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# Physics - waves and timebase watch

1. I'm so stuck on this question in one of my past papers... It's multiple choice and i don't get to any of the options!
Here's my workings:
Time for one cycle is T=Lx where L is the distance corresponding to one cycle and x is the timebase setting
So; T=2.25 x 2
= 4.5
and, f=1/T so, f=1/0.0045 = 222.2222..............
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2. (Original post by Jmun)
I'm so stuck on this question in one of my past papers... It's multiple choice and i don't get to any of the options!
Here's my workings:
Time for one cycle is T=Lx where L is the distance corresponding to one cycle and x is the timebase setting
So; T=2.25 x 2
= 4.5
and, f=1/T so, f=1/0.0045 = 222.2222..............
I think you need to look at your L again. I make it 1.25
3. lol! oh gosh...i was obviously thinking of x as well... so sorry to waste your time! Thanks a lot

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