Recent content by j-lee00

What is the cost for 1 hr? Current = 1 A Voltage = 25 000 V Kilowatt hour = £0.10 KWhr

Thanks greg

I would put my working but I am slow in writing latex and my exam is tomorrow, thanks for the help anyway

Do you have the workings?

Homework Statement Question is in the attachment, this is for revision not homework

thanks

Homework Statement In attachment The Attempt at a Solution I can't see the link in the steps, a little help pls.

What you wrote clarified my problem. tks

Are the negative powers of the Laurent expansion only as big as the largest pole?

To convert atomic mass to kg, I do 63.5 x 1.66^10-27 = 1.0541 x 10^-25kg Then 8920 kgm^-3 / 1.0541 x 10^-25kg = 8.462195238 x10^28m^-3 but it should be around 10^9 says wikepedia?

Thanks for your help. With the expansion that you made, how does this differ to the taylor expansion? or it the same?

Homework Statement In attachment The Attempt at a Solution I break into partial fractions, then get stuck. Please help me in layman terms f(z) = -1/3[3(z+1)] + 4/3[z+4] Now I am stuck.

number of electrons per unit volume

How do I work out the charge density of Copper Cu, if atomic mass =63.5 Density = 8920 kgm^-3 Assume 1 electron per cu atom.

yep sure is