A10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. at time t=0, the resulting mass-spring system is disturbed from its rest state by the force f(t)=140cos(8t). the force f(t) is expressed in newtons and is positive in the downward direction, and time is measured in seconds.

According to the phase diagram for water, how is the state of water determined? proceed up a vertical line at any given temperature read the phase at the intersection of any given temperature and pressure at a given pressure, proceed horizontally to the s-l or l-g line

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.