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Exam 2 Answer Thread

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melodrama:
Post answers here. I wrote them on my formula sheet but the ladies TOOK IT AWAY. :(:(:(

melodrama:
off the top of my head, i remember:

ELECTRIC POWER
1.6 newtons up
Field = 5.0x10^-3 Tesla
EMF = 30V
Frequency = 12.5 Hz
RMS Voltage = 57 V
C (the one where the amplitude got bigger and period got smaller)
2.5 A, 11 V, 2.2 V, 6W, 5.5W, 5.5W

LIGHT
Work function = 2.0eV
EK = 0.9eV
Transition goes from n=6 to n=something... it was the 13.2 to the 10.2 level
Velocity = 2.0x10^3m/s
Neutron diffracts slightly, though lambda/w<1, it was in same order of magnitude
Laser: B (wider gap = less diffraction, so that it's more bunched up)

SOUND
Out of phase, destructive interference, intensity
Frequency = 170Hz
Next Frequency = 510Hz
Intensity = 1.0x10^-6Wm^-2
C (8:1)
B (54dB)

root:
Nice, think i got all those answers.

maxleng:

--- Quote from: "Spirited Sloth" ---off the top of my head, i remember:

ELECTRIC POWER
1.6 newtons up
Field = 5.0x10^-3 Tesla
EMF = 30V
Frequency = 12.5 Hz
RMS Voltage = 57 V
C (the one where the amplitude got bigger and period got smaller)

LIGHT
Work function = 2.0eV
EK = 0.9eV
Transition goes from n=6 to n=something... it was the 13.2 to the 10.2 level
Velocity = 2.0x10^3m/s
Laser: B (wider gap = less diffraction, so that it's more bunched up)

SOUND
Out of phase, destructive interference, intensity
Frequency = 170Hz
Next Frequency = 510Hz
Intensity = 1.0x10^6Wm^-2
C (8:1)
B (54dB)
--- End quote ---


i got 9580 ms or something for the speed  :?

FUCK i also said they wouldn't diffract but i realise now they would arghhh

maxleng:
also what did people get for the Q for increasing slit width

i chose graph C, becuase the pattern would get larger? there would be no change in spacing as its slit 'width' but people are saying it gets thinner

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