I have noticed just in the past couple of years that I get a red splotchy rash on my neck when I drink beer. I thought it might be an allergic reaction, but it doesn't happen all of the time when I drink beer. I have tried switching to a different kind of beer, but I still have random outbreaks of this rash. Answer.
So, if two objects have the same energy $E_k$, they only have the same momentum if they also have the same mass. Since the bull has a much larger mass than the bullet, it must therefore have a much larger momentum than the bullet to arrive at the same kinetic energy. Force is change of momentum with time, $F = \dot p$.
The atomic mass is expressed in units of atomic mass unit, or amu, and consists primarily of the protons and neutrons in the atom's nucleus, making it closely match the mass number of an atom. When an element has two or more isotopes, the atomic weight is expressed as an interval with an upper and lower number. Both atomic masses and atomic weights are determined by mass spectrometry, a technique where electrically charged particles are separated by their masses.