how many kilograms of coal would be required to supply the energy needs for the United States of America for one year?

Question

1.6 x 10⁹ j 1 kilogram of coal

 

1 x 10²⁰ joules u.s. energy consumption

Answer 1

Divide the yearly energy consumption of America by the energy output of 1 kg of coal.

 

(1 x 10²⁰ J) / (1.6 x 10⁹ J/kg) = 6.25 x 10¹⁰ kg of coal