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:

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

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it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =