How many trips would one rubber-tired herrywampus have to make to backfill a space with a geometrical volume of 5400 cubic yard? the maximum capacity of the machine is 30 cubic yard (heaped), or 40 tons. the material is to be compacted with a shrinkage of 25% (relative to bank measure) and has a swell factor of 20% (relative to bank measure). the material weighs 3,000 lb/cu yd (bank). assume that the machine carries its maximum load on each trip. check by both weight and volume limitations.

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed