# Lab - Standing Waves ```A. K. Parker
C#05435420
Phys 102 Section 50C
I.
Background
A. A lab was perfomed to make a study of standing waves in a string
II.
Equipment
A. Wave Producer, 60HZ
B. String, 2m
C. SI weight set
D. Yard Stick
III.
Proceedure
A. Linear density of the string was calculated as .6g/200cm.
B. The string was then attached at one end to the vibrator, then at the other end hung
over a pulley that was attached to the table. The distance between vibrator and top
of the pulley was 1m.
C. A holder for the weights was attached to the string hanging below the pulley. This
holder was accounted for as weighing 4.9g.
D. The vibrator was then turned on and weight added to the holder to get one full
wave across the distance of 1m.
E. Weight was then adjusted to get 2, 3, 4, and 5 fully waves across the 1m distance.
IV.
Data
Linear String Density = .6g/200cm = .003g/cm
Loops
1
2
3
4
5
Math for #4.
F= √((t/m/l)/(2L))
= 2.487/.006/1/2
= 45.52hz
Inter-Nodal
Distance (cm)
99
53.2
19.5
14
9.9
Weight(g)
119.9
29.9
17.4
9.9
4.5
V.
Questions
A.
A bounded medium, two identical waves traveling in opposite directions, energy fed
into the system at the right frequency ie resonance.
B. Yes, its where the wave propogates.
C. No, the frequency by the math in the data section shows the frequency as 45.52 hz, not
60.
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