8. The pressure, temperature, and volume of a sample gas are P, T, and V, respec
ID: 1291014 • Letter: 8
Question
8. The pressure, temperature, and volume of a sample gas are P, T, and V, respectively. If the volume is doubled and the pressure cut in half, the temperature becomes ___
A) T
B) P/(2V)
C) 2PV
D) 4T
E) T/2
9. A hole of radius 1.0 mm occurs in the bottom of a water storage tank that holds water to a depth of 15 m. At what rate will water flow out of the hole? (Density of water is 1 kg/L, 1 m3 = 1000 L)
A) 5.4 mL/s
B) 54 mL/s
C) 540 mL/s
D) 0.54 mL/s
10. When you blow some air above a paper strip, the paper rises. This is because
A) the air above the paper moves slower and the pressure is higher.
B) the air above the paper moves faster and the pressure is higher.
C) the air above the paper moves faster and the pressure is lower.
D) the air above the paper moves slower and the pressure is lower.
Explanation / Answer
8. The pressure, temperature, and volume of a sample gas are P, T, and V, respectively. If the volume is doubled and the pressure cut in half, the temperature becomes ___
A) T
B) P/(2V)
C) 2PV
D) 4T
E) T/2
Reason
From the relation , P1V1/T1 = P2V2/T2
9. A hole of radius 1.0 mm occurs in the bottom of a water storage tank that holds water to a depth of 15 m. At what rate will water flow out of the hole? (Density of water is 1 kg/L, 1 m3 = 1000 L)
A) 5.4 mL/s
B) 54 mL/s
C) 540 mL/s
D) 0.54 mL/s
Answer:
mgh =1/2 mv^2
v=(2gh)^1/2 =17.15 m/sec
10. When you blow some air above a paper strip, the paper rises. This is because
A) the air above the paper moves slower and the pressure is higher.
B) the air above the paper moves faster and the pressure is higher.
C) the air above the paper moves faster and the pressure is lower.
D) the air above the paper moves slower and the pressure is lower.
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