Many different types of devices, such as flashlights, cell phones, hearing aids, and watches, are powered by batteries. These batteries are sources of chemical energy. Which statement best explains why batteries are used to power these devices? A.
batteries enable devices to use chemical energy directly
B.
batteries convert chemical energy into electrical energy
C.
batteries amplify the chemical energy they provide
D.
batteries reduce the energy demand of powered devices

close lines strong magnet less close weaker

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.

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