The magnitude of a force, F, between two particles of masses m1 and m2 a distance r apart, varies with m1, m2, and r according to the formula F = C m1 m2 r, where C is a constant. The dimensions of force are [F] = M L/T2, where M stands for mass, L for length, and T for time. What are the dimensions of the constant C?

what are the statements? x

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

small = small current large mag large current

a.   mass number from atomic number