The ultimate source of energy from fossil fuels is the
A) Sun.
B) radioactivity in Earth's interior.
C) photosynthesis process.
D) natural processes in Earth's interior.
Answer: A
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A transistor is an example of a
A) resistor. B) superconductor. C) semiconductor. D) dry cell. E) transmitter.
If all the "dark matter" in the Universe were to be, somehow, instantaneously removed, which of the following would not happen?
A) The Solar System would fly apart. B) The Milky Way would fly apart. C) Clusters of galaxies would fly apart. D) The Universe would expand forever. E) all of the above
LC Circuits: A simple series circuit consists of just a 3.4-µF capacitor and an 80-mH inductor, with no appreciable resistance. At t = 0 the capacitor has charge 5.4 µC and the current in the inductor is zero.(a) How long after t = 0 will the current in the circuit be maximum?(b) What will be this maximum current?
What will be an ideal response?
Points A [at (2, 3) m] and B [at (5, 7) m] are in a region where the electric field is uniform and given by 
N/C. What is the potential difference VA?VB?
A. 33 V B. 27 V C. 30 V D. 24 V E. 11 V