Athick spherical shell (centered at the origin, inner radius r, outer radius 2r) carries a volume charge distribution p(r) = k/r, where k is a negative constant. a. use coulomb's law to write an integral expression for the electric field at an arbitrary point on the x-axis (x, 0, 0). b. use gauss's law to find expressions for the electric field in all regions of space. c. graph the x-component of the electric field as a function of position along the x- axis.

Galileo was the first to notice that the moon has craters, valleys, and mountains. how might this have changed people's perception of the moon at the time?

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest