Abullet with a mass of 0.00658 kg is fired through a 1.95 kg block of wood on a frictionless surface. the initial speed of the bullet is 822 m/s, and the speed of the bullet after it exits the block is 439 m/s. at what speed does the block move after the bullet passes through it?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.