Showing 41 to 50 of 465 Questions
  • A 4.00-L sample of a diatomic ideal gas with specific heat ratio 1.40, confined to a cylinder, is carried through a closed cycle. The gas is initially at 1.00 atm and at 300 K. First, its pressure is tripled under constant volume. Then, it expands adiabatically to its original pressure. Finally, the gas is compressed isobarically to it

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    479
  • A 5.00-L vessel contains nitrogen gas at 27.0°C and a pressure of 3.00 atm. Find (a) The total translational kinetic energy of the gas molecules and (b) The average kinetic energy per molecule.

    3
    271
  • A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 55o with the normal to the wall. Each molecule in the beam has a speed of 1.0 km/s and a mass of 3.3 x 10-24 g. The beam strikes the wall over an area of.2.0cm2, at the rate of 1023 molecules per second. What is the beam's pressure on the wall?

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    240
  • A brass lid screws tightly onto a glass jar at 20oC. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperatures of the lid and the jar are both 60oC. The inside diameter of the lid is 8.0cm at 20oC. Find the size of the gap (difference in radius) that develops by this procedure.

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    277
  • A brass rod has a circular cross-section of radius 5.00 cm. The rod fits into a circular hole in a copper sheet with a clearance of 0.010 mm completely around it when both the rod and the sheet are at 20 °C. (a) At what temperature will the clearance be zero? (b) Would such a tight fit be possible if the sheet were brass and the rod we

    0
    1
  • A certain gas occupies a volume of 4.3 L at a pressure of 1.2 atm and a temperature of 310 K. It is compressed adiabatically to a volume of 0.76 L. Determine (a) The final pressure and (b) The final temperature, assuming the gas to be an ideal gas for which γ = 1.4.

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    266
  • A certain molecule has f degrees of freedom. Show that an ideal gas consisting of such molecules has the following properties: (1) its total internal energy is fnRT / 2; (2) its molar specific heat at constant volume is fR / 2; (3) its molar specific heat at constant pressure is (f + 2) R /2; (4) its specific heat ratio is y = CP/CV = (f

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    229
  • A certain ski wax is rated for use between –12 and –7oC. What is this temperature range on the Fahrenheit scale?

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    113
  • A circular piece is cut from an aluminum sheet at room temperature. (a) When the sheet is then placed in an oven, will the hole (1) get larger, (2) get smaller, or (3) remain the same? Why? (b) If the diameter of the hole is 8.00 cm at 20° C and the temperature of the oven is , what will be the new area of the hole?

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    1
  • A circular ring of iron has a tight- fitting iron bar across its diameter, as illustrated in Fig. 10.21. If the arrangement is heated in an oven to a high temperature, will the circular ring be distorted? What if the bar is made of aluminum?

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    1