The first law of thermodynamics is basically a special version of the law of ______________
Fill in the blank(s) with correct word
conservation of energy
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A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30° relative to the normal. If the index of refraction of water and glass are 1.33 and 1.5, respectively, at what angle (in degrees) does the light leave the glass (relative to its normal)?
a. 26 b. 35 c. 42 d. 22 e. 48
A refrigerator condenser is a heat exchanger that converts a refrigerant from a vapor to a liquid at constant pressure and approximately constant temperature. If ammonia is used as a refrigerant and 10 kg/s is condensed at 25ºC when the surrounding temperature is 20ºC, determine the heat transfer from the refrigerant using data from the Appendix Chart C-7.
What will be an ideal response?
A radioactive sample has a half-life of 10 min. What fraction of the sample is left after 40 min?
A) 1/32 B) 1/8 C) 1/2 D) 1/4 E) 1/16
Mutual Inductance: A 73-mH solenoid inductor is wound on a form that is 0.80 m long and 0.10 m in diameter. A coil having a resistance of 7.7 ? is tightly wound around the solenoid at its center. The mutual inductance of the coil and solenoid is 19 ?H. At a given instant, the current in the solenoid is 820 mA and is decreasing at the rate of 2.5 A/s. At the given instant, what is the induced current in the coil?
A. 6.2 ?A B. 4.9 ?A C. 7.4 ?A D. 8.6 ?A E. 9.9 ?A