While on a train, you are holding a string with a ball attached to it. at first, the train’s velocity is constant and the string is vertical (the ball hangs straight down). when the train changes direction, while going around a curve with a radius of 300 m, you measure the angle between the string and the vertical to be 35.0 degrees. the ball has a mass of 1.20 kg, and we will use g = 10 n/kg. (a) the speed of the train is constant during this time. what is that speed?
m/s

(b) what is the tension in the string while the train is going around the curve?
n

Which levels of government establish and implement educational requirements for minors

A58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move toward third base with a velocity of 38.0 m/s.

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0