Natural gas flows from a source at 100 bara through 100 m of 0.5-cm ID new commercial steel pipe to atmospheric pressure. The pipe is horizontal. Determine if this flow is choked for the adiabatic and isothermal cases.

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

Which property of water causes water drops to bead on a freshly waxed car?