Which of the following erosion protection materials is manufactured with a layer of material between two layers of netting?
a. rip-rap
b. silt fence
c. hydromulch
d. erosion mats or erosion control blankets
d. erosion mats or erosion control blankets
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The density of water vapor in air changes rapidly with the change in air temperature. Data were recorded from an experimental test and are shown in the following table:
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What is the current across the MSB "rung" of a 4-bit R/2R Ladder DAC if the reference voltage is 6 V and R is 10 k??
A) 300 ?A B) 400 ?A C) 360 ?A D) 600 ?A
Nominal dimensions refer to the size of the material before drying
Indicate whether the statement is true or false
The following data are for a company that produces washers and dryers.
• Dryers retail for $198 and contribute $15 to profit. • Washers retail for $499.95 and contribute $45 for profit. • The washer blade is limited in production capacity to 50 blades, while all other components have no limits. • Chassis assembly requires 6 person-hours for each dryer set and 18 person-hours for each washer. The plant employs 225 workers for an 8-hour shift to perform chassis assembly operations. • A dryer requires 1 person-hour on the assembly line, a washer requires 1.6 personhours. There are 30 people on a single 8-hour shift assigned to assembly. • Final inspection requires 0.5 person-hour for a dryer and 2.0 person-hours for a washer. The plant employs 20 full-time inspectors and one part-time employee for 2 hours per day. a. Write a linear programming model. b. What is the optimum number of dryers and washers? c. Calculate the maximum profit. d. The linear-programming and break-even approaches are used to find the selling price for both the dryer and the washer, based on $10,000 fixed cost for both dryer and washer with a variable cost of $160 for the dryer and $330 for the washer. Determine how many days will be required until the company starts making a profit for the washers and the dryers. Use $198 and $500 as selling prices for the dryer and the washer, respectively.