The last tuning fork was 512 Hz. I didn't use 489 Hz. This is a demo for my students, so I only used a small number of examples.
@MrEnvy999
12 жыл бұрын
good video!
@umeshkumarshanthappa8731
6 жыл бұрын
nice
@vinathikambham5985
7 жыл бұрын
Thank u so much edunovus.i understood the vedios with out any doubt.before this I was struggling a lot.but after watching this I became perfect.
@bios546
9 жыл бұрын
Why do you add that 1 cm? isn't the sound wave always with an antinode in the mouth of the vessel and a node on reflection?
@alextheape
9 жыл бұрын
ess kp Look up "end correction" in relation to standing waves in open tubes. I just had all of my high school students slam headlong into this issue when I had them do this experiment with tubes that had a diameter around 8 cm. It adds a significant offset which nobody seems to talk about.
@ifafv
9 жыл бұрын
alextheape Thanks for posting this response. I have my students perform the standard lab book experiment*: for the ten tuning forks that they use they usually get averages between 335 and 345 m/s (should be 343 at room temperature) and between 325 and 330 m/s (outside on a mild Alaska winter morning). I didn't know that the extra 1 cm that I use is termed "end correction" and that its use goes back to Lord Rayleigh. * Loyd and hyperphysics mention the end correction, Nolan doesn't (Nolan and Loyd don't need it actually because they have the experimenter subtract the 1/4 from the 3/4 wavelength measurement).
@alexsteinkamp2703
9 жыл бұрын
Andy Veh The challenge I'm facing is trying to make this an inquiry experiment where students have some understanding of resonance and I say "figure out the speed of sound", with nearly no procedural prompting. I'd say doing a difference between modes is beyond their ability to create on their own, and this effect isn't otherwise determinable unless you know it will exist, so I think my best option is to give them materials where the end effect can be swept under the rug (narrow pipes).
@jueedhar5449
6 жыл бұрын
i have a ques ,i think that the tuning fork should be rotated 90 degrees about the axis of the tuning fork as the waves produced will move along that direction and not face down .Pls comment.
@ifafv
5 жыл бұрын
You might be right. However, I checked a lab manual (other than my own that I wrote) and it didn't specify. Also, I don't tell students how to hold the tuning fork, so they probably hold it half the time my way, the other half the time your way. But no matter how, they always got good results. (It would be interesting for me to test what you're saying and see if it makes a difference.)
@aqsaayyoub8409
5 жыл бұрын
water is only in a reservior
@bios546
9 жыл бұрын
Is the temparature there 12.78 degree celcius?
@ifafv
5 жыл бұрын
It's about 20 C.
@TheBottleNeckEffect
12 жыл бұрын
@ipodboqi1 and maybeee thats why its working?
@aqsaayyoub8409
5 жыл бұрын
sir explain the logics behind the use of water
@ifafv
5 жыл бұрын
The water is not part of the experiment. Instead it supplies a surface whose distance to the opening can easily be changed, hence the distance where resonance occurs can be determined.
@123mmist
12 жыл бұрын
I Want explain in Englis sub or English solution
@joshkarlowicz8569
6 жыл бұрын
You didn't show what the set up is and you said the speed is dependent on frequency in the end. Its dependent on air temperature, pressure, temperature
@ifafv
5 жыл бұрын
I said "independent of frequency". However, with my German accent, my speaking quickly, and focusing on too many things (experiment, filming, talking) the "in-" prefix was rather quiet.
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