# Search results

1. ### Solving 2 inequalities with imaginary numbers?

I have 2 equations, imaginary ones, and 2 unknowns....trying to solve for them..but the answer i got, works with one, but not the other: i*Z1 - i*Z2 = -2 - i Z1 + 3i*Z2 = 4 + 7i where i is the imaginary number, and Z1 and Z2 are the 2 unknowns the answer i got: Z1 : 1.33333 +...
2. ### Planar graphs with minimum degree

ok, here is the question: Let G be a graph with minimal degree \delta(G) = 5, but suppose there exists only one vertex v\in V_{G} such that d(v) = \delta(G). Prove that G is not planar. ok, i can do this visually. if i draw the vertex v and its edges to its points, and then draw points...
3. ### Strong primality test ?

strong primality test ... ?? ok, bear with me ... we learned weak primality tests (given n and base a,::: a^(n-1) mod n ::: if it does not equal 1, then its composite, if it equals 1, then MAYBE prime) ... then we learned strong primes .... think of n-1 = m2^k when m is odd. test ::: a^m...
4. ### Graph theory: quick question(s)

what's the difference between a subgraph and an induced subgraph? looking here: http://mathworld.wolfram.com/InducedSubgraph.html how is the figure K8 ? isn't that K10 ?? also, what is a spanning subgraph?
5. ### Clock/modular arithmetic anyone?

anyone familiar with this, along with some RSA and calculating large powers with modular arithmetic (im lost at the name of it currently). i have attached the test that I took last week ... he allows us to take home the exact same test home, and do it again, and he combines the grades ...
6. ### Positron in a magnetic field help

some more basic homework help!! can you guys point me in the right direction, where to start? (grrr, so freakin lost in this class) 11. A 22.5-eV positron (positively charged electron) is projected into a uniform magnetic field B = 455[mu]T with its velocity vector making an angle of 65.5...
7. ### How much

how much .... seriously, how much bandwidth is used up every month? is it possible to allocate some of that bandwidth elsewhere? ie...PF.com and a member has his own website with xxx bandwidth each month. the member hardly uses any of his bandwidth, and maybe could somehow "donate"...
8. ### What is the difference between the potential difference, and its emf?

ok, i guess i didnt see this forum ... i posted in another forum my question: https://www.physicsforums.com/showthread.php?s=&threadid=7593 ok, im taking engineering physics II ... unfortunately, im forced to take this as part of my COMPUTER SCIENCE degree ... (why i have no idea..stupid...
9. ### Whats the difference?

ok, im taking engineering physics II ... unfortunately, im forced to take this as part of my COMPUTER SCIENCE degree ... (why i have no idea..stupid, as i dont really care how many newtons of force it takes me to push a key on the keyboard, and how much current it takes to go from the keyboard...