For an experiment to study a crystal of NaCl, you are considering using either a beam of photons or a beam of electrons, each with the same wavelength of 0.281 nm, equal to the separation of the Na and Cl ions in the crystal. (8) a) Find the energy of the photons and the kinetic energy of the electrons in the beams. Which beam would you choose

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

When would a bouncy ball have the most potential energy