Recent content by Sharr-zeor

so v^2 r / G = M? it seems so simple now >.< thanks for the help, i guess i need to just go through it step by step instead of rushing to an answer :)

leaving it symbolic i get (v^2 / r) r^2 / G = M ? would that work out as v^2 r / G = M v [squared] r [divided by] G [equals] M

well i only need the equation to work out the answer to my coursework question. I've taken the steps to find the necessary equation, i just can't rearrange it. i didntunderstand the second part of your reply. i don't know if I am multiplying or dividing anything oooh, if i multiply 1.35...

i fail miserably at rearranging equations. how would i rearrange GM/r^2 = v^2/r to make M the subject? this is to do with centripetal force, and the mass of a planet a space probe is orbiting after working out the answer to v^2/r (which is 1.35ms^-2) I am left with GM/r^2 = 1.35ms^-2 i wasnt...

A diffraction grating is labelled 300 lines mm^-1 (lines per mm) Show that the spacing (d) between the lines on the grating is 3.3 x 10^-6m i can't really think of any relevant equations. but I'm assuming standard form. i can't believe that the answer would be as simple as converting to...