The units for the wave number k are sec-1 m/sec m-1 radians 2) A continuous wave

Question

The units for the wave number k are
sec-1
m/sec
m-1
radians

2) A continuous wave is moving down a string. If we look at a particle that is located at a particular position (e.g., x = 0 cm), that particle will...
be moving perpendicular to the direction of the wave.
be moving parallel to the direction of the wave.
not be moving.
not be accelerating.
not be changing the sign of its acceleration.

3) You can increase the velocity of a wave along a string by...
increasing the tension in the string.
decreasing the tension in the string.
increasing the mass per unit length of the string.
decreasing the mass per unit length of the string.
(a) and (c)
(a) and (d)
(b) and (c)

4) In Example 15-5, what would have been the maximum tranverse velocity of the wave if its period had been 2.5 second but all other attributes of the wave remained the same?
1.1 m/sec
0.10 m/sec
0.08 m/sec
0.07 m/sec
0.06 m/sec

5) A single wave pulse is sent down a string with a tension ?. The far end of the string is tied to a light ring which can slide up and down a vertical rod without friction. When the wave pulse hits the end of the string attached to the ring it will
not be reflected.
be reflected with an amplitude of a greater magnitude and opposite sign.
be reflected with an amplitude of the same magnitude and opposite sign.
be reflected with an amplitdue of a greater magnitude and the same sign.
be reflected with an amplitude of the same magnitdue and the same sign.

6) The units for sound intensity levels are
decibels
watts
watts/m2
joules
m/sec

7) When a wave is incident about a boundry that separates regions of different wave speeds, the wave will be
reflected
refracted
transmitted
all of the above
none of the above

8) A wave in which the disturbance is perpendicular to the direction of travel of the wave is a...
semi-harmonic wave.
semi-periodic wave.
transverse wave.
longitudinal wave.
(a) and (c)
(b) and (d)

9) You can increase the average power delivered by a wave by increasing
its amplitude
its frequency
its wave speed
all of the above
none of the above

10) Two waves of equal amplitudes traveling in opposite directions pass through each other. After they have passed through each other, their amplitudes have
increased by a factor of 2
increased by a factor of square root of 2
not changed
decreased by a factor of square root of 2
decreased by a factor of 2

Explanation / Answer

1) m-1

2) be moving perpendicular to the direction of the wave.

3) (a) and (d)

4) Data insufficeint.

5) be reflected with an amplitude of the same magnitdue and the same sign

6)Both decibels and watt/m2.

   Commonly used is decibels

7) all of the above

8) transverse wave

9) all of the above

10) not changed

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