Waves, pulses, sound and things of that nature

In summary, the conversation discusses various equations and solutions related to a physics exam and homework. It mentions using the given diagram and information to find values for wavelength, velocity, and frequency, as well as solving for displacement and other variables. The conversation also discusses the values of dy/dt and dy/dx in certain points.
  • #1
PhillipRussel
8
0

Homework Statement



http://insight.ccsf.edu/file.php/4599/PDF/Exam1-Fall-2011.pdf

Homework Equations


v^2=T/μ
κλ=2∏
ω=2f and many more

The Attempt at a Solution


Starting with 1a the λ is 4/3*.015cm=.02cm since by the diagram the distance between the labeled point is 3/4 the wavelength

Now I'm not so sure about v. I don't think the diagram is used but in the given info in the statement. v=.3cm/.00075s right

And then the f is equal to v/λ right

I'll get to more later. I need to finish some astronomy homework real quick lol
 
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  • #2
for f may need to use displacement=2*pi*f*t or more exactly 0.3cm=2*pi*f*.00075s actually. what do you think
 
  • #3
for 1b I am thinking dU/dx equals zero at (Xa,t1) and (Xb,t2). I'm still thinking about the other two. i know dy/dt=-v*dy/dx but am not certain of the values of dy/dt or dy/dx. I have a suspicion that dy/dx may be .5 at those other points.
 

FAQ: Waves, pulses, sound and things of that nature

What are waves?

Waves are a disturbance or oscillation that travels through space and matter. They can be categorized as mechanical or electromagnetic, based on the medium through which they travel.

What is the difference between a wave and a pulse?

A wave is a continuous disturbance that propagates through a medium, while a pulse is a single disturbance that travels through a medium and then dissipates. In other words, a pulse is a single wave that has a finite duration and travels through a medium without repeating itself.

How does sound travel?

Sound travels through the air as a series of compressions and rarefactions, or areas of high and low pressure. When an object vibrates, it causes these pressure waves to propagate through the air, which are then detected by our ears.

What is the speed of sound?

The speed of sound varies depending on the medium through which it travels. In dry air at room temperature, sound travels at approximately 343 meters per second. This speed increases with temperature and density of the medium.

How are waves and sound used in everyday life?

Waves and sound are used in a variety of ways in everyday life. Some common examples include using sound waves for communication through phones and radios, using electromagnetic waves for wireless internet and television, and using waves in medical imaging techniques like ultrasound. Sound is also used for entertainment, in the form of music and movies.

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