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uh, have an assessment task on thursday. so...i need to identify some of the problems which Fermi and his team needed to consider before beuilding the first nuclear reactor. i'm sure the answer is easy as, but i'm not really sure what i'm looking for and plus i'm a dumb-ass. thanks guys.

sorry timmy. and cheers guys for all the help.

alright, in respect to magnetic levitation, can anybody answer the following for me: explain how superconductors are used to produce the large magnetic fields needed for this operation (i.e. magnetic levitation). Does the answer incorporate eddy currents and induced magnetic fields and...

uh, have a giant assessment task. can someone link me to some info on : how a photocell can be used in light meters and 'electric eyes' in burglar alarms and door openers. all the notes/summaries on this site just say examples of photocells are light meters and 'electric eyes' but don't...

how about north sydney girls don't do any physical activities ever? from sarah