Some substances have the same chemical composition, but their atoms are arranged differently. a classic example is carbon. a pencil lead is made of graphite, which contains only carbon atoms. a diamond also contains only carbon atoms. however, the carbon atoms in a diamond are packed more closely together. would you expect the density of graphite and a diamond to be the same? explain your answer.

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c

Which of the following is not used to measure wind? oa. psychrometero b. wind socko c. weather vaneo d. anemometer