Physics, 25.02.2020 00:52 cpcoolestkid4
One mole of nickel (6.02 ✕ 1023 atoms) has a mass of 59 g, and its density is 8.9 g/cm3. You have a bar of nickel 2.46 m long, with a square cross section, 1.9 mm on a side. You hang the rod vertically and attach a 43 kg mass to the bottom, and you observe that the bar becomes 1.5 mm longer. Next you remove the 37 kg mass, place the rod horizontally, and strike one end with a hammer. How much time t will elapse before a microphone at the other end of the bar will detect a disturbance
Answers: 3
Physics, 22.06.2019 00:30
Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine
Answers: 1
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 10:00
There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.
Answers: 1
One mole of nickel (6.02 ✕ 1023 atoms) has a mass of 59 g, and its density is 8.9 g/cm3. You have a...
Mathematics, 07.11.2020 06:10
English, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
Physics, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
Chemistry, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
History, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
Mathematics, 07.11.2020 06:10
History, 07.11.2020 06:10