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Yifan Gong
เข้าร่วมเมื่อ 31 ธ.ค. 2011
comparison of several common soap dish holders
this short video gives a comparison of several common soap dish holders. I'm amazed by the difference simple design concepts can do to make the soap holder much more user-friendly.
มุมมอง: 13
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Hermit crab flipping back to safe position
มุมมอง 245 ปีที่แล้ว
In danger belly up hermit crab amazingly flips back to walking position.
Polish hen laying egg Part 3/3: Laying Egg Final
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Watch a polish hen complete her process on laying an egg. Part 3: Laying Egg Final
Polish hen laying egg Part 1/3: Digging a Nest
มุมมอง 4979 ปีที่แล้ว
Watch a polish hen start her process on laying an egg. Part 1: Digging a Nest
Polish hen laying egg Part 2/3: Warming Up
มุมมอง 1769 ปีที่แล้ว
Watch a polish hen during her process on laying an egg. Part 2: Warming Up
Surface tension of liquid - water vs. Alcohol
มุมมอง 92K9 ปีที่แล้ว
Using water and alcohol to show surface tension on a penny! Materials- Water Alcohol (Ethanol) Dropper Penny
The question I'm supposed to answer is: How many drops of water fit on the penny? How many drops of alcohol? But when I counted in slow playback speed a few times, I counted 51 drops of water and 24 drops of alcohol, and the last ones of those made it spill over so fitting without spilling over the penny it would 50 drops of water and 23 drops of alcohol, but at the end of the video the paper said 54 drops of water and 18 drops of alcohol.
I had to watch this for chem class
I'm fascinated by your soap holder comparisons! Keep up the good work👍🏻
POV: you're in mr. clark's class
i wuv daddy cwark
Best experiment to understand surface tension...thank u
Idk why I'm watching this😂😂
oh yeah
Keep making videos like this . NICE
POV: You're doing online school
Yepperooiny
i counted 63 drops
For those of you who were wondering, I counted 51 drops of water and 24 drops of ethanol.
gracias
Thank you sm!
I counted 52 drops of water and 25 drops of ethanol but close enough 😁
How come the drops float on the alcohol but not on the water if the surface tension is lower.
wow I counted way more drops of alcohol
I think you miscounted, Sir. I counted 48 drops (not counting dropper spirts of air) to 24 drops (counting for camera angle error and lighting) for alchohol.
1:00 to 1:16 very tense moments
what if we mix them?
it is 24 drops of alcohol not 18
You're right! I just counted the drops. I needed this for a Biology assignment.
Hi, I'm curious about how you actually calculated the surface tension for both water and alcohol?
i think there is formula for that
@@sirmanki given the wording of the question, I think that's what was asked. See labman.phys.utk.edu/phys221core/modules/m7/surface_tension.html
@@emailfilters that's actually pretty cool, also thanks for the reply
I think he would have done something with number of drops and area of the coin......
A close up on the penny in the end? Sure why not.
gotta thank the lab assistant
This would be a great experiment to do with loads of liquids. You could try non polar molecules like petrol, or highly polar molecules like HCl (alrhoughy I guess you'd need a less reactive coin coated in silver or something). You could try it at different temperatures, all sorts
not that alcohol, rubbing alcohol
nice video👍👍
I counted 52 and that's a lot for water on a small penny.
He's lying, it's actually 49 drops.
IWANTTODIE
Now is the best for anything
ok
@@penguinsniper155 Who's watching in 2020?
sounds lagite
ha. I like this video. Should be on the front page.
Sure, if the page is yours