The earth's magnetic field, like any magnetic field, stores energy. the maximum strength of the earth's field is about 7.0 x 10-5 t. find the maximum magnetic energy stored in the space above a city if the space occupies an area of 4.8 x 108 m2 and has a height of 1500 m.

1.4 x 10^9 J

Explanation:

magnetic field, B = 7 x 10^-5 T

Area, A = 4.8 x 10^8 m^2

height, H = 1500 m

the formula for the energy density is given by

Total energy = Energy density x Volume

U = 1.4 x 10^9 J

Thus, the maximum magnetic energy stored is 1.4 x 10^9 J

carla slowed down in the beginning of her trip, stopped, and then sped up

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: