Help me plss thank you so much ​

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:

educational segregation in the us prior to brown.

the members of the u.s. supreme court that on may 17, 1954, ruled unanimously that racial segregation in public schools is unconstitutional.

judgment and order of the supreme court for the case.

u.s. circuit judges robert a. katzmann, damon j.

the u.s. supreme court's decision in brown v. board of education marked a turning point in the history of race relations in the united states. on may 17, 1954, the court stripped away constitutional sanctions for segregation by race, and made equal opportunity in education the law of the land.