My physics teacher actually just sent me a link to your video. To be honest, I'm happy she did, because you explained a lot better and easier than she did. Thank you so much!
@jorgeyboy3364
9 жыл бұрын
Great teaching man, very nice and clear explanation. So much better than my physics teacher! Thanks a lot
@wiktortrzuskot7406
9 жыл бұрын
Fantastic video, I learned more in 10 minutes versus the 50 minutes it took my professor to explain the experiment. Thank you!
@jameyclarke5207
3 жыл бұрын
Thanks David, l am doing a similar lab in class right now and have 2 online lab groups that I am sending to your video. Very nice work. BTW, I actually emailed walter fendt to get him to publish english translation of this simulation. Saw a talk a few years ago at AAPT about how many folks adopt misconceptions about what graphs of sound waves actually represent and I think the Fendt simulation is the best one for showing the correct explanation.
@christinejestel6530
5 жыл бұрын
Thank you so much! First time teaching the content as a Chemistry teacher turned AP physics teacher This was very helpful!
@freddymansour4881
9 жыл бұрын
Really clear. It's EXACTLY what I'm required to do tomorrow. Thanks a lot.
@KingPapaNoodle
7 жыл бұрын
Thanks so much! Was trying to work through this lab tomorrow I need to teach the students and this helped me wrap my head around what I need to convey to them for the lesson
@jferro96
8 жыл бұрын
Learned more with you than in 2 lectures of my professor. Great video!
@Valkie4444
6 жыл бұрын
Omg, you're the best. My physics teacher did not explain this to me at all and you saved my life. Thank you so much!!!!!
@Danleesixoneonetwofive
2 жыл бұрын
You are a wonderful teacher who is patient
@yourally
Жыл бұрын
Really well-structured video. Thanks from a Grade 11 IB kid!
@haniehseilsepour4123
4 жыл бұрын
I wish you were my physics instructor, thank you so much for the helpful amazing video sir :)
@imazariah9774
5 жыл бұрын
actually u r a good lecture ..this is really helping
@nelliparambilsreebhaghavat4276
4 жыл бұрын
Thank you so much sir.....from Kerala.😊👌👍🙏
@robertowisconetti2732
4 жыл бұрын
thank you sir. you are a bloody legend
@vintagesparkles4289
3 жыл бұрын
for n=1, n=3 for 512 hz what is the length??? is it the same for n=1 and n=3? Please help thank you
@katerinahasiotis3752
8 жыл бұрын
thank you I couldnt find anyone else that helped me with finding velocity
@onesmusmukethi8940
3 жыл бұрын
Educative...I watched this & realized the whole concept.
@freshnewday
8 жыл бұрын
Thank you for a great video of clear explanation! This was very helpful.
@Tom-sp3gy
4 ай бұрын
Beautiful!
@oxford_phd
10 жыл бұрын
Pretty cool thanks!
@helanikumarawadu1752
7 жыл бұрын
Great job! Thank you very much.
@calebcullen4794
2 жыл бұрын
Got sent here by the Stroudster
@dilljw5094
2 жыл бұрын
SAME
@kricket11ed
10 жыл бұрын
Very good demonstration
@imazariah9774
5 жыл бұрын
i really love this...
@malakn4134
11 жыл бұрын
Thanks mate i have an exam coming up and i didnt understand anything from the lecture but u covered everything relating to it thank alot if you could do alesson about specifiec heat of solid befor next wensday pleade that will be really helpfull
@matthewperkins288
4 жыл бұрын
David, I do this experiment with my Physics class every semester. Our numbers always come up a little lower than the expected speed of sound in room temperature air. i wonder why that is... I love the lab!
@patriciarigters7707
3 жыл бұрын
do you know by any chance why it's lower?
@matthewperkins288
3 жыл бұрын
@@patriciarigters7707 I do not know. We just did the lab again and get fairly accurate numbers at 5/4L.
@matthewperkins288
3 жыл бұрын
@@patriciarigters7707 I believe I have solved this! At the first node the numbers are low. They are accurate though. If we draw a compressional wave diagram we would notice that inside the tube is the rarefaction. The rarefaction is of lower density than the air in the room! Therefore the speed of sound is ACTUALLY lower since the velocity is based on the density of an object. We are creating a sort of vacuum in the tube at the first node. At the 5/4L spot we have about equal rarefactions and compressions, therefore the speed of sound is very close to what it would be in the room.....340m/s.
@matthewperkins288
4 ай бұрын
I believe you have nailed it. The numbers are accurate, because...they have to be really...but the actual density is changing in the medium. Thank you!
@Rishinath23
10 жыл бұрын
thanks dude ,good work,keep it up
@tapankumarbasu2901
7 жыл бұрын
Well Explaned !
@hanasalam3519
8 жыл бұрын
Very use full 👍🤗
@armadillostudios2720
3 жыл бұрын
Very epic video!
@vahagnmelikyan2906
Жыл бұрын
Is that a diagram or that's how rye sound wave actually moves.which direction does it move.
@NappyHappyDrumMajor
8 жыл бұрын
very helpful, thank you!
@TheJosrx
9 жыл бұрын
Awesome!....
