The larger the displacement of an engine, the less power it produces true or false

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

Wiy doeres rere okhn a pump whon working betwon the same pressure range?

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?