Lecture 10) choose the correct answer

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A transverse wave moves along a string with a constant speed of 5 m/s.. The acceleration of a point on the string ...
a) varies over time according to a mathematical sine function
b) is 5 m/s
c) is zero
d) changes sinusoidally with time in the direction parallel to the length of the string
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Terms in this set (10)
A transverse wave moves along a string with a constant speed of 5 m/s.. The acceleration of a point on the string ...
a) varies over time according to a mathematical sine function
b) is 5 m/s
c) is zero
d) changes sinusoidally with time in the direction parallel to the length of the string
is zero
A transverse wave travels on a string according to the expression y = 0.10 sin(5𝝿x + 5𝝿t), where x and y are measured in meters and t - in seconds. The frequency of this wave is ...
a) 10 Hz
b) 5 Hz
c) 2.5 Hz
d) 1 Hz
2.5 Hz
Suppose you are approaching with a velocity of 30 m/s a warning device that produces a sound of 300 Hz frequency. The frequency you will perceive will be ...
a) 300 Hz
b) 326 Hz
c) 330 Hz
d) 270 Hz
330 Hz
The period of a wave is measured in
a) Hz
b) s
c) m
d) m / s
Hz
The stiffness constant is measured in
a) Nm
b) N/m²
c) N/m
d) N
Nm
Cutting down the distance to the light source by half increases the light intensity by a factor of ...
a) 2
b) 4
c) 8
d) 6
e
The light intensity is measured in ...
a) Cd
b) Lm
c) Lx
d) W/m²
Cd
How far away can a 100 W - police siren be heard ? Assume the minimum detectable intensity is 10.0 x 10⁻⁶ W/m².
a) 8.9 x 10³ m
b) 890 m
c) 890 km
890 m
The wavelength lambda satisfying the standing wave condition in a string of length L is: ...
a) lambda=2L/n
b) lambda=2f/n
c) lambda=2n/L
lambda=2L/n.
Suppose two identical harmonic waves of amplitude A interfere (no phase shift). Which statement is NOT correct for the net result?
a) no wave
b) a harmonic wave with an amplitude of 2A
c) a harmonic wave with an amplitude of 4A
no wave