Business Driven Information Systems
Business Driven Information Systems
6th Edition
ISBN: 9781260004717
Author: Paige Baltzan
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 6, Problem 7CBT
To determine

To discuss:

  • Whether you agree with President Obama’s statement.
  • Who is responsible for verifying the accuracy of online information?
  • The measure that could take against companies that post inaccurate information.
  • The measure that could take against individual that posts inaccurate information.
  • Things to remember when reading or citing sources for online information.

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A single-pass crossflow heat exchanger is used to cool jacket water (cp = 1.0 Btu/lbm.°F) of a diesel engine from 190°F to 140°F, using air (Cp = 0.245 Btu/lbm.°F) at inlet temperature of 90°F. Both air flow and water flow are unmixed. If the water and air mass flow rates are 85500 lbm/h and 400,000 lbm/h, respectively, determine the log mean temperature difference for this heat exchanger. Assume the correction factor F to be 0.92. Air flow (unmixed) Water flow (unmixed) The log mean temperature difference of the heat exchanger is °F.
Deformation of a retaining wall is assumed to be as presented in the figure below. Determine:a) variation of the active and passive pressures on the wall for the presented deformation b) magnitude of the total horizontal force on the right side of the wall.
2. a) Consider a cable used for aerial tramway (see figure a). The span is 400 m. The unstretched length of the cable is 402 m. Its mass per unit length is 10kg. The elasticity EA = 10 N. Find the horizontal load on the two ends and the sag d. Determine if the small sag condition is satisfied.  b) When a cable car whose mass is 500kg is hung below the cable at a horizontal distance of 100 m from the left end, find the horizontal load on the ends.  C) As the car goes along the cable, at which position you will see maximum horizontal load on the two ends?
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