1. 5*3 Sounds in Strings Revisited
WDYS??? (p508) .
WDYT???
The pitch changes as you change the tension in the string because _____.

2. 5*3 Investigate (p508)
3. Draw AND label a STANDING WAVE 4. The length of the string = ½ λ, therefore λ = 2× length of the string
Length (cm) λ
(cm)
Pitch
(low, medium, high)

3. 5*3 Investigate (p508)
5a) The pitch (frequency) _____ as the string is made shorter while tension remains the same. 7a) The wavelength _____ as the string is made shorter while tension remains the same.

4. 5*3 Investigate (p508)
8. The greater the tension (more mass), the higher the pitch…The length of the string stayed the same, therefore the λ remained the same… 8a) The wave property that changes when the tension in increased is the _____. Therefore, the faster the wave travels, the _____ the frequency and the _____ the pitch.

5. 5*3 Physics Talk (p510) 1. Frequency and Wavelength
Wavelength (λ) = 2× length of string
Length of string = ½ λ
The higher the pitch, the _____ the frequency, the _____ the string, the _____ the wavelength
v = f × λ f = v / λ λ = v / f
λ is INVERSELY related to the f (pitch)

6. 5*3 Physics Talk (p510) 2. Tension of a String & Frequency
An increase in tension produces a larger force
A larger force will make a greater acceleration
A greater acceleration generates a faster vibration
A faster vibration = A faster velocity
v = f × λ f = v / λ λ = v / f
v is DIRECTLY related to f (pitch)

7. 5*3 Physics Talk (p510) 2. Thickness of a String & Frequency
Thicker strings = Lower frequency and pitch
Increased mass = Increased force and tension
Heavier mass = smaller acceleration
Slow acceleration = slow velocity
v = f × λ f = v / λ λ = v / f
v is DIRECTLY related to f (pitch)

8. 5*3 Physics Talk (p510) 3. Is There an Equation???
Standing Waves occur when the length of the string and wavelength have a particular relationship
L = (n × λ) λ = (2 × L) n = (2 × L)
n λ
***n = # of antinodes in the standing wave***

9. 5*3 Checking Up (p514)
If you decrease the wavelength of a wave, the frequency ___. The equation for frequency is ___.
Increasing the tension of the string _____ its pitch.
When the tension of the string is increased, the wave speed _____; therefore, the speed of a wave is _____-related to its tension.
The equation for length of coiled spring and the wavelengths of standing waves is _____.

10. 5*3 Physics To Go (p517)
Increasing the tension _____ the frequency of the vibrating string.
Increasing the length of the string _____ the wavelength of the pattern.
To keep the frequency the same, the length and the tension _____.
The wavelength and frequency would BOTH change if the length _____ and the tension _____. If BOTH length and tension increased OR decreased TOGETHER, the pitch would change.

11. 5*3 Physics To Go (p517)
5. The guitarist changes the tension in the vibrating strings in order to change the _____ which leads to a change in pitch. 6. The more massive the string, the _____ the wave speed and the _____ the frequency and pitch.

12. 5*3 Quiz .