A drainage pipe running under a freeway is 30.0 m long. Both ends of the pipe are open, and wind blowing across one end causes t
1 answer:
Answer:
The fundamental frequency of air vibration in this pipe 5.41 kHz.
Explanation:
Given that,
A drainage pipe running under a freeway is 30.0 m long, l = 30 m
The speed of sound is, v = 340 m/s
We need to find the fundamental frequency of the canal. For a tube open at both the ends, the fundamental frequency is given by :
So, the fundamental frequency of air vibration in this pipe 5.41 kHz.
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,
where
is the current;
is the drift speed;
is the cross-section area of the wire,
is the number of charge carrier per unit volume, and
is the charge on each charge carrier.
Area of a circular cross-section:
,
where
is the radius of the wire.
and
are the same for all four samples, for they are made out of the same material.
As a result, of each wire is directly proportional to
where the value of
is constant.
For each of the four wires:
.
How do the four wires rank by their current?
d > a > b > c.