A series LR circuit includes a 9.0 V battery, a resistance of 0.50 
and an inductance of 0.80 H. What is the induced emf 2.0 s after the switch has been closed?
A. 0.0
B. 9.0 V
C. 5.2 V
D. 2.6 V
E. 19 mV
D. 2.6 V
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Which of the following is not considered a cost of production?
(a) Research and development (b) Design (c) Materials (d) Liability
What does it mean to say that electrons are not point particles, but rather wavelike?
What will be an ideal response?
The very first generation of star systems in the universe must have been born from gas that consisted entirely of hydrogen and helium (and no other elements). Which of the following statements is most likely to have been true about these first-generation star systems?
A) They had terrestrial planets but no jovian planets. B) They did not have any planets or asteroids or comets. C) They had asteroids and comets but no large planets. D) They did not have and disks of gas around them as they formed.
Fraunhofer lines are apparent in
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