@ginak9696
8 жыл бұрын
Don't we hear loudness at pressure antinode which is also displacement node? I'm confused.
@lailaalsalmi824
4 жыл бұрын
thank you
@SamuelWediMebre
7 жыл бұрын
Thanks, great explanation. Can anyone tell what are the main source of errors
@patriciarigters7707
3 жыл бұрын
did you find out what it was?
@WGESTAXKS
3 ай бұрын
Might be a dumb question but does anyone know what T is supposed to represent
@williamcornelius7076
10 жыл бұрын
A wavelength is from a crest to a crest. So why do you have one wavelength for where there are two?
@purandaranarayanabhatk1031
4 жыл бұрын
Very interesting fine
@pierreretief
6 жыл бұрын
Would like to see some of the experimental values
@rupavemulapalli7823
7 жыл бұрын
LIFE SAVERRR
@ericmohler462
2 жыл бұрын
I did this lab yesterday and noticed something I also see in your video, which is volume spikes at air column lengths much less than lambda/4. For example, near the end of year video you experiment with 256 Hz and there is a noticeable volume increase at just 10 cm, whereas the the theoretical calculation (speed of sound/256 Hz/4) predicts the first volume increase at 0.33 meters or 33 cm. Is this an "overtone" shining through? We also noticed this result with tuning forks of low frequency. I can't think of another explanation, but I thought I would ask a pro...I'm just a calculus teacher who minored in physics 30+ years ago, and our administration asked me to dust off my minor this year due to staffing needs.
@panoskirilis
7 жыл бұрын
ΤΗΑΝΚ ΥΟU VERY MUCH!
@ghaithballich5952
2 жыл бұрын
I can't seem to understand how you are getting the (N) its confusing me.
@kevinpolpitiya3200
3 жыл бұрын
Thank you!!
@meghnadatta4198
9 жыл бұрын
But I think that for closed organ pipe the formula is l=(2n+1)/4
@caitlinharcombe6183
5 жыл бұрын
When you say that the tube is closed at one end, is it literally closed as in the pipe's not being filled up with water or that it's closed as in the water kinda makes it closed? that probably doesn't make any sense but basically I need to know whether the pipe is closed by definition of that there is no water in it or if it's just "closed" because the water's surrounding it
@jacky61006
9 жыл бұрын
Very helpful.
@eleazarhinojosabarrera5839
7 жыл бұрын
If I fill the tube with a liquid, Could i calculate the speed of sound in that liquid? Does it works if i fill the tube with kitchen oil for example, would it work?
@khaledi6540
8 жыл бұрын
thanx, its very helpful
@skaamir9810
7 жыл бұрын
how to find correct length
@1985tris1
6 жыл бұрын
What program were you using to display the wave lengths and the actual compression waves? Is it an online source or a purchased program?
@davidtaylor2125
6 жыл бұрын
Here is a good animation of standing longitudinal sound waves - www.acs.psu.edu/drussell/Demos/StandingWaves/StandingWaves.html
@Anonymous-po9gy
Жыл бұрын
Anyone got the answers for the question at the end
@columbus0t6
10 жыл бұрын
What did you use for the inner pipe? PVC?
@ranianasar6416
9 жыл бұрын
thank u so much for the video its very helpful :)
@user-qn2oc7fg7c
6 жыл бұрын
Can I ask a question please?
@kumrostand
Жыл бұрын
Thanks alot God bless you I'll like to be your student
@varunaravapalli1697
6 жыл бұрын
when recording the length of the tube, do we have to measure the length that is in the water or the length that is outside of the water?
@xdavetaylorx
6 жыл бұрын
Measure the length of the tube from the water's surface to the top of the tube. That's the length of the tube where the standing wave interference pattern is occurring. Sound passes down the tube and reflects off the water's surface back up the tube. The standing wave interference pattern happens because the incident wave interferes with the reflected wave - constructive interference at the antinodes and destructive interference at the nodes. A STANDING wave only occurs at lengths of the tube that start at 1/4 of the sound's wavelength and increase at 1/2 lambda increments. The requirement for the standing wave is a node at the water's surface and an antinode at the open end of the tube.
@UDAYKUMAR-jd8xr
7 жыл бұрын
good one 👍👍👍
@smith1162
3 жыл бұрын
Hi mr Dani
@vvemunoori
9 жыл бұрын
What is the next possibility
@FATTMONSTER
8 жыл бұрын
9pai / 4
@dinahashem3263
8 жыл бұрын
this experiment with a closed tube what about an open tube ? ?
@inurihettiarachchi9780
7 жыл бұрын
Dina Hashem can we do it with an open tube?? Is it practical??
@muhammadakhtar429
3 жыл бұрын
Sir I want to contact with you.
@muhammadakhtar429
3 жыл бұрын
Sir I want to contact with you.
@chynx293
4 жыл бұрын
thanks
@lawrencecerniglia6608
7 жыл бұрын
This is to find the velocity of sound waves in air?
@davidtaylorfuhsd
7 жыл бұрын
Yes, the air in the tube.
@lawrencecerniglia6608
7 жыл бұрын
Thank you. Would the temperature of the water affect the air temp nearby, in turn affecting the speed of the sound?
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