You had 17.2 acres of alfalfa hay to be cut at a cost of $375.80 to have the hay cut. What was the cost per acre?
What will be an ideal response?
$21.85/a
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Follow the steps of the Systematic Approach of Section 14.4—that is, (1) identify the system, (2) determine whether the process is batch or rate, (3) construct a schematic diagram with inputs and outputs, (4) Label known material quantities or rates of flow and so on. The Lena Chemical Co. concentrates leftover acids from various chemical processes. Leftover acid from a nitrating process contains 24.0 percent nitric acid (HNO3), 55.0 percent sulfuric acid (H2SO4), and 21.0 percent water (H2O). This acid is to be concentrated (strengthened in acid content) by adding sulfuric acid with 92.0 percent H2SO4 and nitric acid containing 89.0 percent HNO3. The final product is to contain 31.0 percent HNO3 and 58.0 percent H2SO4. Compute the mass of the initial acid solution and the mass of the
concentrated acids that must be combined to produce 2.00(10³) lbm of the desired mixture. What will be an ideal response?
The most common type of gear found in automotive differentials is the ____________________ gear.
Fill in the blank(s) with the appropriate word(s).
Which type of battery tester uses electronic circuits to measure both a battery's state of charge and capacity?
A) Open circuit voltage tester B) Charging tester C) Conductance tester D) Load tester
One priciple of tubing design is to install manifold stations in central locations to ____ tubing runs between the manifold station and the room(s) to be heated.
a. straighten b. minimize c. maximize d. economize on