Engineering, 12.03.2020 19:18 DwayneLeonard4088
The lighting needs of a classroom are met by 30 fluorescent lamps, each consuming 80 W of electricity. The lights in the classroom are kept on for 12 hours a day and 250 days a year. For a unit electricity cost of 11 cents per kWh, determine the annual energy cost of lighting for this classroom. Also, discuss the effect of lighting on the heating and air-conditioning requirements of the room.
Answers: 2
Another question on Engineering
Engineering, 04.07.2019 18:10
Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.
Answers: 3
Engineering, 04.07.2019 18:10
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
Answers: 1
Engineering, 04.07.2019 19:10
How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?
Answers: 2
You know the right answer?
The lighting needs of a classroom are met by 30 fluorescent lamps, each consuming 80 W of electricit...
Questions
Computers and Technology, 10.04.2020 03:55
History, 10.04.2020 03:55
English, 10.04.2020 03:55
Mathematics, 10.04.2020 03:55
Geography, 10.04.2020 03:56
Mathematics, 10.04.2020 03:56
Mathematics, 10.04.2020 03:56
Mathematics, 10.04.2020 03:56
Mathematics, 10.04.2020 03:56
