Spun glass is a relatively
A) good conductor.
B) poor conductor.
C) both about the same
Answer: B
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Each of the four diagrams below shows a hypothetical electric field in a certain region of empty space where the magnetic field is constant in time. 
Which of the fields are physically impossible and why?
A. This field violates Faraday’s law. B. This field violates Gauss’s law. C. This field violates both of the above laws. D. This field is physically possible.
RLC Circuits: In the circuit shown in the figure, the 60-Hz ac source has a voltage amplitude of 120 V, the capacitive reactance is 920 ?, the inductive reactance is 290 ?, and the resistance is 420 ?. What is the rms current in the circuit?
A. 0.11 A B. 0.13 A C. 0.14 A D. 0.17 A E. 0.20 A
Organic molecules are:
A) living cells. B) carbon-based. C) silicon-based. D) found only on Earth. E) not found outside our solar system.
Two identical cylinders at the same pressure contain the same kind of gas and the same number of moles of gas (in other words, the same amount of gas). If one has two times the volume of the other, what can you say about the relative temperatures of the gas within each of the cylinders?
1.The temperature must be the same. 2.The cylinder with the larger volume must have a temperature on an absolute scale that is ½ the temperature of the other. 3.The cylinder with the smaller volume must have a temperature on an absolute scale that is ½ the temperature of the other. 4.It is impossible to tell because the temperatures could be anything.