Physics, 24.06.2019 08:20 katiepotter
Suppose a spacecraft orbits the moon in a very low, circular orbit, just a few hundred meters above the lunar surface. the moon has a diameter of 3500 km , and the free-fall acceleration at the surface is 1.60 m/s^2.how much time in minutes does it take for the spacecraft to complete one orbit?
Answers: 3
Physics, 22.06.2019 03:00
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
Answers: 2
Physics, 22.06.2019 13:40
Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?
Answers: 2
Physics, 22.06.2019 14:20
A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.
Answers: 3
Suppose a spacecraft orbits the moon in a very low, circular orbit, just a few hundred meters above...
Mathematics, 09.12.2020 23:10
English, 09.12.2020 23:10
Mathematics, 09.12.2020 23:10
History, 09.12.2020 23:10
English, 09.12.2020 23:10
Arts, 09.12.2020 23:10
Mathematics, 09.12.2020 23:10
Physics, 09.12.2020 23:10
Mathematics, 09.12.2020 23:10
History, 09.12.2020 23:10