Question 2, you're solving for frequency so its as simple as counting the number of waves and time and plug it into the equation frequency=cycles/second.
Question 3, convert 580 khz into 580000 Hz and divide into the speed of light. The seconds will cancel out leaving you with the answer in meters which is what wavelenght is measured in so presto! you're done that question!
Question 4, convert 2.5 cm into meters. Then substitute into velocity=(frequency)(lambda) solve for frequency since you know wavelength and speed. Then convert your frequency into period by righting out frequency as cycles/second and then inverting it to seconds/cycle.
Question 5, There's a alot of parts to this one, so hang on!
a) It's as simple as multiplying the amplitude of r the wave by 2.
b) Quite simple again, solve for velocity, velocity=(frequency)(lambda), fill lambda and the wave speed and jus solve for frequency
c) Using the frequency from the last question, simply just invert the frequenc from cycles/second to seconds/cycle to get the period
d) This one is a little bit tricky, to start, you need to cross multiply to see how long it takes for the wave to 1km, to do this convert 1km into 1000m, then cross multiply and solve for seconds in the equation of 450m/1sec = 1000m/ ???sec, then using frequency from 2 questions ago, (frequency is cycles per second) multiply your answer for seconds by the frequency and you should be left with an answer with the unit of cycles.
e) And we have already solved this question in the question above.
Question 6, The wave would be slower because if you see on page 7 of the blue booklet, as the pulse hits the higer density medium of the second spring it slows down.
And that is all we did in class on this day of September the 11th, 2008 a.d.
My mother told me to pick the very best scribe and you, are, IT! Nelsa :):)
Live long and prosper everyone!!!!!! :):)
5 comments:
Very good description of the answers. Thanks for the post!
Good job with the explanations Dion. If there were like.. pictures or something to go along with them, that'd be like, the best post eeveer. But this really helped (at least.. it made total sense to me, so I assume it'd help everyone else as well).
AND WOW, I get the weekend! Whooo, party like a rockstar. Just kidds.
hahaha i admire your speech formations and representation of enthusiasm !! lol even though this isnt english class ! magnificent job, slaughtered mine by far!
oh yea and based on nelsa's comment, i assume that your explanations are very helpful even though i never read them lol! great job on being succinct!
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