Recent content by UnD

calculate the work done to locate a 150kg satellite into a geostationary orbit. I'm guessing i need to use ep=- GMmG/r but it would be possitive right? the radius will be 35800 km? or 42,245 cause the 35800 is the altitude for the satellite? m and M is mass of Earth and the satellity so...

Hey, i got to do 2 experiements for physics to measure acceleraetion due to gravity, i did free fall experiment, dropping a ball from a certain hieght and measuring time n using the s=ut +.5 a t^2 forumula to get a and i need to graph this but i do not know what the two things i shot plot...

i don't have a textbook, haven't got a textbook from school, i will get one in couple of weekz; COuld you please direct me to what formulas to use. THanks:shy: :cry: :cry: :cry:

1/2 mv^2 = mgh i know that only:cry: :cry: :cry: Umm I know the -Gm=m/r^2 but i don't think it applies to this kind of question. :cry: :cry: :cry: Plz help

Umm i am kind of lost, calculate the work done to location a 150kg satellite into a geostationary orbit. i have not idea how to do it, Please help. Thanks

Oh k, Cool thanks.

Hmm, Chi Meson, How will i perform the experiment? nguyen713, i kind of see what you are getting at, I have forgoten the formula i'll try and look around here.

Cool. Thanks i need to find another that is different. Plz help. thanks

Hey i was wondering i need to perform 2 experients (i can't do the penulum one) using completely different methods to measure the acceleration due to gravity. I thought of the droping different masses and using the ticky tape timer, ? Also where will i be able to find these things for...

Lol sry got stuck on this past quesiton consider z^2 + az+ (1+i)=0 , find the complex number a, given that i is a root of the equation so (x-i) is a factor thing z= -a +_ sqroot a^2 -4 -4i ---------------------------- 2 then let sqroot a^2 -4 - 4I =c+ib lol i...

Lol it's quite easy but these questions r annoying me. The 20th term of an arithmetic series if 131 and sum of the 6th to 10th term inclusive is 235, find sum is the first 20 terms well 131= a + 19 d 5(2a+ 9d) -3(2a+5d)=235 well i just went on and solve simutalneosly and got...

The easiest way is plot points.

x^2 +6x +k=0 has one root (a) where I am (a) =2, If k is real find both roots of the equation and k So i got b+ 2i is the root (b+2i)^2 +6(x+2i) +k=0 and after expanding it out, i have no clue what to do. Please help. THanks

Thanks very much. You are very helpfull. I just made a silly mistake. That i didn't pick up even after i did it again. Thanks very much

Please help with these simple questions just not understanding it properly. Find square root, of -6i let sqroot of -6i= x+ yi then -6i=x^2 - y^2 +2xyi x^2 - y^2 = 0 and 2xy=-6 then xy=-3 x=-3/y and then solve simu.. i got y= 3 and x=-1 y=-3 x=1 so the anser is +_(-1+3i) BUt that...