What is its period in the water?

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Homework Help Overview

The discussion revolves around a physics problem involving a sonar signal with a given frequency and wavelength in water, specifically focusing on determining its period in both water and air.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the definition of period and its relationship to frequency. Questions are raised about whether the frequency changes when the wave transitions from water to air.

Discussion Status

Some participants have provided insights regarding the relationship between medium and wave properties, noting that while speed and wavelength may change, frequency remains constant. This has led to further exploration of the implications for period in different media.

Contextual Notes

There is a focus on understanding the effects of medium on wave properties, with participants questioning assumptions about how these properties interact during a transition from water to air.

aerogurl2
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i need some help on this problem:
A sonar signal of frequency 1.00x10^6 Hz has a wavelength of 1.50mm in water.

a) What is its period in the water?
b)What is its period in the air?

Can someone guide me through the steps in order to arrive to the solution or explain to me how to solve this? Thanx:smile:
 
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aerogurl2 said:
i need some help on this problem:
A sonar signal of frequency 1.00x10^6 Hz has a wavelength of 1.50mm in water.

a) What is its period in the water?
b)What is its period in the air?

Can someone guide me through the steps in order to arrive to the solution or explain to me how to solve this? Thanx:smile:
What is the definition of period? It is simply one over the frequency.
When a wave changes medium (water to air) does the frequency change?
 
the medium doesn't travel with the wave so it wouldn't effect the period is that right? so the period for both water and the air would be the same?
 
aerogurl2 said:
the medium doesn't travel with the wave so it wouldn't effect the period is that right? so the period for both water and the air would be the same?
Your conclusion is correct but it's not because the medium does not travel with the wave. When a wave changes medium, its speed *and* its wavelength changes but the frequency does not change (it is ultimately connected to conservation of energy but you should not worry about that).

Patrick
 
oki thanks for your help Patrick:smile:
 
aerogurl2 said:
oki thanks for your help Patrick:smile:
You are most welcome. And best luck!
 

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