Can a vector with a non zero component be zero?

A vector only has zero magnitude if and only if all its components are 0. Therefore, a vector can have non-zero magnitude if a component is zero.

ill do it for 100, also this isnt 80 its 40

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.