một chất lỏng được đọc ở áp suất 200 kva qua vật liệu lọc có diện tích 0,2 mét vuông và xử trong 5 phút với 0,3 mét khối chất lỏng. Xác định thời gian lọc cho đến khi tốc đọ giảm xuống 5.10^-5 mét khối/s

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.

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?