When riding a 10-speed bicycle up a hill, a cyclist shifts the chain to a larger-diameter gear attached to the back wheel. why is this gear preferred to a smaller gear? a. the torque exerted by the chain on the gear is larger. b. the force exerted by the chain on the gear is larger. c. you pedal more frequently to travel the same distance. d. both a and c are correct.
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Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.
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When riding a 10-speed bicycle up a hill, a cyclist shifts the chain to a larger-diameter gear attac...
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