Neon discharge tubes emit a light with a wavelength of 600. nm that appears deep orange to the human eye. how many photons of this electromagnetic radiation amount to 250. j of energy?

Explanation:

The energy of a photon of wavelength is given by

where

is the Planck constant

is the speed of light

In this problem, the wavelength of the photon is

So the energy of one photon with this wavelength is

In order to have a total energy of E = 250 J in this radiation, we have to divide this value by the energy of a single photon, so we find the number of photons that we need:

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.