The working substance of a cyclic heat engine is 0.75 kg of an ideal gas. The cycle consists of two isobaric processes and two isometric processes, as shown in Fig. 12.26. What would be the efficiency of a Carnot engine operating with the same high-temperature and low-temperature reservoirs?
Answer to relevant QuestionsEquation 12.15 shows that the greater the temperature difference between the reservoirs of a heat engine, the greater the engine’s Carnot efficiency. Suppose you had the choice of raising the temperature of the ...An ideal gas is under an initial pressure of 2.45 x 104 Pa and occupies a volume of 0.20 m3. The slow addition of 8.4 x 103 J of heat to this gas causes it to expand isobarically to a volume of 0.40 m3. (a) How much work is ...An ice machine is to convert 10oC water to 0oC ice. If the machine has a COP of 2.0 and consumes electrical power at a rate of 1.0 kW, how much ice can it make in 1.0 h? By rubbing the circular lip of a wide, thin wine glass with a moist finger, you can make the glass “sing.” (Try it.) (a) What causes this? (b) What would happen to the frequency of the sound if you added water to the ...A 0.25-kg object is suspended on a light spring of spring constant 49 N/m. The spring is then compressed to a position 15 cm above the stretched equilibrium position. How much more energy does the system have at the ...
Post your question