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A camera is packed in a box and surrounded by packing material. The box is dropped vertically onto a horizontal surface. The vertical velocity of the box at the time that it hits the surface is v= 5m/s. After impact the camera experiences an acceleration of a = -kx, where k is a constant and x is the compression of the packing material. If the packing material experiences a maximum compression of 30 mm, determine the maximum acceleration of the camera.
A 3000-lb car has a maximum speed (at sea level and on a level, paved surface) of 140 mi/h with 16" radius wheels, a gear reduction of 3.5 to 1, and a drivetrain efficiency of 92%. It is know that at the car's top speed the engine is producing 220..
Find the nominal flexural strength from part (d.) to the service capacity from part (c.). e.) Compute the ratio of the flexural strength from part (d) to the service capacity from part (c).
A rectangular unfinished concrete channel with wood forms is laid on a bottom slope of 0.0064 to carry a flow of 20m^3/s of water. Determine the width of the channel when the flow is in critical condition.
A wastewater treatment plant has a flow of 35,000 m3/day. Calculate the mass of sludge wasted each day (QwXw, expressed in kg/day) for an activated-sludge system operated at a solids retention time (SRT) of 5 days
An uncatalyzed reaction has a rate of 4.2 x 10-7 sec-1. When an enzyme is added the rate is 3.2 x 104 sec-1. Calculate the rate enhancement caused by the enzyme.
The mass center of the unbalanced disk of weight W is located at G, which is a distance of R/2 from the center for the disk. In the equilibrium postition, the two springs attached to the rim of the disk are undeformed.
Draw a meq/L bar graph forthe following analysis of groundwater, and comment onthe completeness of theanalysis (e.g. based on electroneutrality). Determine the hardnessand total alkalinity, and expressthem in units of mg/L as CaCO3. How much ofthe ha..
House chilled water is available for cooling coming from 6-in dia. chilled water line carrying chilled water at approximate constant 40 degree F temperature. Chilled water pressure in the 6-inch line is 110psig.
If the load effect has a mean value of 88 kips and a standard deviation of 1.8 kips. If the nominal material strength is 160 kips Determine the followings 1- The probability of failure of the structure under the nominal resistance and service load..
A field sample of medium sand with median grain size of 0.84 mm will be tested to determine the hydraulic conductivity using a constant-head permeameter. The sample has the length of 30 cm and a diameter of 5 cm.
A strata of clean, light-colored quartz sand located below the groundwater table has a moisture content of 25.6%. The minimum and maximum void ratios of this soil are 0.380 and 1.109, respectively
The axis of the three-hinged arch ABC is a parabola with vertex at B. Knowing that P=109.2 kips and Q=72.8 kips, determine (a) the components of the reaction at C, (b) the components of the force exerted at B on segment AB.
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