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Question: The cross section of a concrete dam is shown in Figure. Using a simple plane frame model, estimate stresses in the-darn due to self-weight of the dam and the water pressure. Use a reasonable number of elements and assign average section properties to each element. Assume unit thickness perpendicular to the plane. The depth of the water behind the dam is 18m, The density of concrete is 2400 kg/m3 and that of water is 1000 kg/m3. The modulus of elasticity of concrete is 30 GPa.
A runaway truck with failed brakes is moving with a speed of 130 km/h just before the driver steers up an emergency escape ramp inclined at 15 degrees above the horizontal
Assuming a constant pressure gradient, if blood flow is reduced by 52%, by what factor is a blood vessel decreased in radius
An oak barrel with a lid of area 0.20 m2 is filled with water. A long, thin tube of cross-sectional area 5.0 X 10-5 m2 is inserted into a hole at the center of the lid, What was the net force on the lid due to the water pressure
two skaters each of mass m are standing a slight distance apart on a nearly frictionless horizontal surface of ice
Pretend I went to buy a big diamond or a big cubic zirconia (CZ) for making a ring in a gem show. The salesman first shines a light beam from air on the diamond at incident angle of 15 degrees. He then shines the similar light on to cubic zirconia at..
The intensity of the sound wave from a jet airplane as it is taking off is 86 W/m2 at a distance of 3.3 m. What is the intensity of the sound wave that reaches the ears of a person standing at a distance of 120 m from the runway
A 32-g ice cube at its melting point of 273 K is dropped into a huge, insulated container of liquid nitrogen. Suppose the nitrogen is at its boiling point of 77K and has a latent heat of vaporization of 200KJ/Kg. What is the entropy change of (a) liq..
An electric motor rotating a workshop grinding wheel at a rate of 98 rev/min is switched off. Find how long does it take for the grinding wheel to stop
A space freighter has a total mass of 1.00*10^6 kg. The captain wants to travel to a destination 1.00 light years away in 12 years, Approximately how much mass must be converted energy
Identical blocks are projected up each track with the same initial speed v0. On the longer track the block slides upward until it reaches a maximum height H above the ground. find the total height for the block on the shorter track
A 190 pF capacitor is charged to a potential difference of 120 V, and the charging battery is disconnected. The capacitor is then connected in parallel with a second (initially uncharged) capacitor. If the measured potential difference drops to 100 V..
A person weighing 119 pounds can run up 500 steps, How much power did the person expend running up the steps
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