Hot air has a lower density than the surrounding atmosphere, therefore,it will rise.. The reason it is "cold" in the upper atmosphere is actually because of a lower air density.
Atmospheric pressure is molecular's heavy. So the total number of molecules decreases by going up the surface of the earth. Ok?
Answer:
The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material.
Explanation:
The key idea behind the synthesis, processing and application of alloys consist in combining desire qualities from each mineral component in the form of a material. For example, steel is the combination of iron, which is ductile but prone to rusting in wet environments, and carbon, which offers high hardness and additional resistence to rusting in wet environments, but is fragile. Hence, steel is more resistant to rusting, ductile as iron and more resistant than iron.
Answer:
Explanation:
Given
Density = 3 starts in 10 cubic light years.
Required
Determine the probability of 1 or more in 10 cubic light years
Since the number of stars follow a Poisson distribution, we make use of:
T = the light years
Calculating 
In probability:
Calculating P(X=0)
Substitute 0 for k and the values for 
and T in
Substitute 0.04979 for P(X=0) in
--- approximated
<em>Hence, the required probability is 0.9502</em>
<h2>34.9×46×809</h2><h3>=1605.4×809 </h3><h3>=1298768.6</h3>
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