A stretched string has a fundamental frequency of 165 Hz. Someone nearby sings a note at a frequency of 495 Hz. As a result, the string:

1
A stretched string has a fundamental frequency of
165 Hz. Someone nearby sings a note at a
frequency of 495 Hz. As a result, the string

1. Will begin to vibrate
2. Will not vibrate at all
3. Might vibratedepends on the song

2
The sources A and B are identical, emitting waves
with wavelngth ?. Waves from each source travel
along the path shown. What distance smallest X
is necessary for the waves to be completely out
of phase at the Line shown?
A
D
B
X
X

1. X D
2. X D/2
3. X ?/4
4. X ?
5. X ?/2

3
The two sources A and B are identical, emitting
waves of wavelength ?. They are separated by a
distance D1.5?, equally spaced from the origin
along the y-axis. What type of interference
occurs at point P1?

1. Fully destructive
2. Mostly destructive
3. Fully constructive
4. Depends on the distance of P1 from the origin

4
The two sources A and B are identical, emitting
waves of wavelength ?. They are separated by a
distance D1.5?, equally spaced from the origin
along the y-axis. What type of interference
occurs at point P2?

1. Fully destructive
2. Mostly destructive
3. Fully constructive
4. Depends on the distance of P2 from the origin

5
Are there any other points besides P1 where the
interference is fully constructive, and if so,
how many such points (including P1) are there?

1. No other points
2. There are 2 total
3. There are 4 total
4. There are 6 total