When using the SMAW process, operating or closed voltage: O has not relation to open circuit voltage.
0 Is always lower than open circuit voltage.
Is always higher than open circuit voltage.
O I do not know.

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m