Waves

Question 1

Conditions for stationary waves

Answer 1

Two waves travelling at the same speed in opposite directions overlap.
They have the same frequency and wavelength and amplitude.

Question 2

Describe the Doppler effect.

Answer 2

The doppler effect is when the frequency emitted by a source is different from the frequency observed by the observer due to movement of the source relative to the observer.

Question 3

State the difference between a stationary wave and a progressive wave in terms of the phase of two adjacent vibrating particles.

Answer 3

Adjacent particles in phase.

Wdym adjacent??

Question 4

State what is meant by an antinode of the stationary wave.

Answer 4

1.Position where amplitude is maximum.

2.
λ = n x d
V = fλ

Question 5

Steps to calculate the distance between a node and an adjacent antinode.

Use this to find frequency provided speed of wave is v ms‐¹

Answer 5

Dist = λ/4

d = total length of tube / ???

Question 6

How do you know whether to add or substrate cells if they are in series.

Answer 6

if they are in the same orientation when you follow the wire as if it were horizontal(-+…….-+), add.
If they are opposite (-+…..+-) then substract.

Cells in series are connected +ve to +ve and -ve to -ve