1.A 20g mass vibrates accordings to the equation x=0.0009cis(3pit/2 + pi/2). Find the amplitude, period, max velocity, max acceleration, spring constant "K", and the total energy of the system?
2.Create a depreciation schedule showing annual depreciation amounts and end-of-year book values for a $26,000 asset with a 5 year service life and a $5000 salvage value, using the MACRS depreciation method.
3.An operator at a wastewater treatment plant decided to increase the SRT from 5 to 10 Days How will this affect:
a)the oxygen requirement?
b) MLVSS in the aeration tank?
c)the effluent BOD or COD?
d) and the sludge generation? Please explain the answers using the kinetic equations for activated sludge process.