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

Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil

Area around a charged object where the objects can exert a force on another charged objects is an electric

Which sentences describe point source pollution? in this type of pollution, the source of the pollution is single and easily identifiable. when runoff water from the melting of snow mixes with debris, it creates pollution. the runoff water, mixed with pollutants, reaches large areas with disastrous effects. alternatively, when a wastewater treatment plant releases harmful chemicals into a stream, the chemicals pollute the stream water because they are not treated for safety.