$(10$ pts$)($a$)$ Calculate the de Broglie wavelength, $=\frac{h}{p},$ for an electron with kinetic energy of

$50eV.($b$)$ A $2000kg$ truck traveling at $10\frac{m}{s},($c$)$ a photon with energy $50eV.$

$(10$ pts$)($a$)$ For an electron de Broglie wavelength $=85,$ determine the electron energy $($eV$),$

momentum, and velocity. $($b$)$ An electron is moving with a velocity of $8{10}^3\frac{m}{s}.$ Determine

the electron energy $(eV),$ momentum, and de Broglie wavelength $($in $).$