Nice work on the Superman question and thanks for the Telekinesis sidestep. If I look at it that way I think Superman can be my hero again. [img]smile.gif[/img]
calc:
Let's assume our hero's hands have an area of 300cm^2 each3
(this would equal circles about 20cm in diameter)
let's give him a big hand
A Jumbo has a mass of 300tons
therefore has a weight 3 000 000 N = 3MN
so
A = 0.06 m^2
F = 3*10^6 N
p = F/A
p = 5*10^7 pascal = 500bar (1 bar is common airpressure, 500 bar would be the waterpressure in a dephth of 5000m)
while there are material which can withstand that kind of pressure the Jumbo is probably not made of them (as air pressure drops with height there's not much need for that) and therefore Superman would probably just tear two big holes into the hull
IF he wasn't using his telekinetic powers
As for the hunter and the dog: Gotchya! [img]graemlins/hehe.gif[/img]
You almost had it Azred but then you (like everybody who knows his math and is not afraid to use it) stepped right into the trap.
The answer is easy:
The hunter moves at 1/6 the rate of the dog, so while he covers 1 mile the dog covers 6 miles. That's it
EDIT: Added Superman calc
[ 08-21-2003, 12:43 PM: Message edited by: Faceman ]