____________________ in water is caused by the presence of suspended matter
Fill in the blank(s) with the appropriate word(s).
ANS: Turbidity
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Answer the following statement(s) true (T) or false (F)
1. When photons are absorbed by a photovoltaic cell, the energy decreases the mobility of electrons in the semiconductor material. 2. The amount of device current in a photovoltaic cell is directly proportional to cell size (surface area) and solar radiation intensity (watts per square meter). 3. An assembly of photovoltaic cells mounted on a panel is called an array. 4. As temperature decreases (gets colder), device voltage increases, and as temperature increases (gets warmer), the voltage decreases. 5. Some of the most common standard test conditions are: Solar intensity (irradiance) = 1000 watts / square meter Cell temperature = 25 degrees C
An ampacity adjustment of conductors in cable tray is more likely to be required when installing _____.
a. single-conductor cable b. conductors in ventilated tray c. 600V systems d. multiconductor cable
Who calculated the equivalent mechanical work performed by a horse and rated engines in terms of the unit of horsepower (hp)?
A. Georg Simon Ohm B. Robert A. Millikan C. James Watt D. Benjamin Franklin
European electrical power teansmission systems use a 60 Hertz frequency for AC.
Answer the following statement true (T) or false (F)