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a The Expert TAIHuman-1 x C Secure /common/TakeTu alAssignment aspx Home I Student: a Tpitted Management Help work Begin Date 59:00 PM Due Date: 8/2017 59:00 PM End Date: 9/20 59:00 PM 14%) Problem 2 Two conducting spheres with charges 37 nC and -28 nC are initially kept at a distance r. In that position they interact with a lorce F. Then, bey are brougbl in contacl and separaled again until they have again a nutual distance r, In the new positioo, bey interact with a force Assignment Status Click here for 50% Part (a) Is the forec F attractive or pulsive? detailed G 4 50% Part (b) Find the ratio of the force magnitades, FMF. le Summary IF MM Problem Polantial 100% 1 Completed sino coso lano 7 8 9 Submissi 2 Partial Attempts remaining: cotan0 asin acos0 3 Com pleted pe attempt atano acotan0 sinho 1 2 3 5 Completed cosh0 tanh0 cotanho Degree Radians Partial 7 Partial Feedback 5% dedaelkoa pat teedback. Hints My Ac Log O 9:05 PM

Explanation / Answer

Q1 = charge on first sphere = 37 nC

Q2 = charge on second sphere = - 28 nC

Q = change on each sphere after touching

Q = (Q1 + Q2)/2 = (37 - 28)/2 = 4.5 nC

a)

after touching , the charge on each sphere has same polarity. hence the F' is repelsive

b)

F = k Q1 Q2/r2

F' = k Q2 /r2

Ratio is given as

Ratio : F'/F = (k Q2 /r2) /(k Q1 Q2/r2)

F'/F = (4.5)2 /(37 x 28) = 0.0195

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