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Which of the following are scalar quantities? force and time B. mass and time C. torque and moment of inertia . work and mass E. two of the above 41. Moving magnets through a loop can induce an electric current. A. true B. false C. cannot determine D. none of the above 42. Electrical insulators are A. any material with electrons B. any non-metals C. metals 43. Which of the following situations is impossible? A) An object has velocity directed east and acceleration directed west. B) An object has constant non-zero acceleration and changing velocity. C) An object has constant non-zero velocity and changing acceleration. D) An object has velocity directed east and acceleration directed east. E) An object has zero velocity but non-zero acceleration 44. Given two long (L=1m) parallel wires separated by a distance of 2 cm. Each wire carries 0.5 A in opposite directions. The two wires 1=0.5A 1=0.5A A. exert attractive magnetic forces B. exert repulsive magnetic forces C. exert zero magnetic forces . none of the above