Erromagnetic materials areâ ¦ The number of field lines that determine magnetic field strength A group of metals that have very prominent magnetic properties A group of metals that have no magnetic properties surfaces like plastic or wood

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.

i would say the answer is food.

hope this !

see earlier answer

more than, less

less than, more