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A laboratory is analyzing and reporting samples on a continual basis. Historical data for the analysis of spiked samples established that P(ave) =98, and sp = 4%; the control chart limits are P(ave) (ie. percent recovery) +/- 3sp, or 86% and 110%. A sample with a measured background level (Bi) of 22 mg/l was spiked with the equivalent of 30 mg/l without appreciably changing the sample volume. The result for the spiked sample (Ai) was 49.2 mg/l. Calculate Pi and determine if it falls with the control chart limits.
If the pressure in pipe B is decreased 10 kPa and the pressure in pipe A remains unchanged, determine the new reading along the inclined leg of the mercury manometer.
You fill a 2-cubic foot wheelbarrow to the top with aggregate. if the specific gravity of the aggregate is 2.548 and 18% of the aggregate is void spaces, how much does the aggregate in the wheelbarrow weight?
Which of the following is not a basic systems engineering concept?a. Define need before function
In a right triangle with the hypotenuse c = 10 and the angle A =50 degrees , what is the value of side b ?
List some of the common sources of sulphate ions in natural and industrial environments. For a given sulfate concentration, explain which of the following solutions would be the most deleterious and which would be the least deleterious to a permea..
A company that manufactures regenerative thermal oxidizers made an investment 10 years ago that is now worth $1,300,000. How much was the initial investment at an interest rate of 15% per year (a) simple interest and (b) compound interest?
You are a Project Manager on site where work for 3K.m. long Tunnel has been undertaken. The site is remote and takes about 2 days travel to nearest town. Supervisors, Technicians & Skilled Workers are engaged in dangerous / hazardous work.
A worker needs to enter a confined space to tighten the packing on a leaking argon valve. Describe two procedures that could be used to isolate the argon line and valve prior to starting work.
A 4 X 8-ft solar collector has water circulating through it at the rate of 1.0 gallon per minute while exposed to sunlight with intensity 300 Btu/ft^2-hr.
If an aerial photograph is taken with this camera tilted angleA=35° at an altitude 5000ft., calculate for the ground distance of the angular coverage 60°.
Which software do we use to calculate force and moment, and draw shear and moment diagram? I really need this software to design my structural project. Please helps me... thank you so much.
Question about Spring, A 37kg object is placed onto a coil spring which has been compressed 43mm. The force used to compress the spring was 35KN.
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