The inductive reactance of an RLC circuit is 36
If the frequency is doubled, what is the new inductive reactance?
A. 72
B. 36
C. 19
D. 6.0
E. 3.0
A. 72
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If the average density of matter and energy in the Universe equals the critical density, space-time will be _____
A) finite B) flat C) positively curved D) negatively curved
Impedance: Which one of the following capacitances in series with a 100-? resistor and 15-mH coil will give a total impedance of 110 ? at 2.0 kHz?
A. 0.14 mF B. 46 ?F C. 10 ?F D. 0.56 ?F
The Sun's ________ transports material from the Sun's equator to its poles and back to the equator
Fill in the blank(s) with correct word
A horizontal 3-mm-thick flat copper plate, 1-m-long and 0.5-m-wide, is exposed in air at 27°C to radiation from the sun. If the total rate of solar radiation absorbed is 300 W and the combined radiative and convective heat transfer coefficients on the upper and lower surfaces are 20 and 15 W/(m2 K), respectively, determine the equilibrium temperature of the plate.
GIVEN
FIND
- The equilibrium temperature of the plate (Tp)
ASSUMPTIONS
- Steady state prevails
- The temperature of the plate is uniform
SKETCH
