Frequency on a String

A violin string of length 0.54 m and wave speed of 565 m/s along it. Calculate the frequency of the 5th harmonic.

• 1046.3 HZ

• 282.5 Hz

• 3138.89 Hz

• 1546 Hz

Tags

NGSS.HS-PS4-1

The moving black dot is called:

• a node
• an anti-node
• an anti-amplitude
• the wangy bit

Tags

NGSS.HS-PS4-1

The stationary dot is called:

• a node.
• an anti-node.
• the amplitude.
• the not moving bit.

Which harmonic is shown?

• 1st
• 2nd
• 3rd
• 4th

Tags

NGSS.HS-PS4-1

When two waves combine to form a new wave with a smaller amplitude, it is called 

• Refraction
• Constructive Interference
• Resonance
• Destructive Interference

Sketch A shows two identical pulses traveling in opposite directions along a string, each with a speed of 1.0 cm/s. After 4.0 s, the string will look like which of the other sketches?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS4-1

The figure represents a string of length L, fixed at both ends, vibrating in several harmonics. Which string shows the 4th harmonic?

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS4-1

The figure shows several modes of vibration of a string fixed at both ends. The mode of vibration that represents the fifth harmonic is

• 1

• 2

• 3

• 4

• None of these is correct.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

A 1.00 m string fixed at both ends vibrates in its fundamental mode at 440 Hz. What is the speed of the waves on this string?

• 220 m/s

• 440 m/s

• 660 m/s

• 880 m/s

• 1.10 km/s

Tags

NGSS.HS-PS4-1

Resonance occurs when

• an object is forced to vibrate at its natural frequency.
• sound changes speed in going from one medium to another.
• the amplitude of a wave is amplified.
• sound makes multiple reflections

Tags

NGSS.HS-PS4-1