А B
W
Figure 21-36 shows four
identical conducting spheres that are
actually well separated from one an-
other. Sphere W (with an initial
charge of zero) is touched to sphere Fig. 21-36 Problem 38.
A and then they are separated. Next, sphere W is touched to sphere
B (with an initial charge of -32e) and then they are separated.
Finally, sphere W is touched to sphere C (with an initial charge of
+48c). and then they are separated. The final charge on sphere W is
+ 18c. What was the initial charge on sphere .1?

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin. answer in one word. part bfind e(r), the magnitude of the electric field at distance r from the point charge q. express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q. express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r

The process of predicting values that extend beyond the range of data points is called absolute value extrapolation interpolation prediction for any given: )