Water drains at a constant rate through a saturated soil column with a diameter of 1 ft and a height of 2.5 ft. The hydraulic head is maintained at 4.7 ft at the top of the column and 1.4 ft at the bottom. After a period of 1 hr, 0.06 ft3 of water has drained through the column. What is most nearly the hydraulic conductivity (ft/s) of the soil? a. 9.1 times 10^-6 ft/s
b. 4.6 times 10^6 ft/s
c. 3.5 times 10^-6 ft/s
d. 7.1 times 10^-6 ft/s

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