Fluid dynamics is the study of the motion of liquids, gases and plasmas. Flow is dependent on the intrinsic properties of the matter itself, such as compressibility, viscosity and density.

He also said that President Recep Tayyip Erdogan of Turkey was pushing for a four-way meeting with him, Mr. Trump, Mr. Putin and Mr. Zelensky. Vladimir Medinsky, the head of the Russian delegation ...

Pugh said he and Kania smoked marijuana before attending a concert ... started the car and threw it in reverse," Pugh said. "When the car backed up, I held onto the door a little bit and he ...