Simple physics wave question, just need explanation?

Question

Hey, my physics teacher isn't so helpful, I need a how to on this question:

A periodic transverse wave that has a frequency of 10.0 Hz travels along a string. The distance between a crest and either adjacent trough is 2.50 m. What is it's wavelength?

I know that period=1/frequency, frequency=1/period, and speed=wavelength/period. I also know I need the third equation to solve this, but how do I find speed? What am I supposed to do with it?

If someone could do a little walkthrough, it'd be greatly appreciated!

Thanks everyone.

Answer 1

Wavelenght is the distance from a crest to another crest, or a trough to another trough. Since the distance from a crest to a trough is 2.5, you can double that distance to find the distance from a crest to the next crest, 5m.

Think of period as the time it takes for one wave to complete a cycle, and think of frequency as the number of waves that complete their cycles in 1 second.

To find the speed of the wave, simply divide its wavelenght (5) by its period (1/10). Another way is to use the alternate form of the speed equation, if you know frequency instead of period (if you know one, you can find the other easily, but this saves time):

speed = frequency * wavelenght

Multiply 5 * 10 to get 50 m/sec, which is the speed of this wave.

I hope this helped, and good luck!

Answer 2

Below is the links referencing wave phenomena. Check them out.

Wavelength L=2x2.5 m=5m (the length from valley to valley or from crest to crest) from distance between a crest and either adjacent trough is a the of wavelength.

Let me know if it helps.

Answer 3

think of a container with a tiny little bit of somewhat radioactive textile, a Geiger counter, a tube with poison and a mechanism that shatters that tube whilst the Geiger counter "clicks". Now, think of which you placed a cat into that container, close it tight and wait. all of us comprehend that if the radioactive textile emits a particle, the Geiger counter will set off the mechanism that shatters the poison tube, and the cat will die. as quickly as we open the lid after a whilst, we predict to locate the cat the two ineffective or alive, finding on whether a radioactive particle replaced into emitted or no longer. Now, brace your self... Quantum theory states that, untill we certainly open the lid and look, the cat is the two ineffective AND alive. I repeat, that is not the two ineffective or alive, that's the two! What quantum theory quite states is that there is not any reality untill we degree it - there is purely hazard.