Physics, 31.03.2020 01:05 naajaae5040
During 4 hours one winter afternoon, when the outside temperature was 10° C, a house heated by electricity was kept at 19° C with the expenditure of 58 kwh (kilowatt·hours) of electric energy. (a) What was the average energy leakage in joules per second (watts) through the walls of the house to the environment (the outside air and ground)? watts (b) The rate at which energy is transferred between two systems due to a temperature difference is often proportional to their temperature difference. Assuming this to hold in this case, if the house temperature had been kept at 22° C (71.6° F), how many kwh of electricity would have been consumed? kwh
Answers: 1
Physics, 21.06.2019 20:20
Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?
Answers: 1
Physics, 21.06.2019 22:30
Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?
Answers: 1
Physics, 22.06.2019 09:50
If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?
Answers: 3
During 4 hours one winter afternoon, when the outside temperature was 10° C, a house heated by elect...
Mathematics, 28.07.2019 15:30
Geography, 28.07.2019 15:30
Mathematics, 28.07.2019 15:30
Mathematics, 28.07.2019 15:30
Mathematics, 28.07.2019 15:30
Biology, 28.07.2019 15:30