1.You are studying gas pressure and you remember that one of the units used to d
ID: 828105 • Letter: 1
Question
1.You are studying gas pressure and you remember that one of the units used to describe gas pressure is pounds per square inch (abbreviated psi). You are a bit of a daredevil and you decide to travel to the center of a hurricane. The weather report says that the air pressure at the center of the hurricane is 943 millibar. Millibar is a unit of gas pressure that we did not discuss in class. HOWEVER, there is approximately 1psi for every 68.95 millibar. What is the air pressure at the center of the hurricane using units of psi?
2. You have just celebrated your birthday at McDonald
Explanation / Answer
1. Given that 1psi=68.95 millibar.
or 1 millibar=1/68.95 psi = 0.0145 psi. ----(A)
The weather report says that the air pressure at the center of the hurricane is 943 millibar.
or 943*0.0145 psi = 13.6735 ----- Unit Conversion using (A)
2. At constant Presure, Volume and Temperature are directly proportional :
Using Charle's Law V1/T1=V2/T2 -----(B)
Let condition 1 is at McD : Therefore V1=1.30L ; T1=23.3
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