- #1
ultra_mc
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I just tried to post this topic but the site logged me out when I tried to post it. Now I have to do it all over again fun!
This is page 1: http://s890.photobucket.com/albums/ac101/ultra_mc/?action=view¤t=Image.jpg
So question 1:
f = ?
x = 5.5m
Δx = 2m
v= 340m/s
d = 4.5m
v = fλ
PnS1 - PnS2 = (n - 1/2)λ
Made a triangle to find PnS1:
5.5^2 + 4.5^2 = c^2
c = 7.11
PnS1 = 7.11m
PnS1 - PnS2 = (n - 1/2)λ
7.11 - 5.5 = (1 - 1/2)λ
1.61
---- = λ
0.5
λ = 3.22
v = fλ
340 = f(3.22)
340
--- = f
3.22
f = 105.59Hz
Which is not one of the answers...
What did I do wrong?
This is page 1: http://s890.photobucket.com/albums/ac101/ultra_mc/?action=view¤t=Image.jpg
So question 1:
Homework Statement
f = ?
x = 5.5m
Δx = 2m
v= 340m/s
d = 4.5m
Homework Equations
v = fλ
PnS1 - PnS2 = (n - 1/2)λ
The Attempt at a Solution
Made a triangle to find PnS1:
5.5^2 + 4.5^2 = c^2
c = 7.11
PnS1 = 7.11m
PnS1 - PnS2 = (n - 1/2)λ
7.11 - 5.5 = (1 - 1/2)λ
1.61
---- = λ
0.5
λ = 3.22
v = fλ
340 = f(3.22)
340
--- = f
3.22
f = 105.59Hz
Which is not one of the answers...
What did I do wrong?