Fluency means that a. you speak clearly and well
b. you have fluid emotional responses to situations
c. you have the ability to come up with many ideas
d. you can create linguistic constructs

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

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.

it's a b and