CONE 340 SDSU Design and Analysis of Construction Operations Questions

Problem 1 A contractor wants to investigate the production and cost differences of using a 7S blade on a D7H) dozer or an S blade on an 824 dozer. The material is a dry sand, and it is to be moved a distance of 250 ft from the beginning of the cut. The dozing is uphill on a 5% grade. The operator will have average skill, the dozers have power-shift transmissions, and traction is assumed to be satisfactory. The operating technique is slot dozing. The site will be dusty with some visibility loss. The material weighs 103 pcf in the bank state and has a swell percent of 15%. Job efficiency is assumed to be equivalent to a 50-min hour. Calculate the direct cost of the proposed earthmoving operation in dollars per bcy. Assume that the O&O cost for the D7 dozer is $116.00 per hour and $127.00 per hour for the 824. The operator’s wage is $45.00 per hour plus 35% for fringes, workman’s compensation, and other benefits.Complete the following for each dozer. Round all numbers to the nearest TWO decimals unless otherwise specified. If a number starts with 0, for example 0.45, do not omit the 0, write it as 0.45. D7H-7S824-S1- Ideal production rate (round to nearest whole #)2- Material-weight correction factor3- Operator correction factor4- Material-type correction factor5- Operating-technique correction factor6- Visibility correction factor7- Job Efficiency factor8- Machine transmission factor9- Blade adjustment factor10- Grade correction factor11- Total correction factor12- Dozer production in LOOSE CY (round to nearest whole #)13- Dozer production in BANK CY (round to nearest whole #)14- Total cost per hour to operate the dozer15- Direct production cost per bcyProblem 2 A limestone formation, with an average depth of 5 ft is exposed over the full 80-ft width and 23,700-ft length of a highway cut. Preliminary seismic investigations indicate that the rock layer has a seismic velocity of 5,500 fps. The contractor proposes to loosen this rock by using a single-shank ripper on a power shift, track-type tractor.The job conditions relative to lamination and other rock characteristics are average, or midway between adverse and ideal. A 40-min hour working efficiency is possible. The contractor wishes to explore the use of two D10T2 Caterpillar dozers with single shank (for performance data see the CAT Handbook posted on Blackboard and check the assumptions). O&O cost for these tractors is $126.00 per hour including rippers. However, dozers in ripping applications increase O&O cost 30-40%. The operator’s wage & benefits is $74.30 per hour.Q: What is the project duration with two dozers (8 hour work days)?Q: What is the cost/bcy to rip this rock?
CONE 340 SDSU Design and Analysis of Construction Operations Questions

I’m working on a chemistry discussion question and need an explanation to help me study.

InstructionsIntermolecular forces play fundamental roles that affect substances’ properties including:Vapor pressureCapillary actionBoiling point/Melting pointViscositySolubilityExamine a specific case that interests you where intermolecular forces play an important role. Some ideas include:Solubility: Like-dissolves-likeWhy are some vitamins like vitamin A toxic at high concentrations, but others like vitamin C are not?How do soaps and alcohols act as antimicrobials?How do soaps make grease become soluble?Capillary ActionHow do plants use capillary action to move water into their stems and leaves?Hydrogen bondingHow do hydrogen bonds play a role in DNA structure?How do hydrogen bonds play a role in drugs binding to their targets. (You can return to your previous discussion on molecular shapes and examine drug-target binding. The molecular modeling program that you used draws dashed lines to represent hydrogen bonds between the drug and its target).Boiling point/melting pointHow do London-dispersion forces affect melting points of triglycerides, causing some to be fats while others are oils.What is the difference between old-fashioned peanut butter and hydrogenated peanut butter and why is hydrogenated peanut butter solid at room temperature?Consider the intermolecular forces that must occur when a virus infects a cell. Here’s a video simulation. This might require some advance knowledge of biology, but still, you can see there are a lot of interactions that must occur.Grading Clearly indicates the topicExplains how the topic is related to and is affected by intermolecular forcesProvides something interesting or unexpected or explains why the topic was chosen Provides 2 references
Chemistry Solubility Discussion

Choose a topic in which you explore an issue related to medical education, practice, research, policy, etc. that emanates from the required readings for this course. Students should also indicate whom they have chosen to interview (and his or her credentials) as one of the five required sources for this Research Project. Students will be provided with suggested questions for their Interviews with Health Care Professionals, which they may use as they deem appropriate.The Research Essay (following MLA specifications for citations and a Works Cited list) of approximately 1,500 words on the topic that you have chosen for your Research Project. Be sure to include at least five related, reliable, and retrievable sources, including your reference to an interview that you have conducted with a health care professional.Students are required to interview a health care professional, such as the following: a physician; medical researcher; bio-ethicist; university-level educator who teaches courses related to health care, medical policy, or the history of medicine; or an individual who deals with health care policy.
Hudson County Community College Effects of Social Media on Mental Health Paper