Atuning fork vibrates 88 times in 0.20 s what is its frequency

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.

How are positive ions different from neutral atoms

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?