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

electromagnetic waves travel through space with vacuums. give me brainliest if right.

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.