Engineering, 12.12.2020 17:10 martina28
Footing: This is a 3 m wide strip footing, located on the ground surface of an isotropic, homogeneous
layer of soil. The footing places a uniform load of 50 kPa on the ground surface. The unit weight of the soil
is 1,800 kg/m3
and the depth to ground water is 3 m below the ground surface.
Calculate, tabulate and plot all three relevant stress variations – total overburden stress, effective
overburden stress, and final effective vertical stress – on a pressure vs depth diagram
Answers: 2
Engineering, 04.07.2019 18:10, ahmedeldyame
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.
Answers: 1
Engineering, 04.07.2019 18:10, siri5645
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
Answers: 1
Engineering, 04.07.2019 19:10, jimena15
10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.
Answers: 2
Engineering, 04.07.2019 19:10, gabrielaperezcz
Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?
Answers: 3
Footing: This is a 3 m wide strip footing, located on the ground surface of an isotropic, homogeneou...
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