How does a laser printer exploit physical properties covered in this chapter? On the 20th of May, 2019, SI base units were redefined. Rub your hands or feet along various household items to test their...How does a laser printer exploit physical properties covered in this chapter? On the 20th of May, 2019, SI base units were redefined. Rub your hands or feet along various household items to test their electron affinity. After charging your body, research the electron affinity of the surface you used to charge yourself. To try in the lab Propose an experiment to measure the Coulomb’s constant. Propose an experiment to organize various materials based on their electron affinity.