stationary waves 2

Question 1

What does the stationary wave practical investigate?

Answer 1

how the frequency of stationary waves on a string changes when length, tension and mass per unit length are changed.

Question 2

what are the steps of carrying out the stationary wave practical

Answer 2

measure length, tension and mass of the string

Question 3

How can the tension of the string be calculated?

Answer 3

multiplying the total mass of the masses and the acceleration due to gravity.
T=mg

Question 4

How can the mass per unit length be calculated?

Answer 4

multiplying the total mass of the masses and the acceleration due to gravity
u=m/l

Question 5

How can you investigate the effects of changing the length of the string on the resonant frequency?

Answer 5

keep the tension and mass per unit length the same.
Vary the length of the string by moving the oscillator away or toward the pulley.
At each string length, find the new first harmonic.
Plot a graph of f against l.

Question 6

how do you investigate the effects of mass on the resonant frequency?

Answer 6

keep the tension and length the same.
Vary μ by using different types of material for the string.
For each material (with a different value of μ), find the new first harmonic.
Plot a graph of μ against f.

Question 7

what is the first harmonic equation?

Answer 7

f=1/2L times square root of tension/mass

Question 8

what is the relationship with length and frequency?

Answer 8

the longer the length of the string, the lower the frequency as half the wavelength will be longer

Question 9

what is the relationship with mass with frequency?

Answer 9

the greater the mass, the lower the frequency as the frequency will travel through a heavier string

Question 10

equation of frequency

Answer 10

v/wavelength

Question 11

what is the relationship with tension and frequency?

Answer 11

the higher the tension, the higher the frequency as waves travel more quickly down a string with high tension