#15) Homer Simpson is asleep at the Springfield Nuclear Power Plant (where he's known to occasionally work.. although mostly he's asleep at the controls). When the power plant sounds an alarm (doh!),
what is happening, and what must Homer do to save the day?

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

pe = weightxheight = 2000x1000=2,000,000joules