subject
Engineering, 11.02.2020 17:08 AgarioEdit

You have a Switch LED Lightbulb with the following information:It is equivalent to a 60 Watt incandescent lightbulb. It uses 12 Watts of electricity. It is estimated to last 25,000 hours. It is dimmable. It produces 800 lumens of light. It has a color temperature of 2,700K (warm white).Based on this information, calculate the lighting efficiency of this bulb and determine whether this is more or less efficient than a traditional incandescent lightbulb. Then select the answer below that matches your calculation and your reason why it is more or less efficient. a. 67 lumens/Watt, more efficientb. 67 lumens/Watt, less efficientc. 0.015 lumens/Watt, more efficientd. 0.015 lumens/Watt, less efficient

ansver
Answers: 1

Another question on Engineering

question
Engineering, 03.07.2019 14:10
Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
Answers: 1
question
Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
question
Engineering, 04.07.2019 18:10
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
question
Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
You know the right answer?
You have a Switch LED Lightbulb with the following information:It is equivalent to a 60 Watt incande...
Questions
question
Mathematics, 25.09.2019 06:10
question
Mathematics, 25.09.2019 06:10
Questions on the website: 13722363