I have trouble with these 2 problems, can anyone assist me to answer them?
18) What is the speed of a periodic wave disturbance that has a frequency of 3.50 Hz and a wavelength of 0.700 m?
21) A periodic longitudinal wave that has a frequency of 20.0 Hz travels along a coil spring. If the distance between successive compressions is 0.600 m, what is the speed of the wave?
18) Multiply wavelength by frequency.
21) 0.600 is in this case the wavelength. Once again, multiply ot by the frequency to get the wave speed.
Of course, I can help you with these problems! Let's solve them step by step.
18) To find the speed of a periodic wave disturbance, you can use the formula:
v = f * λ
where:
v is the speed of the wave
f is the frequency of the wave
λ is the wavelength of the wave
In this case, the frequency (f) is given as 3.50 Hz, and the wavelength (λ) is given as 0.700 m.
Substituting the values into the formula, we get:
v = 3.50 Hz * 0.700 m
Multiplying the values together, we find that the speed of the wave is:
v = 2.45 m/s
So, the speed of the periodic wave disturbance is 2.45 m/s.
Now let's move on to the next problem.
21) To find the speed of a periodic longitudinal wave, we can again use the formula:
v = f * λ
Here, the frequency (f) is given as 20.0 Hz, and the distance between successive compressions (wavelength, λ) is given as 0.600 m.
By substituting the given values, we have:
v = 20.0 Hz * 0.600 m
Multiplying these values together, we find that the speed of the wave is:
v = 12.0 m/s
So, the speed of the periodic longitudinal wave is 12.0 m/s.
I hope that helps! Let me know if you have any further questions.