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What is sound?
How is it generated?
How does it travel?
Can sound waves travel in a vacuum?
A certain element of soil is subject to a mean normal stress of 420 kpa and a deviator stress of 280 kpa. The major principal plane is rotated 30 degrees counterclockwise from horizontal.
A 10cm long cylindrical rod of steel is elongated to become 12.1cm long by the application of a force of 10kN. 1- What is the ration of initial diameter to final diameter, assuming no net volume change
Lake Mead has a water surface area of 65,800 hectares. In acertain month the reservoir is full, and the pan evaporation rateis 25 cm. Using a pan coefficient of 0.73, estimate theevaporation volume for the month in m3.
A multiple-piston hydraulic jack has two output pistons, each with an area of 250 cm^2. The input piston, whose area is 25 cm^2, is concerned to a lever that has a mechanical advantage of 9:1.
The sand particles range in diameter from 0.04 to 2.0 mm with a specific gravity of 2.65. The wastewater discharge rate is 1400 m3 /d at 20°C. Design a settling tank to remove all the metal and sand particles.
A tubular aluminium bar (G=28GPa) of square cross section with outer dimensions 50mm x 50mm must resist a torque T=300Nm. Calculate the minimum required wall thickness t_min if allowbale shear stress is 20MPa
At what speed the rule of 25 feet separation between two cars is safe?
When the athlete releases the shot it is 1.82m above the ground and its initial velocity=13.6 m/s. Determine the horizontal distance the shot travels form the point of release to the point where it hits the ground.
The beam is loaded with a concentrated live load of 10 kips at the center of its span, in addition to its own weight.. The dead load includes the beam weight. The steel is A242, Grade 50.
Determine the work done by the air and the total heat transferred to the air during this process. Also show the process on a P-v diagram.
Assuming that the shear stress in the bolts is uniform, determine the number of bolts necessary to make the maximum shear stress in the shaft equal to the shear stress in the bolts. Each bolt has a diameter d.
Laboratory clean rooms are often kept at a slightly higher pressure than ambient pressure in order to flush out particulates and keep dust from getting in. If the pressure in such a room is equivalent to 1 mm water greater than the surrounding roo..
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