1. Natural gas (methane) flows at 16 m/s through a pipe with a 1.5 m diameter. The temperature of the methane is 15°C, and the pressure is 200 kPa gage. Determine the mass flow rate. 2. A heating and...

1. Natural gas (methane) flows at 16 m/s through a pipe with a 1.5 m diameter. The temperature of the methane is 15°C, and the pressure is 200 kPa gage. Determine the mass flow rate.

2. A heating and air-conditioning engineer is designing a system to move 1000 m3 of air per hour at 100 kPa abs, and 30°C. The duct is rectangular with cross-sectional dimensions of 1 m by 20 cm. What will be the air velocity in the duct?