physics things to know

  1. resistors in series
    R1 +R2
  2. resistors in parallel
    1/R1+1/R2=1/Req
  3. I and V in series and parallel
    • V constant in parallel
    • I constant in series
  4. capcitors in parallel
    C1+C2
  5. capacitors in series
    1/C1 +1/C2=1/Ceq
  6. concave MIRROR and mirror eqn
    • image in front of mirror
    • + focal length
    • - m (inverted image)
    • + i (real image). can also be -i (virtual)
  7. convex MIRROR
    • - focal length
    • + m (upright)
    • - i (virtual)
  8. converging LENS
    • behaves like convex mirror
    • + focal length
    • + or - i (real images on opp side of the lens, + i)
  9. diverging lens
    • behaves like concave mirror
    • - focal length
    • - i
  10. myopia
    • near sightedness
    • high lens power cus it refracts light more and thus makes it intersect before retina
    • fixed with diverging lens
  11. hyperopia + presbyopia
    • far sightedness and inability to accommodate
    • weak lens power cus light not refracting enough to intersect at retina, needs larger distance
    • fixed w converging lens
  12. photoelectric effect light intensity
    intensity is like current. depends on number of photons. more photons is more intensity
  13. photoelectric effect light freq
    freq chances the energy so higher photon freq means more energy
  14. stopping voltage
    • voltage where circuit cuts cus its the max KE that an electron can escape with wout hitting the negative plate
    • depends on freq of photons
  15. photoelectric effect
    EM radiation hits a metal and it ejects electron if it hits it w energy that exceeds the metal's work function
  16. ideal fluid flow
    • fluid incompressible
    • negligble viscosity (friction)
    • flow is laminar (smooth, straight line)
    • flow rate constant
  17. isobaric process
    constant pressure
  18. isochoric
    • constant volume
    • w=o
  19. isothermal
    • constant temp
    • q=w
  20. adiabatic
    just work done no heat transfer cus system insulated
  21. moment of inertia
    • higher when mass is distributed further from radius so object moves slower
    • further away object is, greater its inertia so slower
    • I=mr^2
    • T=Ia
  22. elastic collision
    • KE conserved
    • if same mass, all vel of 1 goes to vel of other if other is stationary
  23. inelastic
    KE not conserved
  24. perfectly inelastic
    • KE not conserved
    • objects stick tgth after
  25. total internal reflection
    • when incident angle greater than critical angle. no refraction just reflect
    • light has to be enterning a medium w lower n
  26. n2 >n1
    light refracts twds the normal
Author
jhox
ID
352097
Card Set
physics things to know
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