A circular coil with a diameter of 100 mm, which is at the same plane as the one of the sheet, conducts a current of 6A counterclockwise. The coil is immersed in a material of relative permeability of 2.5. Find the magnitude of the magnetic induction,
a) at the center of the coil and
b) 3 cm away in the center axis.

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

If element x has 99 protons how many electrons does it have

What property of an object determines its inertia?