How is velocity different than speed?
-velocity is how fast something is moving at one specific moment. example: you can run on a treadmill
at 10 mph.
-velocity is speed with direction. example: you can run outside at 10 mph north.
- velocity is how fast something speeds up and slows down.
-velocity is a measurement of distance.

Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 93 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 15.5 kw from the compressor to its surroundings. assuming the ideal gas model for air neglecting kinetic potential energy effects, determine the power in put in kw.

If a small-diameter open glass tube is partially immersed in a vessel containing mercury, the surface of the mercury inside the tube will be a. lower than the mercury in the vessel, and shaped like the inside of a bowl. b. higher than the mercury in the vessel, and shaped like the inside of a bowl. c. lower than the mercury in the vessel, and shaped like the outside of an umbrella. d. higher than the mercury in the vessel, and shaped like the outside of an umbrella.

Dumbledore explains that a spectator ion is an ion which is not involved in the reaction under consideration. though snape thinks you all should know sometimes it seems snape would rather be teaching another or even be head of the anyway, which is a spectator ion involved in the reaction of k2cro4(aq) and ba(no3)2(aq)?