Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Consider merge join for "select * fromr,swherer.B= s.A", assuming both joining attributes inrandsare sorted. The pseudo- code is shown in Figure 12.7 in the textbook and can also be found in the merge-join.pptx.
(1) Discuss the assumptions behind the given pseudo-code for the number of reading disk blocks for the merge join to bebr+bswhen the number of blocks assigned to the merge join isM= 3 (one for each relation, and one for writing the join results).
(2) Discuss whether the given pseudo-code can always get correct answers in general. Justify your answers using examples.
(3) Give your modified merge join to give the correct answers for all cases with explanation in details.
A fan is to be selected to ventilate a bathroom whose dimensions are 2 m x 3 m x 3 m. The air velocity is not to exceed 8 m/s to minimize vibration and noise. The combined efficiency of the fan-motor unit to be used can be taken to be 50 percent.
You are to perform a dynamic pile load test on a24-inch OD open ended homogeneous pipe pile. The pile has a shellthickness of 0.5 inch and is 80 feet long. Calculate: Compression wave velocity(hint: E=29x106 psi, g=490 pcf)
Determine the percent error n in replacing the sine and the tangent of an angle by the value of the angle in radians for angle values 5 degrees, 10 degrees, and 20 degrees. Explain the qualitative difference between the sine and tangent results.
If D1 = 60 cm, D2, = 40 cm, D3 = 54 cm, L1 = 400 m, L2 = 450 m, and L3 = 750 m. Assume f = 0.0125 (3 riveted steel pipes). Determine the total flow if the system head loss is 60 m.
A vertical curve is to connect two tangents that intersect at station 50+00 and the elevation 500.00ft. The back tangent gradient is -4 percent, the forward tangent gradient is 2 percent, and the elevation of the curve at station 48+50 must equal ..
A PVC pipe has an inside diameter of 40 mm, is 30 m long and carries 10°C water at a rate of 3.5 m3/hr. At this rate, the friction factor of the pipe is 0.0814.
Calculate the X, Y and Z coordinates of point B for radial readings taken to B from occupied station A, if the backsight azimuth at A is 25°32'48", the elevation of A = 610.098 m, and hi = 1.45 m
When the air temperature is 25°C, the pressure gage reads 210 kPa. If the volume of the tire is 0.025 m3, determine the pressure rise in the tire when the air temperature in the tire rises to 50°C.
A static thrust stand is to be designed for testing a specific jet engine. Knowing the following conditions for a typical test,
a navel gun (E= 30,000 ksi and G = 11,600 ksi) with a bore of 16 in. develops a maximum internal pressure of 20,000 psi. Determine a. the minimum outside diameter required if the maximum tensile stress permitted in the gun barrel is 36,000 psi.
Suppose the duration of a storm with rain fallingat an intensity (i) of 0.025 inches per hour was such that therational method (Q = C i A) could be used to calculate runoff fromall the land area in the Quabbin watershed.
A horizontal rectangular concrete channel terminates in a free outfall. The channel is 4m wide and carries a discharge of water 12 cms. What is the water depth 300 m upstream from the outfall
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd