Question

4. A hand pump is being used to inflate a bicycle tire that has a gauge pressure of 62.0 lb/in². If the pump is a cylinder of length 19.7 in. with a cross-sectional area of 3.00 in.², how far down must the piston be pushed before air will flow into the tire? Assume the temperature is constant. (answer is in inches)

5. A flight attendant wants to change the temperature of the air in the cabin from 18.0°C to 24.1°C without changing the pressure. What fractional change in the number of moles of air in the cabin would be required?

Answer 1

62 b/in rnge Pressuue . Tn ardn that au flous into tu tire A 3 in Prcssine t pump PV nRT Hore nin2 T,- T2 147 10 (19 7x3)(147 62) V, 32 in leyth 9pmy measurcol fom bettom for the volime -32 3-77 in 3 Piston must be pushed dam by 19-7-377 I5.93 in (2) Ti T2 Gey-Lussac's (aw ans ign that PdT So frachonod champe in preuSHe P Tu 24-1 C +(273.15) - 13c-273 15 18'c +273.1S 0.021 k.