Stationary Wave Resonance

Question 1

Define natural frequency

Answer 1

All objects have their own specific frequency which they naturally oscillate without being forced

Question 2

Define forced oscillation

Answer 2

Oscillation that occurs in an object when an external source applies a driving force to the object

Question 3

Define resonance

Answer 3

The storing energy in an oscillation or stationary wave

Energy coming from external source is matched or close to the natural frequency of object

Question 4

How does a fundamental harmonic occur (String under tension)

Answer 4

When string vibrates forming half a wavelength w nodes at each end

Question 5

Strings : how to know the number harmonic

Answer 5

No. of anti node

Question 6

What does an open tube have at both ends?

Answer 6

Antinodes

Question 7

What can open tubes act as?

Answer 7

Resonators

Basis of all wind instruments

Question 8

Open tube : how to know the number harmonic

Answer 8

No. of nodes

Question 9

Open tube - what is the fundamental harmonic?

Answer 9

1/2 wavelength

Question 10

What does closed tube have at its ends?

Answer 10

Closed end = node

Open end = antinode

Question 11

Closed tube : why is one end open?

Answer 11

Let out sound

Question 12

Closed tube : what is the fundamental harmonic?

Answer 12

1/4 wavelength