Suppose the circuit parameters in a series RLC circuit are: L = 1.00 ?H, C = 10.0 nF, R = 100 ?, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance
1.59 MHz, 2.20 A
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What is the main reason that Venus is warmer than Earth?
a. The Sun’s light is stronger for Venus since it is closer to the Sun than Earth. b. Venus has a higher reflectivity than Earth. c. Venus has a lower reflectivity than Earth. d. The greenhouse effect is much stronger on Venus than on Earth. e. Human presence on Earth has led to declining temperatures.
The Collision Hypothesis and Evolutionary Theories are considered to be equally plausible explanations of how planetary systems form
Indicate whether the statement is true or false
A semiconductor with an electrical conductivity of 300 (?·m)-1 at room temperature is produced by doping Group IV silicon with Group V antimony. Assume that the mobility of electrons in silicon is equal to 0.10 m2 /V·s and that the mobility of holes is equal to 0.001 m2 /V·s. You can assume that this semiconductor is in the extrinsic range of operation at this temperature.
(a) What type of semiconductor is this? (b) What doping concentration of antimony in atoms/m3 is necessary for this electrical conductivity? (c) State clearly any assumptions you make in this calculation.
The ground state of the Li++ ion is at (Li has atomic number 3)
A) -40.8 eV. B) -122 eV. C) Li++ does not have a ground state. D) -61 eV. E) -1.51 eV.