A plane progressive wave is represented by the equation y= 2sin ( 2000πt- 0.5x),where the symbols wave their usual meanings. What is the frequency of the wave

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons