Atomic rockets and other cool stuff

[captainjack23]

Velour tops and flared trousers, anyone?

Waiter ? I'll have what he's having, with a side of hot miniskirts and recently torn mens shirts !

 

[captainjack23]

Swimsuits for our current setting ...

[Guess why we left that cold desert world behind and moved to a nice
warm water world. :wink: ]

Now that's a German for you: Why put on a coat, when you can take over a whole new planet ? :mrgreen:

 

[Gaidheal]

Radius and you do indeed need a very wide cylinder or a very fast spin (or moderately high on both) to get a centripetal reaction giving apparent gravity approaching anything like Earth standard gravity.

 

[grymlocke]

I tried to see how small a radius I needed to achieve a reasonable g but the rotational speed was.... :shock:

http://www.artificial-gravity.com/sw/SpinCalc/SpinCalc.htm

woo-hoo..
894m radius @ 1 RPM with a tangenial velocity of 337 kph gives 1g....

 

[lastbesthope]

Radius and you do indeed need a very wide cylinder or a very fast spin (or moderately high on both) to get a centripetal reaction giving apparent gravity approaching anything like Earth standard gravity.

F=mv^2/r, basic high school physics, for those that don't know the equations.

LBH

 

[rust]

F=mv^2/r, basic high school physics, for those that don't know the equations.

I always have problems with the British mathematical notation ...

What does that ^ mean again ? - Thank you.

 

[GypsyComet]

F=mv^2/r, basic high school physics, for those that don't know the equations.

I always have problems with the British mathematical notation ...

What does that ^ mean again ? - Thank you.

Its the method for showing an exponent when your available typeface doesn't do superscripts. v^2 is "v squared".

It's more of a computer programming thing, at least originally.

 

[rust]

Thank you very much.

 

[lastbesthope]

F=mv^2/r, basic high school physics, for those that don't know the equations.

I always have problems with the British mathematical notation ...

What does that ^ mean again ? - Thank you.

Its the method for showing an exponent when your available typeface doesn't do superscripts. v^2 is "v squared".

It's more of a computer programming thing, at least originally.

I don't think it's particularly a British thing, as Gypsy Comet says, it's a limited typeface thing :lol:

It's also a quick way to do it in Excel formulas.

LBH

 

[rust]

I don't think it's particularly a British thing, as Gypsy Comet says, it's a limited typeface thing :lol:

This may well be, I just never encountered it over here. :lol:

 

[BP]

Yep - its a programmer thing - and I've always wondered if mathematicians get it...

Then again in many programming languages we use statements like: x = x + 1 (rather absurd from a mathematicians point of view) :shock:

When posting, I try to remember to spell such things out (i.e. mass squared) and use multiplication signs ('x'), but it is hard to break the ingrained habits of one's profession...