a wave traveling in the positive x direction has an amplitude of 2m frequency 75hz and velocity of propagation 45m/s. calculate the wave number , the displacement of the particle velocity and particle acceleration at x=1.35m from the origin at the time is 3second

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.