Aconstant head hydraulic conductivity test was run on a quartzsand specimen(gs= 2.65). the sample was 110mmlong with a diameter of 50 mm. the temperature of the water used to conduct the test was 22°c. after 5minutes, the discharge under a constant head of 25cmwas 79cm3. the mass of the solids of the sample was determined to be 385 g. calculate: a. temperature-corrected hydraulic conductivityin cm/secb. average flow velocity in cm/secc. seepage velocity in cm/sec

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?