Harmonics on a String

The # of wavelengths of the 3rd harmonic is:

• 2.5

• 2

• 1.5

• 1

• 0.5

Tags

NGSS.HS-PS4-1

A fundamental harmonic has a 1.1 meter string length AND a frequency of 7.4 Hz.

(*2 Parts:)

The wavelength of this standing wave is:

The speed of this wave is:

• 3.3 m; 8.2 m/s

• 2.2 m; 16.3 m/s

• 2.2 m; 32.6 m/s

• 1.1 m; 16.3 m/s

• 1.1 m; 8.2 m/s

Tags

NGSS.HS-PS4-1

What is the FREQUENCY of this standing wave?

• 14.7 Hz

• 9.8 Hz

• 4.9 Hz

• 4.1 Hz

• 2.5 Hz

Tags

NGSS.HS-PS4-1

The picture is showing WHAT CONCEPT?

• Constructive interference

• Destructive interference

• Standing waves

Tags

NGSS.HS-PS4-1

A string 2.40 m in length is oscillating in its first harmonic mode. The frequency of oscillation is 7.80 Hz.

• 1.2 m

• 2.4m

• 3.6 m

• 4.8 m

• 6.0 m

Tags

NGSS.HS-PS4-1

USE the picture: *Assume that the wave boundary in the picture is 5 meters. The harmonic PICTURED that has the shortest wavelength is the _____ harmonic and has a wavelength of _____ meters.

• 1st; 10 meters

• 2nd; 5 meters

• 4th; 2.5 meters

• 5th; 2 meters

• 10; 1 meter

Tags

NGSS.HS-PS4-1

The second Harmonic has a frequency of 4 Hertz. The third Harmonic has a wavelength of 2 meters. *Solve: The wave speed of the fundamental is:

• 24 m/s

• 18 m/s

• 16 m/s

• 12 m/s

• 9 m/s

Tags

NGSS.HS-PS4-1

A string fixed at both ends is vibrating in its second harmonic. If the length of the string is 1.5 meters, what is the wavelength of the wave?

• 0.75 m

• 1.5 m

• 3.0 m

• 4.5 m

Tags

NGSS.HS-PS4-1

If a string vibrates at a frequency of 10 Hz in its third harmonic, what is the fundamental frequency of the string?

• 3.33 Hz

• 5 Hz

• 10 Hz

• 30 Hz

Tags

NGSS.HS-PS4-1

A string is vibrating in its first harmonic with a frequency of 5 Hz. If the speed of the wave on the string is 20 m/s, what is the length of the string?

• 2 m

• 4 m

• 6 m

• 8 m

Tags

NGSS.HS-PS4-1