Marcel is his two children, jacquesand gilles, to balance on a seesaw so that they will be able tomake it tilt back and forth without the heavier child, jacques, simply sinking to the ground. given that jacques, whose weight isw, is sitting at distance l to the left of the pivot, at what distance l_1 should marcel place gilles, whose weight is w, to the right of the pivot to balance the seesaw?
express your answer in terms ofl, w, and w.

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s