Post by wildoats on Feb 2, 2016 9:47:58 GMT 7
The density of molecules and how that affects transmission through that media.
It's harder to create movement in water than in air, because water molecules are closer together than air molecules.
To show the difference in resistance, physicist Andreas Wahl puts himself in front of a weapon submerged in water
and fires it - on himself.
Physicist Andreas Wahl can be seen standing mere metres from the assault rifle, in a video released online earlier this week.
He pulls the trigger using a piece of string — but despite the loud bang and explosion of bubbles, the bullet only makes
it about two metres before it nosedives, sinking before it reaches Mr Wahl.
Though the video may be nerve-wracking to watch, Dr Karl said the bullet only went a short distance because water,
which weighs much more per cubic metre, provides a lot more resistance than air.
"Air weighs roughly 1.25 kilogram per cubic metre, water [weighs] roughly 1,000 kg [per cubic metre]," he said.
"There are a lot more molecules in the way ... so the bullet has to push really hard to get through the water."
Source
.
Shooting a loaded gun underwater: don't try this at home!
It's harder to create movement in water than in air, because water molecules are closer together than air molecules.
To show the difference in resistance, physicist Andreas Wahl puts himself in front of a weapon submerged in water
and fires it - on himself.
Physicist Andreas Wahl can be seen standing mere metres from the assault rifle, in a video released online earlier this week.
He pulls the trigger using a piece of string — but despite the loud bang and explosion of bubbles, the bullet only makes
it about two metres before it nosedives, sinking before it reaches Mr Wahl.
Though the video may be nerve-wracking to watch, Dr Karl said the bullet only went a short distance because water,
which weighs much more per cubic metre, provides a lot more resistance than air.
"Air weighs roughly 1.25 kilogram per cubic metre, water [weighs] roughly 1,000 kg [per cubic metre]," he said.
"There are a lot more molecules in the way ... so the bullet has to push really hard to get through the water."
Source
.
Shooting a loaded gun underwater: don't try this at home!
