Why you so mean to me? leave my questions please. answer them

The higher the astm grain size number, the finer the gran is. a)-true b)-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)?

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.