Terminal velocity in the presence of buoyancy force Settling velocity W s of a sand grain (diameter d, density 2650 kg/m 3) in water at 20 Â°C, computed with the formula of Soulsby (1997). When the buoyancy effects are taken into account, an object falling through a fluid under its own weight can reach a terminal velocity (settling velocity) if the net force acting on the object becomes zero.
Definition of poorâmouth. 1  intransitive verb. : 2  to plead poverty as a defense or excuse. 3  transitive verb. : 4  to speak disparagingly of.
not look a gift horse in the mouth. if someone tells you not to look a gift horse in the mouth, they mean that you should not criticize or feel doubt about something good that has been offered to you Okay, it's not the job of your dreams but it pays good money. I'd be inclined not to look a gift horse in the mouth if I were you.