Everyone loves watching a good news anchor fail or someone coming short off a skateboard, although in this example I’m willing to bet everyone wished Andreas Wahl the best of luck with his experiment.
Wahl is a physicist who was determined to make his point in rather dramatic fashion, illustrating how the intense resistance in water will slow even a bullet. Here’s the science behind the slowing down of the bullet and the cloud of bubbles from the Daily Mail:
Traveling through water, a bullet will barely hit 2 meters, which is because water is 800 times denser than air.
In the front of the bullet there is an area of high pressure and behind it is low pressure, and in between is a vacuum of water that boils to create a small tiny cloud of gas…there is an area of low pressure and the water around pushes in onto the area…
The momentum of this happening squeezes the gas tighter and tighter until the gas becomes so pressurized that it explodes out again.
‘This osculates backwards and forwards, until all of the bubbles start getting smaller and smaller and disappear completely.
Still, not an experiment you would recommend anyone tries at home.
[source:dailymail]
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