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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
| C | I | Question | Answer |
|---|---|---|---|
| 10 | What happens to its moment of inertia when a steel disk is heated? | It increases. | |
| 10 | What is the internal energy of 50 moles of Neon gas (molecular mass = 20 u) at 27°C? (R = 8.31 J/mol*K) | 1.9*10^5 J | |
| 10 | What is the root-mean-square speed of chlorine gas molecules at a temperature of 320 K? (R = 8.31 J/mol×K, NA = 6.02*10^23, and the molecular mass of Cl2 = 71) | 3.4*10^2 m/s | |
| 10 | What is the temperature of a system in thermal equilibrium with another system made up of ice and water at one atmosphere of pressure? | 273 K | |
| 10 | What is the temperature of a system in thermal equilibrium with another system made up of water and steam at one atmosphere of pressure? | 100°C | |
| 10 | Which best describes a system made up of ice, water and steam existing together? | triple point | |
| 10 | Which best describes the relationship between two systems in thermal equilibrium? | no net energy is exchanged | |
| 10 | Which best expresses the value for the coefficient of volume expansion, b, for given material as a function of its corresponding coefficient of linear expansion, α? | β = 3α | |
| 10 | Which of the following properties can be used to measure temperature? | all of the above | |
| 10 | With molar quantity and temperature held constant, by what factor does the pressure of an ideal gas change when the volume is five times bigger? | 0.2 | |
| 10 | With volume and molar quantity held constant, by what factor does the absolute temperature change for an ideal gas when the pressure is five times bigger? | 5.0 | |
| 11 | 100 g of liquid nitrogen at its boiling point of 77 K is stirred into a beaker containing 500 g of 15°C water. If the nitrogen leaves the solution as soon as it turns to gas, how much water freezes? The heat of vaporization of nitrogen is 48 cal/g and that of water is 80 cal/g. | none | |
| 11 | 125 g of dry ice (solid CO2 ) is dropped into a beaker containing 500 g of 66°C water. The dry ice converts directly to gas, leaving the solution. When the dry ice is gone, the final temperature of the water is 29°C. What is the heat of vaporization of solid CO2 ? (cwater = 1.00 cal/g×°C) | 148 cal/g | |
| 11 | A 0.003 0-kg lead bullet is traveling at a speed of 240 m/s when it embeds in a block of ice at 0°C. If all the heat generated goes into melting ice, what quantity of ice is melted? (Lf = 80 kcal/kg, the specific heat of lead = 0.03 kcal/kg×°C, and 1 kcal = 4 186 J) | 2.6*10^-4 kg | |
| 11 | A 0.2-kg aluminum plate, initially at 20°C, slides down a 15-m-long surface, inclined at a 30° angle to the horizontal. The force of kinetic friction exactly balances the component of gravity down the plane so that the plate, once started, glides down at constant velocity. If 90% of the mechanical energy of the system is absorbed by the aluminum, what is its temperature increase at the bottom of the incline? (Specific heat for aluminum is 900 J/kg×°C.) | 0.07 C° |
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