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.... gold has a heavy atom, so it will rebound the alpha particle rather be knocked around... Did u mean gold's atoms are heavy? rather than be knocked around? what do u mean? with all atoms wouldnt the alpha particles deflect( is this what u mean by rebound?), but it may deflect off...

Why do alpha particles deflect by the thin gold foil?? Why not any material?? I thought the deflection was just because of repulsion of the alpha particle and the nucleus, so the repulsive power should be the same regardless of the material shouldnt it?? The book says its because of...

... Read post above :rolleyes:

... YEAH PLZ :D :D :D :D I HATE CIRCLE GEOMETRY

... I dont know, maybe i should add w= z-1/z ( given) which is what yielded the expressions for u and v in terms of x and y.[so really u should be able to work backwards to see that for urself, right?) if z=0 w is undefined????? Is that right??? "PS Truemathematician is a...

.. HAHA IM NOT DRUNK I knew the answer for the locus was x=0 but we exclude the origin (0,0) why?????????????????? And thanx wogboy, the book didnt include it goes from (0,-2) to (0,2) haha- they missed something, and u missed we exclude the origin.

Given w=u+iv , u = x - x/(x^2+y^2) ,v = y + y/(x^2+y^2) and that x^2 + y^2=1 Find the locus of w PLZ RESPOND QUICKLY!!! haha Thanks

... haha

... okay thanx

... I think u are correct. Can u plz explain to me why they are re-usable? And in the textbook it says the older spacecrafts used 'ablative' material , made of fibreglass also????

HAHA. I think there is an error associated with the reasoning in the textbooks as to why so much heat is generated during re-entry. They say the high heat is due to fast friction with the atmospheric layer and the spacecraft. However i believe most heat is due to compression of the air...

... oh shit. Sorry my mistake. You are right, and i meant to write down what u said, but got tired .... lol btw u make errors too lol I don't think that orbital velocity does not increase with radius as you asserted u meant I don't think that orbital velocity does increase with...

.... And i dont wanna upset ya, but if the test was that cheap, doesn't that mean shit scaling for all of yaz on that assesment. LOLOL

I got it now. Its like this Define the term orbital velocity and the quantitative and qualitative relationship between orbital velocity, the gravitational constant, mass of the central body, mass of the satellite and the radius of the orbit using Kepler's Law of Periods -Orbital velocity...

Define the term orbital velocity and the quantitative and qualitative relationship between orbital velocity, the gravitational constant, mass of the central body, mass of the satellite and the radius of the orbit using Kepler's Law of Periods where does keplers law come in this ? this site...

..... For some reason the 1st ionising energy is the electrons total energy in the stationary state given by E(n)= - ( 2pi k^2 e^4 m)/(h^2 n^2) I got this from the excel - it works out to be 13.6eV but i dont know why or if we are required to know this formula along with the other...

Plz solve this q for me. The combined air and road resistance of a car in motion is proportional to v^2 , where v is its speed. When the engine is disengaged the car moves down an incline making an angle InverseSine(1/30) with the horizontal, with a velocity of 30m/s . Find the force required...

... No u can travel to future but not past(according to relativity). According to some relativity and gravity unification theory u can travel to past and u will think irrationaly(uni work, i heard this from someone)

.. yeah i was hoping for a different answer. I saw this on a site , and was unhappy with this formula cause even i can derive this formula to make c remain fastest speed(in relative velocity too). Seems like an excuse. So i was thinkin of that light effect when u pass light through cesium gas...

Relativity Q A Spacecraft is moving at 0.999c in one direction and another at 0.6c in the other. Does that mean Velocity relative to each other is greater than c ? Thats impossible!