Recent content by me_and_you

Homework Statement Find all the values for which the series (where n=1 to infinity) \sum((2x-3)/5)^n converges. For these values of x, write the sum of the series as a function of x in simplified form. Please Please help!

I know that an electric field is a region that surrounds a charged particle and exerts a force on the particle, but I don't know how to determine an electric field.

F1= (9x109)(70 x 10-6)(48x10-6)/ .352 this equals: 246.86 F3= (9x109)(-80 x 10-6)(48x10-6)/ .352 this equals: -282.1 Then i did (246.862)+ (-282.12)= Q2 Q= 374C but according to my teacher this is wrong... can you tell me what it is that I am doing wrong?

I thought that's what I was doing but after trying again i got the same wrong answer, I'm so confused about wht i should do with this problem!

Homework Statement Particles of charge +70, +48, and -80 \muC are placed in a line, in the previous order. The center one is .35 m from each of the others. Calculate the net force on each charge due to the other two. Homework Equations F=kq1q2/ d2 The Attempt at a Solution I...

Kinetic Energy and cars... Please help Homework Statement One car has twice the mass of a second car, but only half as much kinetic Energy. When both cars increase their speed by 6.0 m/s, they then ave the same kinetic energy. What were the original speeds of the two cars. Homework...