Answer how does adding an iron bar to a solenoid affect the magnetic field of the electromagnet? it changes the magnetic field to a current. it changes the magnetic field’s direction. it increases the magnetic field’s strength. it decreases the magnetic field’s strength.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide