<span>The answer is Due to heating of the air by the engine exhaust. Contrails are formed when the hot exhaust of the plane engines is rapidly cooled by the cold air in the upper atmosphere. The water vapor in the engine exhaust, formed in the combustion of fuel, freezes immediately to ice crystals due to the low pressure and -36oC temperatures in the 8000 m altitude in which the planes cruise. </span>
For 2,000 mice living in a field, the per capita growth rate is mathematically given as
NT=0.4
<h3>What is the per capita growth rate (rmax) of mice over a month?</h3>
Generally, the birth and death rate is mathematically given as
BT=1000/2000
BT=0.5
Where
DT=200/2000
DT=0.1
In conclusion, per capita growth rate
NT=0.5-0.1
NT=0.4
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False. Sometimes pushing yourself can help your mind to tell itself "I can do this!" Besides, sometimes pain is a great motivator!
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