Based on The Riddle of the Rosetta Stone, which statement best describes the role Jean-François Champollion’s brother played during difficult times in his studies? He assisted Jean-François in his research and moved so he could live closer to him.
He encouraged Jean-François to pursue other interests and offered him new ideas.
He continued to support Jean-François and offered financial assistance at times.
He remained unsupportive of Jean-François and criticized his research findings.

idk

explanation:

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and your question what topic are you in trouble with?

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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