Me fast this is urgent !

1.) in a motor, blank provides the necessary push to make current flow.

a.) electromagnetic energy.

b.) a generator.

c.) mechanical energy.

d.) a battery.

answer for brainliest

To find the mass defect for uranium-238 several calculations must be made. which is the calculation that should be made first? assume atomic number for uranium-238 is 92. a. 92(1.0073) x 92(1.0087) = b. 92(1.0073) x 146(1.0087) = c. 146(1.0073) x 238(1.0087) = d. 238(1.0073) x 238(1.0087) =