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Physics: Post your doubts here!

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The time period of the stationary wave is 20ms. After 5 ms, it would be a straight horizontal line, drawn on the dotted line. Take a look at this animation and you will understand the logic

Standing_wave_2.gif
 
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The time period of the stationary wave is 20ms. After 5 ms, it would be a straight horizontal line, drawn on the dotted line. Take a look at this animation and you will understand the logic

Standing_wave_2.gif
Can you elaborate a bit more.....I mean, won't the wave travel a further more after 5 sec...and for the wave given isn't the time period 30m/s....a bit confused here....:unsure:
 
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frequence = 50 hz Thus 1/50 = 20ms = time period.
After 5ms, the wave would have travelled through 1/4th of its total distance. Thus after travelling 1/4th of its distance from its highest displacement, the antinodes too will have zero displacement at this time. You can also imagine the wave's path in your head or on the animation. From the top to the bottom, the wave has travelled half of its path. Half of half = 1/4 which would be when the displacement of all the points on it is zero
 
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That Percentage is The uncertainity in R.. So its 1.9% of R value.
Which is 0.0489.
Now You will have to :

1.9/100 * 0.048 = 9*10^-3 = 0.009 cm :p :3
% uncertainty = (uncertainty/reading) * 100
1.9% = (uncertainty/0.4886) * 100
0.019 = uncertainty/0.4886
uncertainty = 0.019 * 0.4886
[ uncertainty ≈ ± 0.009 cm ]
:)
Thankyou guys :') I figured it out too :p
But thanks alot :love::LOL:
 
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Ok so A simple question..
Why would Power be zero when resistance would be O or also infinity?
Why would power be zero in both the cases? :/
 
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