60 point offer for a real, full answer.
a man is sitting on a chair. identify the true scenario from the following options: (5 points)
group of answer choices

the man exerts a greater downward force on the chair than the upward force exerted on him by the chair.

the chair exerts a greater upward force on the man than the downward force exerted on the chair by the man.

the chair exerts an upward force on the man, while the man does not exert any force on the chair.

the man exerts a downward force on the chair, while the chair does not exert any force on him.

the magnitude of the downward force exerted by the man on the chair is equal to that exerted on him by the chair.

An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt,c and rt,h, and qin, as where rtot rt,c rt,h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc,n 0.05 k/w and rh,n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh,d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th,i tc,i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

What happens when you slowly pulled the carboard?