Eccentricity an air compressor of mass 60kg is mounted on an elastic support (i. e., spring) and operates at a speed of 1000 rpm. the compressor is out of balance with an unbalanced mass of 2kg and eccentricity of 0.1m. there is no damping and the spring rate is not known for part a)- write out the equation of motion with all available values b)- if the spring rate of the elastic support is 50 n/mm, what is the magnitude of the displacement? c)-find a new spring rate for the elastic support that results in a transmitted force equal to 25% of the unbalanced load (meω^2).

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.