Orifice and mouthpieces experiment

hey guys, this video was filmed 2 years back when i was instructing students on the experiment...i had just completed b.tech that time, so please dont judge my explanation point in here..
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Any doubts? Do comment below . i will try my best to solve it
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[@playerunknown7181]

I just want to ask , the length of the mouthpiece must not be longer than 2 to 3 times the diameter of the opening or orifice , but the mouthpiece you indicated far exceeds the diameter of the orifice , please explain or correct me if I am wrong

[@vinothkumar-rz1ui]

Bro, you are correct mouthpiece should be 2 to 3 times the diameter of orifice but the length of the mouthpiece will change

[@MNanimationCompany]

Sweet voice mam...I love it

[@shubhdeepak6414]

Simp

[@nissarahmad2276]

So much helpful

[@mohmmedakhilakhil1449]

excellent explanation tank u

[@howtowatchmaria6410]

Gd

[@rudradecoration6010]

Very nice exaplin

[@prabhanshutiwari9085]

Thankyou very much 😊

[@vishwasvishista2901]

Nyc

[@amurunkownfriend1518]

Supper ur voice😊

[@akhildasg6917]

What is x2, y2

[@mahtabali5757]

good English voice

[@naveen.kydear3738]

if u done the Values calculation it would be more useful....✌🏻

[@mohmmedakhilakhil1449]

naseerin

[@syedminhaj8924]

mms banadiye kya 😂

[@mahtabali5757]

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