Physics, 04.04.2020 10:35 yuvraj2298
An engineering student claims that a refrigerator under development will absorb 1300 J of heat per cycle from its cabinet and
release 1200) of heat per cycle into the surroundings. Is it possible for this claim to be true?
A)Yes, if the motor for the refrigerator performed at least 100 ) of work per cycle.
B)No, because heat can never be transferred from a cold reservoir to a hot reservoir.
C)No, because this refrigerator would violate the first law of thermodynamics.
Answers: 2
Physics, 21.06.2019 22:30
Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter
Answers: 1
Physics, 22.06.2019 04:20
The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is
Answers: 1
Physics, 22.06.2019 16:00
The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?
Answers: 3
An engineering student claims that a refrigerator under development will absorb 1300 J of heat per c...
Biology, 13.01.2020 19:31
History, 13.01.2020 19:31
Mathematics, 13.01.2020 19:31
Health, 13.01.2020 19:31
Chemistry, 13.01.2020 19:31
Mathematics, 13.01.2020 19:31
Mathematics, 13.01.2020 19:31
Computers and Technology, 13.01.2020 19:31
Mathematics, 13.01.2020 19:31
Engineering, 13.01.2020 19:31
English, 13.01.2020 19:31
History, 13.01.2020 19:31
History, 13.01.2020 19:31
Physics, 13.01.2020 19:31