Afan of 45 kg has an unbalance that creates a harmonic force. a spring-damper system is designed to minimize the force transmitted to the base of the fan. a damper is used with a damping ratio of ζ=0.2 (not c). a) calculate the required spring stiffness

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

see earlier

the right answer is 0.3 meters per second

there are no atoms