An electric dipole is placed in a uniform electric field. which options below are true? [enter your answer as a string of the letter options you believe are correct. for instance, if you think options a, d, and e are correct, then enter "ade"] a) the dipole is never in equilibrium since it will always twist around. b) a dipole whose moment vector is not aligned with a uniform electric field will twist around toward being aligned. c) no net force acts on the electric dipole. d) there are no electric forces exerted on each pole of the dipole. e) none of the above

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet. whats one advantage of using electromagnetic in devices