Compressors and Fans

What is the actual volume of air drawn in by the compressor as measured at the intake pressure and temperature?

What is the ratio of the compressor power output over the brake power input?

What is the total amount of work needed by the fan?

What is the energy possessed by air because of its velocity?

What is the energy required to overcome resistance?

What is the revolution per minute at which a given geometrically similar impeller of a fan?

What are the rules that express the relationship of fan capacity, head (either static or total), BHP input and air density when one of each parameter is changed?

What is the result of installing multiple fan side by side?