what the velocity of the air in a duct with a total pressure of is 0.15 wc and a static pressure of 0.1 in wc

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

In what direction does the medium move relative to the direction of the wave? explain.

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor