Which chemical is used to strengthen lead grids in maintenance-free batteries?
A) Copper B) Antimony C) Calcium D) None of these
C
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You built a rectangular deck 16 feet long and 8 feet wide with a set of steps 36 inches wide. You built a railing on the outside using 2X4s around the top, capped with a 6-inch deck board. The spindles are spaced on 4-inch or less centers. You built a rectangular patio 12 feet by 16 feet with a 4-inch concrete floor. For the patio you were required to remove 7 inches of dirt and replace it with 3 inches of sand.
a. How many square feet are in the deck? b. How many deck boards were needed for the floor running the length of the deck? 2 CHAPTER 12 • Landscaping © 2012 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part. c. How many of what length 2X4s and deck boards were needed for the railing? d. Approximately how many spindles were needed? e. What is the area of the patio? f. How many cubic feet of dirt were removed? g. How many cubic feet of sand were needed? h. How many cubic yards of concrete were needed?
Explain the difference between direct current and alternating current and give at least one example of where you might find each in a motorcycle's electrical system.
What will be an ideal response?
The equivalent length of the runs in a residential house will often be how long?
A) 50 ft B) 1,000 ft C) 10 ft D) 100 ft
Stress has been defined as the reaction of the human organism to a threatening situation.