Abeam of electrons, each with the same kinetic energy, illuminates a pair of slits separated by a distance of 52 nm. the beam forms bright and dark fringes on a screen located a distance 1.8 m beyond the two slits. the arrangement is otherwise identical to that used in the optical two-slit interference experiment. the bright fringes are found to be separated by a distance of 1 mm. what is the kinetic energy of the electrons in the beam? planck’s constant is 6.63 × 10−34 j · s. answer in units of kev.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

there are no contact forces mentioned on the list of choices that you've provided.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.