# A 80cm string is stretched between two points. The ```A 80cm string is stretched between two points. The
velocity of a wave o the string is 200m/s. Draw and find the
frequency and wavelength of the first and 3rd harmonics.
Complete the table.
harmonic
λ1 =
f1 =
λ3 =
f3 =
1
2
3
4
5
f
λ
A 400g mass stretches a spring 25cm. The spring is then
pushed upward and released causing it to vibrate up and
down. What is the period of the vibrations? Graph the
position, velocity and acceleration for one full period.
original
position
x
t
v
t
a
t
The following graph represents a sound wave. Find the
frequency, amplitude, and wavelength. Write a math model
for the wave.
A pendulum completes takes 6 seconds to complete 5
cycles. Find the length of the pendulum.
A hiker yells and hears the echo from a distant canyon
wall three seconds after he yells. How far away is the
canyon wall? (Speed of sound = 340m/s).
A wave is produced by repeatedly dipping your finger in a
pool 3 times every second. If the speed of the wave in the
pool is 20cm/s, calculate the frequency and wavelength of
the water wave.
Find the beat frequency. If one of the tuning forks is
300Hz, what are the possible values of the other tuning
fork?
Each of the following diagrams represents a moving sound
source. Identify which way the source is moving and
whether its speed is equal to, greater than, or less than the
speed of sound.
```