A mass of 4.00 kilograms is completely converted into energy. What is this amount of energy in joules? (1 J = 1 kg m2/s2) (Points : 3)
1.20 x 10^9 J
1.33 x 10^-8 J
3.60 x 10^17 J
4.4 x 10^-16 J

Question

A mass of 4.00 kilograms is completely converted into energy. What is this amount of energy in joules? (1 J = 1 kg m2/s2) (Points : 3)
       1.20 x 10^9 J
       1.33 x 10^-8 J 
       3.60 x 10^17 J
       4.4 x 10^-16 J

anonymous · Answer

Is it the last one?

anonymous · Answer

can you show your work please i know you have to use E=mc^2 i just am having trouble

anonymous · Answer

@RANE

rane · Answer

ok whts c ?

rane · Answer

use your formula sheet

anonymous · Answer

Thats what i need help with and my teacher never gave me one

anonymous · Answer

Im having a hard time with my teacher no one understands her

rane · Answer

ok w8

rane · Answer

ok c =  3.7 × 10–14 J 
and that is the speed of light

rane · Answer

so since u have both m and c 
u can find e

anonymous · Answer

where are you getting 3.7 x 10-^14?

rane · Answer

u can find it from internet, 
thats the speed of light, u can find it anywhere or ask anyone

anonymous · Answer

Ohh okay

anonymous · Answer

so now whats the next step

anonymous · Answer

Find E?

rane · Answer

yes 
E = MC^2 
  = (4)(3.7 x 10-^14)^2 
  =  now just calculate

anonymous · Answer

so 4 * 3.7 is 14.8

anonymous · Answer

and then... how do you muliply 4 by 10^-14?

rane · Answer

i don't have the calculator with me right now

wht did u get on your calculator ?

anonymous · Answer

Its not working in my calculator it keeps saying error :/ ughhh

rane · Answer

ok w8

anonymous · Answer

it says 5.476 E 29 when i dont put the (-) on the exponent (14)

rane · Answer

ok i did and i got    4.4 x 10^-16 J

anonymous · Answer

Okay just so i know how did you do it? lol

anonymous · Answer

Like calculate this (4)(3.7 x 10-^14)^2

anonymous · Answer

?

rane · Answer

yes

rane · Answer

anonymous · Answer

Ugh lol im soooo confused haha how?

rane · Answer

ok just use value of c 

c =3*10^8

anonymous · Answer

Hmmm.. soo E = m(3*10^8)^2

anonymous · Answer

@RANE :(

rane · Answer

yessssss

anonymous · Answer

@Redenbacher1 did u get ur answer or need a help??? :)

rane · Answer

just insert the value of c and the mass in the formula 
     E = mc^2

anonymous · Answer

@sarah786 and @RANE so its 3.60 x 10^17 J??

rane · Answer

yes thats is the answer

anonymous · Answer

yh u r right :)