The rest energy E of an object with rest mass m is given by Albert Einstein's famous equation E=mc^2, where c is the speed of light in vacuum. Find E for an electron for which (to three significant figures) m = 9.11 x 10^(-31) kg. The SI unit for E is the joule (J)

A proton (with a rest mass m=1.67×10^−27kg) has total energy that is 4.00 times its rest energy.

a. What is the kinetic energy KE of the proton?

Express your answer in billions of electron volts to three significant figures.

b. What is the magnitude of the momentum p of the proton?

Express your answer in kilogram-meters per second to three significant figures.

c. What is the speed v of the proton?

Express your answer as a fraction of the speed of light to four significant figures.

The speed of light is now defined to be 2.997 924 58 X 108 m/s. Express the speed of light to (a) three significant figures, (b) five significant figures, and (c) seven significant figures.

The speed of light is now defined to be 2.997 924 58 X 10⁸ m/s. Express the speed of light to

(a) three significant figures, (b) five significant figures, and (c) seven significant figures.