Why are magnet made from iron has magnetic properties but an iron bar does not have magnetic properties.

Explanation:

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of ... A permanent magnet is an object made ...

Does Iron have magnetic properties?

Iron is ferromagnetic (attracted to magnets), but only within a certain temperature range and other specific conditions. Iron is magnetic in its α form. ... Iron is paramagnetic above this temperature and only weakly attracted to a magnetic field. Magnetic materials consist of atoms with partially-filled electron shells.

divide the right side by the left side

0.024÷1.2=0.02 for example

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.