Question

given that E=mc^2, find c if m=0.05 and E=4.5*10^15
(A) 1.5*10^7
(B) 3*10^8
(C) 1.0*10^15
(D) 2*10^16
or none of the above

Answer 1

b

Answer 2

i thought it was none of these can ou tell me how you got b so i know how to work it out?

Answer 3

divide by m on both sides, u get E/m = c^2
E/m is 9 x 10^16
so c is sqrt{9 x 10^16}
c=3 x 10^8

Answer 4

thanks so much

Answer 5

and anyway this c in this particular eqn is a universal constant

Answer 6

what is a universal constant

Answer 7

i mean this is one of the most famous equations of the world, and wherever u c dis eqn, d value of c is always the same

Answer 8

thanks so much you have been a great help

Answer 9

no prob

Answer 10

Errr, what kind of math is this? 0.0
-just stumbled upon this question-

Answer 11

wts ur implication?