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42. Electrical conductors are A. any material with electrons B. any non-metals C. metals 43. Which of the following are vector quantities? A. speed and time B. velocity and mass C. torque and force D. work and energy E. two of the above 44. Which of the following are scalar quantities? A. force and time B. mass and time C. torque and moment of inertia D. work and mass E. two of the above 45. Moving magnets through a loop can induce an electric current. A. true B. false C. insufficient information - cannot determine D. none of the above 46. Electrical insulators are A. any material with electrons B. any non-metals C. metals 47. 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