The second law of thermodynamics leads us to conclude that A) the total energy i
ID: 3163688 • Letter: T
Question
The second law of thermodynamics leads us to conclude that A) the total energy in the universe is decreasing with time. B) the total energy of the universe is constant. C) disorder in the universe is increasing with the passage of time. D) it is theoretically impossible to convert work into heat with 100% efficiency. E) the total energy in the universe is increasing with time. Is it possible to transfer heat from a hot reservoir to a cold reservoir? A) Yes this will happen naturally. B) Theoretically yes, but it hasn't been accomplished yet. C) Yes, but work will have to be done. D) No, this is forbidden by the second law of thermodynamics. As you walk away from a vertical plane mirror, your image in the mirror A) may or may not decrease in height, depending on where the observer is positioned. B) is always a real image, no matter how far you are from the mirror. C) changes from being a virtual image to a real image as you pass the focal point. E) decreases in height. Suppose you place your face in front of a concave mirror. Which one of the following statements is correct? A) If you position yourself between the center of curvature and the focal point of the mirror, you will not be able to see a sharp image of your face. B) Your image will always be inverted. C) Your image will be diminished be formed. D) No matter where you place yourself a real image will be formed. E) None of these statements are true. A ray of light goes from one transparent material into another, as shown in the figure. What can you conclude about the indices of refraction of these two materials? A) n1 > n2 B) n2 > n1 C) n1 greaterthanorequalto n2 D) n2 greaterthanorequalto n1 E) n1 - n2 PROBLEMs. Each Problem worth 16 points. for each problem on separate page or receive 5 points deduction. Make sure to clearly mark your answer and use correct units A 2.0-kg block of aluminum at 50 degree C is dropped into 5.0 kg of water at 20 degree C and the temperature is allowed to stabilize. What is the total change in entropy during this process, assuming no heat is exchanged with the environment? The specific heat of aluminum is 910 J/(kg-K) and the specific heat of water is 4190 J/(kg K).Explanation / Answer
7)
a) Yes it is possible to transfer heat from hot reservoir to cold reservoir and this will happen naturally.