a wire of length 10cm carrying a current lies at right angle to a magnetic field of flux density 5 milli tesla. if 10,^18 electrons pass a point in the wire each second, determine the current flowing in the wire and the force acting on it (q electron= 1.6×10^-19)

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.