Edexcel PHYSICS Doubts

[astarmathsandphysics]

I don't understand the light bulb question. A 100W turbine would not even power 4 filament light bulbs

[The Golden Girl =D]

I don't get it either =[

[astarmathsandphysics]

Not going mad then

[The Golden Girl =D]

What do you mean ?

[astarmathsandphysics]

I mean the question made so sense. If it made no sense to someone else then, the question makes no sense.

[The Golden Girl =D]

TWO Point charges of + 0.50 micro C and - 0.50 micro C ,from an electric dipole of length 0.12 m

a) Calculate the size of the Force between the charges.

Substituing F = kQ₁Q2/r²

F = [(9*10⁹) * (30*10^-9) * (30*10^-9) ] / [0.25]²

 F = 1.3*10-⁴ N

I don't get how they came up with the values in Red , they aren't in the Question (green)

{ Unit 4 - Electric fields }  I got this Question from a Book.

Thanks Guys =]

[The Golden Girl =D]

^ Anyone ?! 

That's the only Data given by the Question to be honest 

[Romeesa-Chan]

TWO Point charges of + 0.50 micro C and - 0.50 micro C ,from an electric dipole of length 0.12 m

a) Calculate the size of the Force between the charges.

Substituing F = kQ₁Q2/r²

F = [(9*109) * (30*10^-9) * (30*10^-9) ] / [0.25]²

 F = 1.3*10-⁴ N

I don't get how they came up with the values in Red , they aren't in the Question (green)

{ Unit 4 - Electric fields }  I got this Question from a Book.

Thanks Guys =]

Not sure ... it's all messed up. =X

[The Golden Girl =D]

^ Check your Inbox

[Romeesa-Chan]

^ Check your Inbox

I am pretty much useless.

I hope astar can help you out here. (:

[The Golden Girl =D]

Thanks Romeesa =]

Can Anyone help me on this Question please , thanks again =D

[astarmathsandphysics]

Will look now

[astarmathsandphysics]

i Coulomb =10^-6 C so 0.5 micro coulomb =0.5*10^-6 C.
F=9*10^9*(0.5*10^-6)^2/0.12^2 =0.156 N

[astarmathsandphysics]

I don't know how they get the values for the charges. Must be magic.

[The Golden Girl =D]

That means it was a TYPO/printing error. Thanks Sir =]