I need help with number 15 6:45 9Untitled document (75).pdf13. A wave takes o.25 second to complete four cycles. What is the wave's frequency andPeriod?14. A wave takes 10 seconds to complete two complete cycles.(a) How long does it take to complete one cycle?(b) What is its period?(c) What is its frequency?15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is itsVelocity?16. Two sailboats are anchored 12 m apart. As a series of waves passes, the boats bob up anddown but when one is up, the others always down. What wavelength could produce this effect?17. As a sailor on one of the boat in problem #16, you notice that you go from the highestposition to the lowest position and back to the highest in 4 seconds. (a) What was the period ofthe wave? (b) What was the frequency? (c)) What was its velocity? (Hint: you need to use youranswer from problem # 16)18. The laser in a compact disk (CD) player uses light with a wavelength of 780 nm. What is thefrequency of this light? (Hint: convert nanometers to meters; 1m = 10'nm .19. NPR (National Public Radio) broadcasts at 89.3 MHz (or 89300000 Hz). Radio waves travelat the speed of light, which is 3X 10" m/s . What is the wavelength that NPR uses to broadcastits news?20. What is the energy of an ultraviolet photon having a wavelength of 1. 18 X 10 m?(Hint 1: first usec = f, where c = 3 X 10°m/s, to find the frequency).(Hint 2: then substitute the value of frequency in E = hf, where h = 6. 626X10".s

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Answered: 15. A certain water wave has a…

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15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is its Velocity?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter17: Physics Of Hearing

Section: Chapter Questions

Problem 27PE: (a) Ear trumpets were never very common, but they did aid people with hearing losses by gathering...

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Concept explainers

Wave Motion

A wave motion is defined as the propagation of disturbances or transfer of energy and momentum from the state of rest or equilibrium to another point in a medium without any actual transfer of matter between them. In a simple explanation, it is the propagation of energy through a medium that is produced due to the repeated vibrations of the particles. Common things we see day to day like waves on water oscillation of a pendulum or bell, light wave, and all the subatomic particles exhibiting wavelike properties. The propagation of waves depends on the medium and their properties. The wave function is the disturbance that produces waves as a function of time. This disturbance oscillates periodically with a fixed frequency and wavelength. There are linear wave motion and non-linear wave motion based on their propagation, motion, and time period where linear wave motion is like sinusoidal waves and non-linear wave motion like a wave motion that gets interrupted in the middle of their propagation.

Question

I need help with number 15

6:45 9
Untitled document (75).pdf
13. A wave takes o.25 second to complete four cycles. What is the wave's frequency and
Period?
14. A wave takes 10 seconds to complete two complete cycles.
(a) How long does it take to complete one cycle?
(b) What is its period?
(c) What is its frequency?
15. A certain water wave has a wavelength of 25 m and a frequency of 0.25 Hz. What is its
Velocity?
16. Two sailboats are anchored 12 m apart. As a series of waves passes, the boats bob up and
down but when one is up, the other
s always down. What wavelength could produce this effect?
17. As a sailor on one of the boat in problem #16, you notice that you go from the highest
position to the lowest position and back to the highest in 4 seconds. (a) What was the period of
the wave? (b) What was the frequency? (c)) What was its velocity? (Hint: you need to use your
answer from problem # 16)
18. The laser in a compact disk (CD) player uses light with a wavelength of 780 nm. What is the
frequency of this light? (Hint: convert nanometers to meters; 1m = 10'nm .
19. NPR (National Public Radio) broadcasts at 89.3 MHz (or 89300000 Hz). Radio waves travel
at the speed of light, which is 3X 10" m/s . What is the wavelength that NPR uses to broadcast
its news?
20. What is the energy of an ultraviolet photon having a wavelength of 1. 18 X 10 m?
(Hint 1: first usec = f, where c = 3 X 10°m/s, to find the frequency).
(Hint 2: then substitute the value of frequency in E = hf, where h = 6. 626X10".s

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