Einstein's energy mass relation

[Hannah1]

Homework Statement

In Einstein's energy mass relation, the unit for the energy released is Joules, this means that the unit for the mass must be

a. g
b. kg
c. it could be either grams or kilograms
d. Newtons

Homework Equations

E = mc²

The Attempt at a Solution

I believe the answer is B. because kg tend to be the standard for equations I've been working on lately.

Am I correct??

 

[CAF123]

Homework Statement

In Einstein's energy mass relation, the unit for the energy released is Joules, this means that the unit for the mass must be

a. g
b. kg
c. it could be either grams or kilograms
d. Newtons

Homework Equations

E = mc²

The Attempt at a Solution

I believe the answer is B. because kg tend to be the standard for equations I've been working on lately.

Am I correct??

What is a Joule in SI units?

 

[Hannah1]

What is a Joule in SI units?

1 J in SI base units is equal to 1 kg·m²/s².

The answer was, in fact, B. kg.