Which statement correctly describes magnetism? (2 points) metals can become magnetic if they have many spinning electrons that create magnetic fields. metals are magnets because they have more electrons than non-magnetic materials. non-paired electrons spin in opposite directions creating an imbalance that creates a magnetic field. the electrons in some metals pair up to create a magnetic field.

Metals can become magnetic if they have many spinning electrons that create magnetic fields.

Explanation:

When metals are placed in external magnetic field then due to this external magnetic field the spinning electrons will experience torque on them and all the electrons aligns in such a way that the magnetic field produced due to spinning electrons are all in the same direction and they all combine to give a strong field due to all spinning electrons

This phenomenon of magnetic field production of electrons due to alignment of all spinning electrons is known as magnetism.

So here correct answer will be

Metals can become magnetic if they have many spinning electrons that create magnetic fields.

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.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more