A square, flat loop of wire is pulled at constant velocity through a region of uniform magnetic field directed perpendicular to the plane of the loop as shown in Figure OQ31.5. Is current induced in the loop?
3
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Which of these, if used to replace gasoline as an automobile fuel, would not contribute to global warming?
A) Synthetic gasoline made from coal B) Electricity from a nuclear power plant C) Electricity from a coal-burning plant D) All of the above would contribute to global warming. E) None of the above would contribute to global warming.
Which of the following species is the reducing agent?
2 CuBr ? 2Cu + Br2 A) Cu B) CuBr C) Cu+ D) Br- E) Br2
A satellite that weighs 4900 N on the launchpad travels around the earth's equator in a circular orbit with a period of 1.667 h. The earth's mass is 5.97 × 1024 kg, its equatorial radius is 6.3 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2
(a) Calculate the magnitude of the earth's gravitational force on the satellite. (b) Determine the altitude of the satellite above the Earth's SURFACE. What will be an ideal response?
Lightning that illuminates clouds with flickering flashes is called
a. heat lightning. b. flash lightning. c. ball lightning. d. bolt lightning.