Resonance and Sound

Question 1

Waves with the same amplitude and wavelength travelling in opposite directions result in an interference pattern called a ________ wave

Answer 1

standing

Question 2

At some times, standing waves are completely out-of-phase resulting in destructive interference at every point resulting in ____ displacement

Answer 2

zero

Question 3

If two waves pass through each other in opposite directions, they continually shift in and out of phase to produce a wave that seems to oscillate between fixed locations of ___________ and ____________ interference

Answer 3

destructive and constructive

Question 4

_____ are parts of the wave that never leave the equilibrium position

Answer 4

nodes

Question 5

the peaks of the standing wave that oscillate between maximum displacements

Answer 5

antinodes

Question 6

nodes and antinodes appear every ____ wavelength along the equilibrium line.

Answer 6

half!!

Question 7

Standing, or stationary, wave patterns can be observed on a stretched string or wire that is _____ at both ends

Answer 7

fixed

Question 8

The frequencies at which standing waves can exist in a string of a given length are the _______ or resonant frequencies of the string

Answer 8

natural

Question 9

When energy is added to the string, the initial wave goes DOWN the string and reflects from the _____ end.

Answer 9

fixed

Question 10

The reflected wave __________ with the incident wave

Answer 10

interferes

Question 11

If the waves are at the FUNDAMENTAL frequency or if they have one of a number of ________ frequencies, a stationary wave results.

Answer 11

OVERTONE

Question 12

(True/False) A string vibrating at the fundamental frequency has only one antinode and a node at either end.

Answer 12

TRUE

Question 13

What is the length of the string equal to?

Answer 13

(1/2) λ

Question 14

For a standing wave pattern to exist, the number of wavelengths on the string depends on what?

Answer 14

THE LENGTH OF THE STRING

Question 15

In music, overtones or harmonies can exist in the same string as the what?

Answer 15

fundamental frequency

Question 16

If an air column is closed at one end and open at the other, it is referred to as a what?

Answer 16

closed air column

Question 17

When a vibrating tuning fork is held over the open end of such a column and the length of the column is changed, it is found that the ______ increases sharply at very specific lengths

Answer 17

VOLUME

Question 18

Increased volume due to a tuning fork over an closed air column is because of _________ at the length

Answer 18

RESONANCE

Question 19

Longitudinal sound waves can also form standing or ________ waves

Answer 19

resonant

Question 20

When an antinode occurs at the open end of the column, _________ is heard

Answer 20

RESONANCE

Question 21

when a ____ occurs at the open end of the column, no resonance is heard

Answer 21

NODE

Question 22

(1/4)λ + any number of (1/2)λ will produce what?

Answer 22

RESONANCE

Question 23

(True/False) Resonance will occur when the open air column is (1/4)λ, (3/4)λ, etc

Answer 23

FALSE