An expensive vacuum system can achieve a pressure as low as 1.53 ✕ 10−7 N/m2 at 26°C. How many atoms are there in a cubic centimeter at this pressure and temperature?

The  value is  

Explanation:

From the question we are told that

    The pressure is  

    The  temperature is  

     The volume is  1 cubic cm =

Generally according to the ideal gas law we have that

here  k is the Boltzmann constant with a value  

  =>  

=>    

=>    

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.