Upon being struck by 240-nm photons, a metal ejects electrons with a maximum kinetic energy of 1.45 ev. what is the work function of this metal? (a) 3.73 ev (b) 3.13 ev (c) 4.33 ev (d) 4.92 ev

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.

Which graph represents motion with an object with positive velocity that is located at a position of 3 meters at a time of 0 seconds? a) a b) bb eliminate c) c d) d

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped