The force f = 3xi +27 n moves an object from an origin to a point given by the position vector s = 4i + m. the work done by the force is: a) 14 j b) 26 j c) 25 j d) 12 j e) 13 j.

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J. j. thomson’s experiment disproved the theory that an atom

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.