modern physics

[athenaroa]

we find ourselves in a new universe where the rules of relativity still are valid, but aplace in which physical constants may have new values. For instance, in this new universe, a 1 kg mass is now equivalent to 4x10^15 joules. In this new universe, at what approximate speed in M/sec will light travel in a vacuum?

[Doc Al]

I presume they want you to deduce from Einstein's E=mc2, what the new speed of light (c) must be. Give it a try.