Stationary waves

Question 1

1st harmonic

Answer 1

2 nodes and 1 antinode

Question 2

2nd harmonic

Answer 2

3 nodes and 2 antinode

Question 3

What is a node

Answer 3

A point along a standing wave with 0 amplitude

Question 4

What is an antinode

Answer 4

A point along the wave with max amplitude

Question 5

What is the distance between a node and antinode

Answer 5

1/4 of a wave

Question 6

Difference between progressive and stationary wave 1

Answer 6

Each point along a progressive wave has equal amp but amp varies for standing wave

Question 7

Difference between progressive and stationary wave 2

Answer 7

Adjacent points on progressive waves vibrate with diff phase but all particles between nodes in standing waves vibrate in place

Question 8

Difference between progressive and stationary wave 3

Answer 8

Energy is transferred through space in progressive waves but not in the case of standing waves

Question 9

Velocity of a wave in a string

Answer 9

V = √’T/u

Question 10

What is t in equation V = √’T/u

Answer 10

Tension

Question 11

What is u in equation V = √’T/u

Answer 11

Mass per unit length

Question 12

Fundamental frequency

Answer 12

Lowest freq to get standing wave

Question 13

Frequency of first harmonic in closed pipe

Answer 13

V/2l

Question 14

Frequency of second harmonic in closed pipe

Answer 14

V/l

Question 15

Frequency of third harmonic in closed pipe

Answer 15

3v/2l

Question 16

Frequency of first harmonic in pipe open ONE END ONLY

Answer 16

V/4l

Question 17

Frequency of second harmonic in pipe open ONE END ONLY

Answer 17

No second harmonic

Question 18

Frequency of third harmonic in pipe open ONE END ONLY

Answer 18

3v/4l

Question 19

Why is there no second harmonic in pipes open ONE END ONLY

Answer 19

There’s no even harmonics