Recent content by VanKwisH

so on the left side... could i use sigma notation to verify the range and the addition of the numbers?? and on the right side ... i can see that it's just like 1^3, 1^3 + 2^3 , 2^3 + 3^3 3^3 + 4^3 how would i show this in terms of just using n ? n + (n)^3 ? the problem with this is that it...

Homework Statement consider the following four equations: 1) 1=1 2) 2 + 3 + 4 = 1 + 8 3) 5 + 6 + 7 + 8 + 9 = 8 + 27 4) 10 + 11 + 12 + 13 + 14 + 15 + 16 = 27 + 64 conjecture the general formula suggested by these four equations and prove your conjecture Homework Equations...

hmmm i kinda understand it... but 1 more thing... for the inductive step, do i add k+1 to both sides?? or do i substitute k+1 for k in the right side of the equation? or would i substitute k+1 to the right side and then add k+1 to both sides?? because I've seen all these situations done in my...

Okay i need some help understanding what induction is..I know that for some open statement you must prove thatif the smallest element in the set is true... every element in that universe is true... I know that you use the basis step for the smallest element. and for the induction step you must...

what about this?? \oslash \subseteq {\oslash} would this be true? because from what i know... this is an empty set... and it doesn't contain an element... but it a subset of all sets... so shouldn't this be true?? or would this even be a proper subset?

Hey. um i got a few questions about the empty set... i know for a fact that the empty set is a subset of all any set.. a) but is it an element as well?? b) can it be an element of itself ? c) or even a subset of itself?? example \oslash \in\oslash is this true?? \oslash\subset\oslash...

Homework Statement A +30uc charge is placed 60cm from an identical +30uc charge. how much work would be required to move a +0.2uc test charge from a point midway between them to a point 10 cm close to either of the chargesHomework Equations E = F/Q = KQ / r^2 E= V/D W = PE = V*Q = Kq1q2 / r...

AHHHH ... that made so much more sense thank you ...and i got it :D

hmmmmmm when i do that ... I get the right answer ... but one question ... what happened to the Y part of the formula ? isn't that relevant to the solution as well ? because if u have an Fgy ... wouldn't u need an Fey in order for it so not move??

i don't know ... my physics teacher didn't teach me that

hmmmmmmm the answer says 5.76 x 10^-4 but i get 0.00331 ...... what i did was i found Fex = 0.864 and Fey = 4.9 i used pythagoras to find the whole part of the Fe and E = F / Q so i re-arranged it so that Q = F / E and that's how i got my answer ... what am i doing wrong?

Fex + Fgx = 0 Fex = - Fgx Fey + Fgy = 0 Fey = - Fgy ?

so basically what ur saying is Fg = E ?

Homework Statement A 0.50kg ball is suspended in a uniform electric field ( E = 1500 N/C ) as shown in the diagram ... http://img201.imageshack.us/img201/9771/23vl0.th.png Calculate the charge on the ball Homework Equations The Attempt at a Solution I found fg = -4.9 N...

ok nvm i got it i got 3.457 x 10^5 km