A straight wire (length = 8.0 m) is bent to form a square. If the wire carries a current of 20 A, what is the magnitude of the magnetic field at the center of the square?
A. 17 ?T
B. 14 ?T
C. 11 ?T
D. 20 ?T
E. 36 ?T
Answer: C
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Energy and Mass: If a typical city consumes electrical energy at a rate of 2.0 GW, how many kilograms of matter would have to be converted entirely into electrical energy in order to keep this city running for 14 weeks? (c = 3.0 × 108 m/s)
A. 0.19 kg B. 0.21 kg C. 0.26 kg D. 0.32 kg
Answer the following statement(s) true (T) or false (F)
Bell’s theorem shows that quantum theory contradicts any “hidden variable theory” that presumes that a quanton has objectively real properties
Which of the following is a consequence of Heisenberg's uncertainty principle?
A) The unpredictability of radioactive decay. B) The uncertainties involved in determining a person's genetic inheritance when DNA molecules are combined. C) The fact that atoms don't collapse. D) All of the above. E) None of the above.
Calculate the kinetic energy (in eV) of a nonrelativistic neutron that has a de Broglie wavelength of 9.9 × 10-12 m. (h = 6.626 × 10-34 J • s, mneutron = 1.675 × 10-27 kg, 1 eV = 1.60 × 10-19 J)
What will be an ideal response?