Grade 11 Physics Take-Home Wave Test
1 Hour Supervised
No Phones or Computers
Not Open Book
Parent Signature__________________________
PART A: Multiple Choice
1. A tuning fork oscillates with a frequency of 256 hertz after
being struck by a rubber hammer. Which phrase best
describes the sound waves produced by this oscillating
tuning fork?
(A) electromagnetic waves that require no
medium for transmission
(B) electromagnetic waves that require a medium
for transmission
(C) mechanical waves that require no medium
for transmission
(D) mechanical waves that require a medium for
transmission
2. In a vacuum, all electromagnetic waves have the same
(A) wavelength (B) speed (C) frequency
(D) amplitude
3. A sound of constant frequency is produced by the siren on
top of a firehouse. Compared to the frequency produced by
the siren, the frequency observed by a firefighter
approaching the firehouse is
(A) lower (B) higher (C) the same
4. A standing wave pattern is produced when a guitar string is
plucked. Which characteristic of the standing wave
immediately begins to decrease?
(A) speed (B) frequency (C) wavelength
(D) amplitude
5. The hertz is a unit that describes the number of
(A) seconds it takes to complete one cycle of a
wave
(B) cycles of a wave completed in one second
(C) points that are in phase along one meter of a
wave
(D) points that are out of phase along one meter
of a wave
11.
PART B: LONG ANSWER
1. An ambulance approaches you at 145 km/h. You perceive the frequency of the siren to be 564 Hz. What
would the perceived frequency of the ambulance be after passing you if it is 25.0° C?
𝑣±𝑣𝑜
𝑓′ = (
𝑣∓𝑣𝑠
)𝑓
331𝑚/𝑠√1 +
𝑇℃
273℃
2. Complete the following diagram of a ray of light moving through a diamond in water.
PART C: SHORT ANSWER
1. The speed of a wave on a string instrument such as a guitar may be 350 m/s. If the frequency of the
standing wave is 420 Hz, how far apart are the nodes?
2. The distance between the second and fifth nodes in a standing wave is 60 cm. (a) What is the
wavelength of the waves? (b) What is the speed of the waves, if the source has a frequency of 25 Hz?
3. Standing waves are set up in a string by a source vibrating at 100 Hz. Seven nodes are counted in a
distance of 63 cm. (a) What is the wavelength of the waves traveling in the string? (b) What is the speed
of the waves?
BONUS: Two point sources are generating waves in a ripple tank causing the waves to interfere. The two point
sources are 10.0 cm apart, and the frequency of the waves is 4.0 Hz. A point on the first nodal line is located
16.0 cm away from one source and 15.0 cm away from the other. (a)What is the wavelength of the waves?
(b) What is the speed of the waves?
PART D: MATCHING
Indicate which wave characteristic the following statements refer to by placing a letter in each blank.
F = frequency
______(1) May be expressed in units of HZ.
λ= wavelength
______(2) Number of waves passing by a given point per unit time.
A = Amplitude
______(3) Equals F x λ
T=Period
______(4) Equals F x λ
V =Velocity
______(5) Equals F x λ
______(6) Indicator of the amount of energy in a longitudinal wave.
______(7) Independent upon the medium through which a wave is traveling.
______(8) Horizontal distance between adjacent troughs.
______(9) Maximum displacement from the rest position.