Recent content by gregmead

I saw a demo lecture where the professor was showing us a laser listening device he'd built - he shone the laser at the clock at the back of the lecture hall and you could hear the mechanism ticking amplified through the device. I'm pretty sure he built it himself

cool :D - well at least I learned something new staying up this late revising...

I still think its something to do with the number of days in the year...

I'd think it was something to do with the number of days in the year that they believed was correct at the time. Also it is easy to divide it up I guess... I'm not too good on the history of science...

Something like, x/y could be done like: (where x and y are numbers) [Int(x/y)] Then the remainder is: [y*Frac(x/y)] That'll be pretty much instant (if you want to do it on a computer or something) If you want to do it with a calculator then just do: x/y but disregard the...

Pervect why not put the camera inside the car filming out the side window looking at equally spaced markes at the side of the straight road ? Then there would be no paralax error from filming at an angle outside the car. Then plot the time it takes to travel between each marker, you could...

oh yea how could I have been so stupid your right of course... oops

yea I think I will have to introduce a small randomising factor in there, which I assume will allow all the balls (even the final one) to go in this is going to be faily hard to complete... thanks for the info :)

so is there any basis to this theory ? because not everything that propegates through space actually has kinetic energy

ok, well I haven't really studied QM for long enough yet, but I think that there is a smallest distance an object can move - maybe it isn't planks length...I can't remember, but it would need space to be quantised which I don't know if it is... I guess we need one of those crazy theoretical...

isnt the smallest length Planks length and the smallest interval of time Planks Time ? so wouldn't the lowest speed somethingthat can move (in an inertial frame) be Speed = Planks Length/Planks Time I know this probably wouldn't work at all due to uncertainty etc and is probably...

hmmmmmmm... yea I think I'm gunna have to simplify this a bit :-S I am talking about potting all the balls off the break, which I think might be possible assuming there is no upper limit to the speed you can hit the ball, because couldn't they just all bounce around until they go in ? Greg

yes it is true, because the velocity (of anything moving in 2D) is a vector with components sideways and upwards (x and y axes). the bullet if it has been fired perfectly level will start off with zero velocity in the y-axis, which is the same velocity that a bullet you just drop from the...

well I guess if you want to do a specific problem you'd have to work out how many pieces the grenade is going to split up into and then somehow prove that they are all receding from one another... assuming it is a spherical scattering it should be fairly easy...

hmmm, yea I think I'll assume that the balls wouldn't deform at all on impact (or explode), and just assume that its a superhuman that's hitting the cue ball. The ball will stop eventually because of friction, but I want it to only pot all of the balls of the player taking the shot, so...