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HW1: A gas flows through a horizontal pipe with cross-sectional area of 30 cm2. At certain point, gauge pressure is 300 kpa when the temperature is 20 °C. At another point, the cross-sectional area is 15 cm and the gauge pressure is 250 kpa. If the mass flow rate was 0.15 kg/s, find the velocities at these points? Assume isothermal process and take Patm as 100 kpa.

HW1: A gas flows through a horizontal pipe with cross-sectional area of 30 cm2. At certain point, gauge pressure is 300 kpa when the temperature is 20 °C. At another point, the cross-sectional area is 15 cm and the gauge pressure is 250 kpa. If the mass flow rate was 0.15 kg/s, find the velocities at these points? Assume isothermal process and take Patm as 100 kpa.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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HW1: A gas flows through a horizontal pipe with cross-sectional area of 30 cm. At certain point, gauge pressure is 300 kpa when the temperature is 20 °C. At another point, the cross-sectional area is 15 cm and the gauge pressure is 250 kpa. If the mass flow rate was 0.15 kg/s, find the velocities at these points? Assume isothermal process and take Patm as 100 kpa. HW2: A gas with a velocity of 350 m/s flows through a horizontal pipe at a section when the pressure is 80 kpa (absolute) and the temperature 303 k. The cross-sections have changed and the pressure became 120 kpa (absolute). Find the velocity of the changed section when the flow is assumed to be adiabatic? HW3: A gas flows a horizontal pipe when the cross-sectional area has changed from 40 cm to 20 cm and the gauge pressure from 400 kpa to 300 kpa at 15 °C. If the mass flow rate is 0.5 kg/s and the change is assumed to be isothermal, find the velocities before and after the change? Take Patm = 100 kpa and R=292 J/kg. k.
Transcribed Image Text:HW1: A gas flows through a horizontal pipe with cross-sectional area of 30 cm. At certain point, gauge pressure is 300 kpa when the temperature is 20 °C. At another point, the cross-sectional area is 15 cm and the gauge pressure is 250 kpa. If the mass flow rate was 0.15 kg/s, find the velocities at these points? Assume isothermal process and take Patm as 100 kpa. HW2: A gas with a velocity of 350 m/s flows through a horizontal pipe at a section when the pressure is 80 kpa (absolute) and the temperature 303 k. The cross-sections have changed and the pressure became 120 kpa (absolute). Find the velocity of the changed section when the flow is assumed to be adiabatic? HW3: A gas flows a horizontal pipe when the cross-sectional area has changed from 40 cm to 20 cm and the gauge pressure from 400 kpa to 300 kpa at 15 °C. If the mass flow rate is 0.5 kg/s and the change is assumed to be isothermal, find the velocities before and after the change? Take Patm = 100 kpa and R=292 J/kg. k.
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