The voltage vC (t) across a capacitor is shown in Figure P4.25. Determine and sketch the current iC (t) through the capacitor.
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Analysis:
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The radius of a circle is 17.05 cm and the central angle is 240o. What is the area of the sector to the nearest tenth of a sq cm?
A. 600.7 B. 608.8 C. 616.7 D. 620.9
Material in a lagoon is decomposed by _____________________ bacteria
Fill in the blank(s) with correct word
Select the lifting techniques that will reduce the possibility of injury from lifting a heavy item. (You may select more than one.)
A) Keep the load close to your body. B) Use your back muscles to do the work. C) Keep your back as straight as possible. D) Use your leg muscles to do the work. E) Lift slowly. F) Lift quickly. G) Keep your knees as straight as possible.
What is the primary difference between air cooled condensers on standard efficiency systems and air cooled condensers on high efficiency systems?
A) The coil size is decreased to raise the head pressure and increase the temperature difference. B) The number of fins per inch are reduced to reduce the restriction to airflow. C) The condenser coils are made from steel instead of copper or aluminum. D) The coil size is increased to increase the heat transfer area.