A closed pipe is 0.60 m long. The air temperature is 20°C. What is the fundamental frequency in the pipe? What would be the frequency of the 2nd harmonic in this pipe? What would be the wavelength of the 5thing harmonic in this pipe?

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.