The total annual energy consumption in the U. S.A. is 1.00 x 1020 joules. If you were capable of converting mass to energy with 100% efficiency, how much mass, in kg, would you need to produce an energy E = 1 x 1020 joules?

A) 1.11 x 104 kg
B) 3.00 x 1028 kg
C) 3.33 x 1011 kg
D) 9.00 x 1036 kg

See answer below

Explanation:

Hi there,

To get started, use the famous equation that purely relates energy and mass,

 where c is the speed of light, a constant: 2.99792458 m/s

and m is mass in kilograms. Note, majority of physics equations only work if in SI units, though there are exceptions.

Since we are asked for mass, solve for m:

So, option A is correct. However, I believe you have a typo in Option A as it should be x10^3 not x10^4, or a typo somewhere else in the x10 powers.

Thanks,

b) 10 minutes

girls stopped for 10 minutes.

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation: