An electron and a proton are fixed at a separation distance of 855 nm. Find the magnitude E and the direction of the electric field at their midpoint.

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

In the 1980's, congress authorized the u.s. department of energy to build the wipp facility in the chicuahuan desert in new mexico. what is the purpose of wipp?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?