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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 | A long steel beam has a length of twenty-five meters on a cold day when the temperature is 0°C. What is the length of the beam on a hot day when T = 40°C? (αsteel= 1.1*10^-5/C°) | 25.011 m | |
| 10 | A material has a coefficient of volume expansion of 60*10^-6/°C. What is its area coefficient of expansion? | 40&10^-6/°C | |
| 10 | A pipe of length 10.0 m increases in length by 1.5 cm when its temperature is increased by 90°F. What is its coefficient of linear expansion? | 30*10^-6/°C | |
| 10 | A pressure of 1.0*10^-7 mm of Hg is achieved in a vacuum system. How many gas molecules are present per liter volume if the temperature is 293 K? (760 mm of Hg = 1 atm, R = 0.0821 L*atm/mol*K, and NA = 6.02*10^23) | 3.3*10^12 | |
| 10 | A quantity of a monatomic ideal gas expands to twice the volume while maintaining the same pressure. If the internal energy of the gas were U0 before the expansion, what is it after the expansion? | 2 U0 | |
| 10 | A rectangular steel plate with dimensions of 30 cm X 25 cm is heated from 20°C to 220°C. What is its change in area? (Coefficient of linear expansion for steel is 11*10^-6/C°.) | 3.3 cm^2 | |
| 10 | A room has a volume of 60 m3 and is filled with air of an average molecular mass of 29 u. What is the mass of the air in the room at a pressure of 1.0 atm and temperature of 22°C? R = 0.082 L*atm/mol*K | 72 kg | |
| 10 | A spherical air bubble originating from a scuba diver at a depth of 18.0 m has a diameter of 1.0 cm. What will the bubble's diameter be when it reaches the surface? (Assume constant temperature.) | 1.4 cm | |
| 10 | A steel plate has a hole drilled through it. The plate is put into a furnace and heated. What happens to the size of the inside diameter of a hole as its temperature increases? | increases | |
| 10 | A steel sphere sits on top of an aluminum ring. The steel sphere (a = 1.10*10^-5/C°) has a diameter of 4.000 0 cm at 0°C. The aluminum ring (a = 2.40*10^-5/C°) has an inside diameter of 3.9940 cm at 0°C. Closest to which temperature given will the sphere just fall through the ring? | 116°C | |
| 10 | A steel wire, 150 m long at 10°C, has a coefficient of linear expansion of 11*10^-6/C°. Give its change in length as the temperature changes from 10°C to 45°C. | 5.8cm | |
| 10 | A substance is heated from 15°C to 35°C. What would the same incremental change be when registered in kelvins? | 20 | |
| 10 | A tank with a volume of 0.150 m^3 contains 27.0°C helium gas at a pressure of 100 atm. How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27.0°C and absolute pressure of 1.20 atm? Assume all the helium is transferred to the balloons. | 884 balloons | |
| 10 | A temperature change from 15°C to 35°C corresponds to what incremental change in °F? | 36 | |
| 10 | A temperature of 233 K equals which of the following? | -40°F |
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