Final answer:
The pressure difference indicated by the manometer is 0.83 psig.
Step-by-step explanation:
In order to determine the pressure difference indicated by the manometer, we can subtract the height in one tube from the height in the other tube. So, the pressure difference can be calculated as follows:
Pressure difference = height in first tube - height in second tube
Pressure difference = 30 inches - 7 inches = 23 inches (wc)
To convert inches of water column (wc) to pounds per square inch (psig), we can use the conversion factor 1 ps = 27.7" wc. Therefore, the pressure difference in psig can be calculated as:
Pressure difference in psig = (23 inches) / (27.7 inches/ps) = 0.83 psig