# Wave Characteristics (Grades 11-12)

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## Wave Characteristics

**Instructions:**
Read each question carefully. Choose the answer that best fits the question. If the question involves calculations, you must show all your math work.

1.

An oscillation's frequency is directly related to its wave speed and inversely related to its period.

- True
- False

2.

The trough on a transverse wave is called a(n) on a longitudinal wave. It is the part of the wave that resembles a stretched slinky.

- crest
- compression
- rarefaction
- open coil

3.

Jasmine is pushing her little brother on a swing. The swing passes back and forth 14 times in 40 seconds.

a. What is the frequency of the motion?

b. What is the period of the swing?

a. What is the frequency of the motion?

b. What is the period of the swing?

4.

A measure of how much the source deviates from equilibrium during its vibrations is the of an oscillation and indicates how much energy is involved in the vibration.

- wavelength
- frequency
- maximum oscillation
- amplitude

5.

Which of these best describes the relationship between pendulum length and pendulum period?

- the shorter the length, the greater the period
- the greater the length, the shorter the period
- the greater the length, the longer the period
- Length is independent of period.

6.

Sound waves traveling at 350m/s are made by a tuning fork that vibrates 431 times each second. What is the wavelength of the sound waves produced?

7.

Waves created by a low frequency oscillator propagate at the same speed as those emanating from a high frequency oscillator.

- True
- False

8.

At a railroad crossing, watching a train go by, you estimate the length of each railroad car to be 10m. You start to get antsy as you realize, that in 60 seconds, you've counted only 47 cars so far, and there is train as far as the eye can see.

a. What is the frequency of the train cars?

b. What is the train's speed?

a. What is the frequency of the train cars?

b. What is the train's speed?

9.

A mass suspended vertically from a spring oscillates with a frequency of 2.3Hz. The amplitude of oscillations is 10.2cm. What is total distance traveled by the mass in 5s?

10.

Wavelength depends on two quantities: the frequency of the source [math]f_s[/math], and the wave speed in the medium [math]v_w[/math]. If the source vibrates quickly, at a , then many waves will be loaded into the medium each second, and the waves will therefore be closely packed, having a .

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