A small glider is coasting horizontally when suddenly a very heavy piece of cargo falls out of the bottom of the plane. You can neglect air resistance. Right after the cargo has fallen out, which of the following correctly describes the horizontal speeds of the plane and the cargo? a. The horizontal speed of the plane goes up and that of the cargo goes down.
b. The horizontal speed of the plane goes down and that of the cargo goes up neither the cargo nor the plane change their horizontal speeds.
c. The horizontal speeds of both the plane and the cargo go down.
d. The horizontal speeds of both the plane and the cargo go up

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m