Sue and kevin kellman signed a contract for the construction of a cabin near pinetop. in building the $562,000 cabin, the builder discovered that it had to put the vent for the heating system in the area where the hall closet is located. the result was that the kellman’s had a halfcloset there instead of a fulllength closet that was open to the floor. the kellmans:
a. need not pay for the cabin because of this material breach.
b. can be compensated under the doctrine of force majeure.
c. can be compensated under the doctrine of commercial impracticability.
d. can be compensated under the doctrine of substantial performance

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero

What is creep? what is stress relaxation?