Engineering, 25.10.2021 14:00 mariiuuuh
Một đường dây 10KV cấp điện cho 2 phụ tải có thông số như 2AC-50,5Km, AC-50, 3Km. Hãy xác định giá tiền tổn thất điện năng 1 năm trên đường dây, biết X0=0,4 (Ω/Km), c=500(đ/KWh)
Answers: 1
Engineering, 04.07.2019 18:10, johnthienann58
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
Answers: 2
Engineering, 04.07.2019 18:10, kevin72836
Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?
Answers: 2
Engineering, 04.07.2019 18:10, QueenLife4869
Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.
Answers: 3
Một đường dây 10KV cấp điện cho 2 phụ tải có thông số như 2AC-50,5Km, AC-50, 3Km. Hãy xác định giá t...
Biology, 21.11.2020 01:00
Mathematics, 21.11.2020 01:00
Advanced Placement (AP), 21.11.2020 01:00
Social Studies, 21.11.2020 01:00