# MCAT PHYSICS 2

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1. unit for voltage
volt (joule/coulomb) or kg-m2/A-s3
2. formula for electric potential (V) given a (q) at distance (r)
V=kq/r
3. formula for electric potential energy (U)?
U=qV
4. unit for magnetic field
• Tesla or Gauss
• 1 Tesla =104 Gauss
5. formula for force on moving charge particle in a magnetic field?
• F=qvBsin()
• B- magnetic field
6. unit of current
Ampere (1 Coulomb/sec)
7. formula for current (I)
I=q/t
8. formula for force on a current carrying wire in the presence of a magnetic field
F=iLBsin()
9. formula for magnetic field created by long straight wire
B=(permeability of free space)(current)/(2pi)(distance from wire)=uoi/2pir
10. formula for magnetic field at enter of loop or wire
B=uoi/r
11. Ohm's law
V=iR
12. formula for electric power
P=iV=i2R=V2/R
13. formula for R in series circuit
Rs=R1+R2+R3...
14. formula for R in parallel circuit
1/Rp=1/R1+1/R2+1/R3
15. formula for capacitance
C=(charge stored on the plate)Q/(potential difference btwn plates)V
16. unit for capacitance
17. formula for electric field btwn the plates of capacitor
• E=potential difference btwn plates/distance of plates
• =V/d
18. for AC current, formula for Irms, for Vrms
Irms=Imax/sqrt 2

Vrms=Vmax/sqrt 2
19. formula for Hooke's law (for springs)
F=-spring constant/displacement=-kx
20. formula for angular frequency of a mass on a spring and of a pendulum (simple harmonic motion)?
spring- f=sqrt(k/m)

pendulum- f=sqrt(g/L)
21. formula for simple harmonic motion kinetic energy and potential energy
KE=mv2/2

• Uspring=kx2/2
• Upendulum=mgh
22. for simple harmonic motion, when is kinetic energy greatest, when is potential energy the greatest?
• KE at equilibrium point
• U at max displacement
23. formula for a period of a mass on as spring and on of a pendulum
• period spring=2pi sqrt(m/k)
• period pendulum=2pi sqrt(L/g)
24. describe particle oscillation in transverse wave, in longitudinal wave
trans wave- oscillate perpendicular to wave

long wave- oscillate along the direction of wave
25. formula for velocity of wave
v=freq*wave length
26. whats a node and anti-node in a wave
• node r points that remains at rest
• anti-node r the points at max amptitude
27. formula for sound intensity
power/area
28. (t/f)higher harmonics of standing wave in open pipes have higher wave speed than lower harmonics
false, all harmonics have same wave speed
29. how are focal length and radius of curvature related?