If y = 0.02 sin (30x − 400t) (SI units), the frequency of the wave is...
If y = 0.02 sin (30x − 400t) (SI units),
the frequency of the wave is
30 Hz
b. 15/ Hz
c. 200/ Hz
d. 400 Hz
e. 800 Hz
the angular frequency of the wave is
a. 30 rad/s
b. 30/2 rad/s
c. 400/2 rad/s
d. 400 rad/s
e. 40/3 rad/s
the velocity of the wave is
a. 3/40 m/s
b. 40/3 m/s
c. 60/400 m/s
d. 400/60 m/s
e. 400 m/s
Homework Answers
Y = A sin (kx - wt)
a) f = w / 2 pi = 400 / 2 pi
= 200 / pi [option c]
b) w = 2 pi f
w = 400 rad/s [option d]
c) v = w / k = 400 / 30 = 40 / 3 m/s
40/3 m/s [option b]
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