The tires of the landing gear of commercial passenger airplanes generally operate at high pressure of 200 psi (pounds per square inch, lb/in2). How many times is 200 psi compared to atmospheric air pressure at sea level (atm)? 1 N = 0.225 lb; 1 in = 2.54 cm; atmospheric air pressure at sea level 1 atm = 101.3 kPa; 1 kPa = 1000 N/m². 

a. 200 psi = 0.14 atm

b. 200 psi = 0.35 atm 

c. 200 psi = 0.69 atm 

d. 200 psi = 13.6 atm 

e. 200 psi = 34.5 atm

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