The ____ was once widely used to compare electrical charges and served as a crude voltmeter.

a. lightning arrester
b. electroscope
c. generator
d. conductor


b. electroscope

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You built a rectangular deck 14 ft long and 12 ft wide with a set of steps 48 inches wide. You builta railing on the outside using 2X4s around the top, capped with a 6-in deck board. The spindles were spaced on 4-inch or less centers. You built a rectangular patio 14 feet by 16 feet, using 4 inches of concrete for the floor. For the patio you removed 7 inches of dirt and replaced it with 3 inches of sand. To prevent erosion you constructed a 400-square-foot retaining wall. You used stones 15 inches wide, 6 inches high, and 10 inches deep. You are also a groundskeeper for an 18-hole golf course. The greens average 92 feet in diameter on which you applied 5 pounds per 1,000 square feet of 18-5-12 units of fertilizer. The fertilizer comes in 50-pound bags at $32.98 per bag.

a. How many square feet are in the deck? b. How many deck boards are needed for the floor running the length of the deck? c. How many of what length 2X4s and deck boards are needed for the railing? d. Approximately how many spindles are 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 are needed? h. How many cubic yards of concrete are needed? i. How many stones are needed for the retaining wall? j. What did it cost to fertilize the greens?

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What is the formula for Pascal’s law?

What will be an ideal response?

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A hot pull down is when ____.

A. there is excess ice on the evaporator B. the condenser contains an excess amount of liquid refrigerant C. the flow of refrigerant to the evaporator is reduced D. the load on the evaporator produces a suction pressure that increases the load on the compressor

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Which of the following sensors are commonly used as to measure the rate of acceleration or deceleration?

A. Roller-type B. Mass-type C. Solid-state D. All of these

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