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Physics Balloons expanding in a vacuum 2007 Sec 1 @ JE
Posted by: petersplim
Video duration: 201 seconds
Global video hits: 404
Related: 1, 2007, @, a, balloons, expanding, in, je, physics, sec, vacuum
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![Liquid nitrogen poured onto students\](http://img.youtube.com/vi/zJwOTFm6DWg/2.jpg "Liquid nitrogen poured onto students\") |
Liquid nitrogen poured onto students' hand
Posted by: petersplim
Video duration: 209 seconds
Global video hits: 1514
Very cold liquid nitrogen vapourises immediately upon contact with warm object s like our skin. The vapour forms an insulating layer preventing more heat being lost from our warm palms. Caution: do not did your hand into liquid nitrogen for more than 1 second. Do visit our education website at www.PLsingapore.com
Related: coronation, cp, hand, liquid, nitrogen, petersplim, pl
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PL students munching liquid nitrogen-cooled biscuits
Posted by: petersplim
Video duration: 243 seconds
Global video hits: 171
When very cold liquid nitrogen cools the humid air inside our mouth,condensed droplets of water form. They come out through our nostril as "smoke"
Related: liquid, lucia, nitrogen, petersplim, pl, plenrich, plsingapore, tabitha, ulindra, zhexuan
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Physics Plasma Ball lighting up fluorescent tube
Posted by: petersplim
Video duration: 115 seconds
Global video hits: 0
The plasma ball is able to send electrons to and from a person's hand to light up a normal fluorescent tube. The potential difference (p.d.) is high enough.
Related: ball, education, fluorescent, peter, petersplim, physics, pl, plasma, plsingapore, science, tube
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Liquid Nitrogen and the spinning ping pong ball
Posted by: petersplim
Video duration: 89 seconds
Global video hits: 826202
2 holes are punctured at a slanting/glacing angle into a ping pong ball. It is then immersed in liquid nitrogen. The air inside it cools. This lowers the air pressure inside the ping pong ball. Liquid nitrogen then partly fills the ping pong ball. The ping pong ball will start to spin as cold liquid nitrogen boils shooting out cold nitrogen gas from these 2 holes.
Related: ball, liquid, nitrogen, peterlim, ping, pong, spinning
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Liquid nitrogen shrinking a helium filled balloon
Posted by: petersplim
Video duration: 58 seconds
Global video hits: 37662
A helium-filled balloon is less dense than air and it can float upwards. When the balloon is shrunk by pouring liquid nitrogen over it, it becomes denser than air and falls to the ground.
Upon warming and expanding, it will fly up again.This video is produced in Singapore. More videos on www.plenrich.com
Related: balloon, helium, liquid, nitrogen
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