331 m/s + (.6 m/s°C)Temperature
Ebinding= ?m * c² (= (?m)c²)
KE= (Y-1)mc² (= (Y-1)E)
Vfinal²=V0²+ 2ad

34. Threshold frequency explanation?
G= 6.67 * 10?¹¹ Nm²/kg²
Fb= Bperp-to-areaAcos? (Measures density of magnetic field lines that cross through an area)
Felec=qE=[kq1q2]/r²
Minimum frequency that needs to illuminate a metal surface for photoELECTRONS to be emitted

35. Thin lens equation
Etotal= E rest + KE= mc² + (Y-1)mc²
1/f= 1/di + 1/do
Eff= 1- Qc/Qh = 1- Tc/Th
P=mv (?p=m?v)

36. Capacitance formula? (there are two)
P=mv (?p=m?v)
C= Q/V = e0 *A/d
EMFavg. induced= -?Fb/ ?t (= - change in mag flux/change in time)
F=GM1M2/r²

37. Work formula
W=(Force parallel)(distance)= Pressure ? V (change in volume)= qvoltage
4.14 10?¹5 eVs
Shorter ? - less diffraction - bigger shadow.
KE=1/2mv²

38. Formula for electric potential energy?
PE= 1/2 C (?V)² = 1/2 Q²/C = 1/2 Q?V
E= V/d
Q= [(mass of A + mass of B) - (mass of C + mass of D)] c² (where A+B-->C+D)
Vfinal= V0 +at

39. Velocity formula if time not given
Energy of emitted photon = E2-E1 (=Energy level higher- Energy level lower)
Vfinal²=V0²+ 2ad
1/f= 1/di + 1/do
Eff= 1- Qc/Qh = 1- Tc/Th

40. Potential Energy formula
E0= 8.85 * 10?¹² C²/(Nm²)
PE=mgh
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
F=ILBsin? (?= angle btw. L and B)

41. Planck's constant in electronvolts* seconds?
Shorter ? - less diffraction - bigger shadow.
4.14 10?¹5 eVs
N= C/velocity.
Distance= velocity * time

42. deBroglie wavelength explanation
E0= 8.85 * 10?¹² C²/(Nm²)
Particles in motion can display wave characteristics - and behave as if they had wavelength (?= h/p)
P=IV=I²R=V² /R = Fd/t= Force*velocity
PE=mgh

43. K constant for electric field formula?
K= 9 * 10? Nm²/C²
En= [Z²/n² * -13.6ev ] (Z is number of protons in atom's nucleus - n is energy level number)
?V2/?V1= N2/N1 (if secondary greater than primary it's a step-up transformer).
W=qVoltage. (think C* J/C and C's cancel out)

44. Transformer formula

45. Mass defect explanation

46. ß? decay?
PEspring= 1/2 kx² (K is spring constant - X is distance spring compressed)
V=f?
Neutron --> Proton + electron ( + electron-antineutrino - V with line over it) ( °?1e produced)
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)

47. Ideal gas law
?=h/p (where p= MOMENTUM=m?v - and h is planck's constant)
The volume of the object.
F= n * vel/2L n= 1 - 2 - 3... (L= length of pipe) (?=2L/n)
PV=nRT (p= pressure - V= volume - n= number of moles - T= temperature in KELVIN - R= .0821)

48. (Full) Displacement formula
Atom + electron--> Neutron (the addition of an electron - °?1e - causes a proton to change into a neutron - i.e. PROTON TRANSFORMS)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
?p=f?t (where f is AVERAGE force and t is how long force is applied)
Felec=qE=[kq1q2]/r²

49. Sign of focus for concave lens?
Positive - focus in front of the lens (=real image)
KEmax= hf-F (= E-F= Energy of a photon - work function)
S= 1/2at² + v0t+ d0 (intial distance is often ignored because we decide where we want to start)
F=ILBsin? (?= angle btw. L and B)

50. Electric field between two plates formula?
?= 4L + 1.6d
E= V/d
W=qVoltage. (think C* J/C and C's cancel out)
P=IV=I²R=V² /R = Fd/t= Force*velocity