Recent content by Cuttlas

:) Yes, it seems your right. Then Does it mean I'm right? The Face chromatic number is 2 or 3?

If It can not be 2, then How I painted the Graph's Faces with only two colors? As you can see Faces in painted graph with different colors is not Adjacent with each other. So it means I did the painting correctly. But I think I'm mistaking. Could u please upload the painted graph which u think...

Why is it 4? Look at image below, the face chromatic number is 2, so it should not be 4. Could u please explain for me how did u get 4?

Hi What is the face chromatic number for the Graph Below? Thank You

In the picture below, the "abcdbea" trail is a dominating trail in the graph. My question is that the "agcdbea" is also a dominating trail or NOT? If not why? Thank you ;)

Hi Are these two graphs EQUAL to each other? Exactly If a Graph contains the left graph in image as a sub-graph then it can not be an edge graph. the question is about the right one, Is it equal with left one? if yes, then does it mean If a Graph contains the right graph in image as a...

Thanks For your helps friends. Now as the last question! While I was researching on this problem I found this: F=-G.Me.m/r*2, you can see a negative sign behind the formula, but mine does not have it. So what is this negative sign for? Is there any differences between (G.Me.m/r*2) and...

My exact question is that what should I write instead of (d*2r/dt*2) in the formula? Really what should I write?

Did you check that PDF? About F=ma, a is (rω2) means acceleration but it is in circular motion, in Elliptic motion I do not know what is it?? I really do not know how to solve this problem, what is (d2r/dt2) exactly? what should do with it? your answers is really short with small details...

Thanks D H But... Newton's law of gravitation= Newton's second law of motion= F=ma If I want to use these then I have: G.Me.m/r*2=m.r.ω*2 But it is for circular motion not Elliptic motion. It is not a homework, It is just a project out of students knowledge and they should...

But How? Can you write it please?

Thanks for your attention D H, I respect it a lot. I think it is something between 1 and 2 ! As I can remember I should only prov the formula and we know it is a elliptical orbit. so maybe introductory physics level. But maybe the target is both, I mean proving the formula and proving that...

I should find this section d2r/dt2, our teacher told you should find the result of d2r/dt2 and then by the formula above find the radius equation. so? P.S: How did you wrote that formula in the mathematics form, I can not find any tool for typing math formulas here!

Hi D H Yes the formula to proof is the one you wrote, and yes this formula is related to a satellite in a elliptical path. so is there anything unclear yet?

Homework Statement Our teacher gave us a formula and ask us to proof it, when I asked him for more detail he told I'm looking for radius equation in this formula. The formula is: G.Me.m/r*2=m.d*2r/dt*2 . means Multiply / means Divide * means Power, r to the power of 2 is r*2 I believe target...