America uses 60 Hertz (Hz) Alternating Current (AC). Most smaller devices operate on 120 volt current.
electricity and batteries
That would be electricity.
Depends, Some use Fossil fuels and some use electricity
They use technology to make biofuel.
Various engineering fields will use them. Electricity and electronics.
a boat
Doesn't really matter what kind of energy source you use, water isn't an efficient media to transmit electricity through.
Electricity, Hence the name "electric car"...
No one knows as yet, do they? But we sure as hell use it.
dielectric grease
Alternate Current is one kind of electricity.
B. Hydroelectric generation