Note that since xcritical, as computed in the previous part, is not necessarily positive. if xcritical< 0, the bar will be stable no matter where the block of mass m2 is placed on it.

assuming that m1, d, and l are held fixed, what is the maximum block mass mmax for which the bar will always be stable? in other words, what is the maximum block mass such that xcritical? 0?

answer in terms of m1, d, and l.

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:

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