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Q. 25

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 511

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Short Answer

The solar corona is a very hot atmosphere surrounding the visible surface of the sun. X-ray emissions from the corona show that its temperature is about . The gas pressure in the corona is about . Estimate the number density of particles in the solar corona.

The number density of particles in the solar corona is .

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Step by Step Solution

Step 1 : Given information and Formula used 

Given : Temperature of X-ray emissions :

The gas pressure is :

Theory used :
Number density is given by The ideal gas law is given by we'll rewrite the equation of Ideal Gas Law for in the form

Step 2 : Finding the number density

If we know the number of molecules , we obtain the number of moles by taking Avogadro's number

Now put the expressions for in number density equation we get: Now we put the values for into this equation to get the number density

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