An atomic nucleus with a rest mass energy of 7134 mev is accelerated to 99.217% the speed of light relative to the lab frame. what is the kinetic energy in mev of the atomic nucleus in the lab frame? assume 4 significant figures.

4.999 × 10⁴ MeV

Explanation:

Kinetic energy is related to the rest energy by the Lorentz transformation equation as shown below.

Kinetic energy in the lab frame K= ( γ -1 ) Eo

The Lorentz constant γ =

So γ =  = 8.0067

⇒ K = (8.0067-1)(7134) = 49986 MeV

                                       =49,999 MeV ( 4 significant figures)

it about 600 mph from what i calculated

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .