
Stanton D. answered 11/25/20
Tutor to Pique Your Sciences Interest
Hi Reina S.,
The equivalence of mass and energy has been accepted since Einstein to be:
E = m*c^2 .
So plug in, taking care to not mangle your units.
For the second part, take that energy into kinetic energy, as (1/2)mv^2 . If the velocity is going to be close to (>0.1 of, say) that of light, then you would need to do an alternate calculation to get it right, since the apparent mass of an object goes up as it approaches the speed of light.
If this conversion to energy seems overwhelming, think how threatened an anti-hero (made of anti-matter) might feel in a novel!
-- Cheers, -- Mr. d.