Question

Solve E=mc^2 for c?

A) c= E/m
B) c= m/E
C) c= +- square root (m/E)
D) c= +- square root (E/m)

Answer 1

±sqrt(E/m)= c

Explanation:

E=mc^2

Divide each side by m

E/m=m/m c^2

E/m =c^2

Take the square root of each side

±sqrt(E/m)= sqrt(c^2)

±sqrt(E/m)= c