Read this dictionary entry. discharge /dis-ˈchärj/
noun
the act of unloading something or someone
flowing or emitting something
the process of converting chemical energy into electrical energy
verb
to inform someone that they may or must leave

Based on the dictionary entry, which sentence most accurately uses definition 1 of the noun form of discharge?

A.
The company wanted more workers in the field to help with the freight discharge.
B.
The city wanted to control the discharge of water due to some construction work.
C.
The teacher wanted to discharge a student from the class because he was talking constantly.
D.
The discharge from the batteries was enough to keep the lights on throughout the night.

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: