A 25-mF capacitor charged to 50 V and a capacitor C charged to 20 V are connected to each other, with the two positive plates connected and the two negative plates connected. The final potential difference across the 25-mF capacitor is 36 V. What is the value of the capacitance of C?
a. 43 mF
b. 29 mF
c. 22 mF
d. 58 mF
e. 63 mF
C
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A heat pipe having an effective length of 80 cm uses methanol as the working fluid. At an operating temperature of 20ºC the methanol flow rate is 12 mg/s, and the heat pipe uses an axially grooved wick arrangement with 60 equally spaced 2.1-mm-deep grooves. Determine the width of the grooves.
What will be an ideal response?
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A. A car starts from rest and accelerates. It then travels at a constant velocity before slowing to a stop.
B. A car starts from rest and moves forward. It stops for a while before returning to its starting position.
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