10. An ideal gas is kept in a eylinder with fisxed pressure. The temperst the ga

Question

10. An ideal gas is kept in a eylinder with fisxed pressure. The temperst the gas is decreased from 27 C to 24 C. The volume of the gas (Alecreases by about 1 percent. 30o 27 (B) increases by about 1 percent (C) decreases by about 11 percent. (D) increases by about 11 percent 11. The temperature of an ideal gas increases from 27°C to 327 C. What happens to the average speed of the molecules in the gas? (A)ncrease s by a factor of v2? ½m" ,T (B) Increases by a factor of 2. (C) Increases by a factor of 327/27. (D) Increases by a factor of 327/27. 12. When you apply heat to the bottom of a pot of water, the heat is transferred throughout the water mainly by (4) conduction.(B) convection (C) radiation. (D) al thre equall 23. Bonus: A proton moves in a magnetic field that is constant in time, but varying in space. There are no other forces on the proton. Which of the following statements is true? (A) The speed of the proton increases when it moves into a region of (B) The speed of the proton decreases when it moves into a rejon of of the proton changes, but there is no simple relationship stronger magnetic field. stronger magnetic field. between the speed and the strength of the magnetic field. (D) The speed of the proton is constant. Section A 10 A 14. A 18. D 2 C g A 23 D

Explanation / Answer

T1 = 27oC= 27+273 = 300 K, T2 =327 oC = 327+273 = 600 K,
average speed v = (8RT/pi*M)^0.5
v2/v1 = (T2/T1)^0.5
v2/v1 = (600/300)^0.5
v2/v1 = (2)^0.5
correct option is (A)

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