Things you always wanted to know the answer to [Vol. 4]
Discussion
Pericoloso said:
Clockwork Cupcake said:
Rostfritt said:
Something I have been wondering for a while, why do most three-door hatchbacks have fixed rear windows? It can be pretty claustrophobic in the back and you can't even pop them out on most cars.
Older cars did have pop open windows. The trouble with them is that rear sear passengers pop them open without warning (which used to scare the s
t out of me as a driver, as the sudden noise made me jump) and then would forget to close them again afterwards, which was a) bloody annoying, b) a security risk, and c) also a problem if it rained. one gets broken and no one has them in stock.
They weren't very good.
mike74 said:
I doubt there's a simple answer to this but how does a rocket engine work in the vacuum of space?
If there's no atmosphere for it to ''push against'' how it able accelerate, decelerate or otherwise manoeuvre a space vehicle?
Newtons third law. Just as the impellor of a jet ski works by throwing mass out of its rear end, a rocket focuses tge energy of an explosion in a focussed direction.If there's no atmosphere for it to ''push against'' how it able accelerate, decelerate or otherwise manoeuvre a space vehicle?
If you were in space and threw a ball in one direction, you'd move in the opposite direction. If the ball exploded and you caught the explosion in a parabola, it would push you away. Or destroy you.
glazbagun said:
Newtons third law. Just as the impellor of a jet ski works by throwing mass out of its rear end, a rocket focuses tge energy of an explosion in a focussed direction.
Kind of. The ejection of mass is the reaction (called the reaction mass), and the movement is the resulting action. The reason it moves in one direction is that all other forces are in equilibrium. 
See https://howthingsfly.si.edu/propulsion/rocket-prop...
See also
https://en.wikipedia.org/wiki/Working_mass
https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_e...
Is iit physically possible to inhale two lungfulls of water, chill for a bit, then exhale the whole lot and start breating air again without outside assistance?
I'm guessing not because of:
reflexive coughing
lung surface being coated with water, reducing available surface area for breathing.
But could the first be countered by training?
I'm guessing not because of:
reflexive coughing
lung surface being coated with water, reducing available surface area for breathing.
But could the first be countered by training?
glazbagun said:
Is iit physically possible to inhale two lungfulls of water, chill for a bit, then exhale the whole lot and start breating air again without outside assistance?
I'm guessing not because of:
reflexive coughing
lung surface being coated with water, reducing available surface area for breathing.
But could the first be countered by training?
Not water, but a special fluid that has been designed for deep diving, it is possible with training and proper controlled application.I'm guessing not because of:
reflexive coughing
lung surface being coated with water, reducing available surface area for breathing.
But could the first be countered by training?
https://en.wikipedia.org/wiki/Liquid_breathing
ruggedscotty said:
glazbagun said:
Is iit physically possible to inhale two lungfulls of water, chill for a bit, then exhale the whole lot and start breating air again without outside assistance?
I'm guessing not because of:
reflexive coughing
lung surface being coated with water, reducing available surface area for breathing.
But could the first be countered by training?
Not water, but a special fluid that has been designed for deep diving, it is possible with training and proper controlled application.I'm guessing not because of:
reflexive coughing
lung surface being coated with water, reducing available surface area for breathing.
But could the first be countered by training?
https://en.wikipedia.org/wiki/Liquid_breathing
Two more: The Abyss
Cliftonite said:
RizzoTheRat said:
Clockwork Cupcake said:
One further: fiction 
However the scene in The Abyss with the rat breathing the fluid was apparently a real rat breathing real fluidglazbagun said:
Yeah the rat breathing that fluid always struck me as a much harder camera trick than the man in the suit... till I read that they did it!
I wonder if the smaller volume of a rats lung allowsbit to circulate the fluid faster, or if it just burns less oxygen for its given lung area.
Maybe, I don't know. I did read that rats weren't the only animals to survive liquid breathing. A scientist tried it, apparently he survived.I wonder if the smaller volume of a rats lung allowsbit to circulate the fluid faster, or if it just burns less oxygen for its given lung area.
popeyewhite said:
glazbagun said:
Yeah the rat breathing that fluid always struck me as a much harder camera trick than the man in the suit... till I read that they did it!
I wonder if the smaller volume of a rats lung allowsbit to circulate the fluid faster, or if it just burns less oxygen for its given lung area.
Maybe, I don't know. I did read that rats weren't the only animals to survive liquid breathing. A scientist tried it, apparently he survived.I wonder if the smaller volume of a rats lung allowsbit to circulate the fluid faster, or if it just burns less oxygen for its given lung area.
steveo3002 said:
Roofless Toothless said:
Why are caravans always white?
best colour for hiding wobbles /dings /dents etc...if they were gloss black they would either cost alot more or look all wobbly and crapI think only offering in one colour saves on the options list and avoids the 'will it clash with the car?' Question.
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