A 8.0 ?F capacitor is connected in series with a 6.0 k? resistor across a 20-V DC source and a switch. What is the time constant of this RC circuit?
A)
9.0 ms
B)
12 ms
C)
40 ms
D)
18 ms
E)
48 ms
E
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A circumferential steel fin is 8 cm long, 3 mm thick, and is on a 20 cm diameter rod. The surrounding air temperature is 20ºC and h = 35 W/m^2K, while the surface temperature of the rod is 300ºC. Determine a) Fin Efficiency and b) Heat transfer from the fin.
What will be an ideal response?
Your website costs less to publish if it is a simple one-color text piece than if it is a sophisticated piece with hundreds of colors.
Answer the following statement true (T) or false (F)
Which of the following is not an inertial reference frame?
A) a reference frame that is rotating at a constant rate B) a reference frame that is moving downward at a constant speed C) a reference frame that is moving westward at 10 km/s D) a reference frame that is motionless E) a reference frame that is moving upward at a constant speed
The magnetic field amplitude in an electromagnetic wave in vacuum is related to the electric field amplitude by B =
A.
B.
C.
D.
E.