Which scenario is the best example of a deus ex machina?
O
A. A star soccer player finds that she's suddenly second-best when a
boastful new player joins the team.
O
B. An engineer trying to escape an island full of dinosaurs uses her
skills to repair a broken helicopter.
O
C. A spelling bee champion tries to spell a word he's never seen
before, and he loses the competition.
O
D. A doctor can't find a cure for one of her patients, but a wizard
comes by and heals the patient.
U

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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: