The vector position of an object is given by r what is the torque acting on the object about the origin when a force f = (−12.5i hat) n acts on it? express your answer using unit vector notation.

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

In the 1980's, congress authorized the u.s. department of energy to build the wipp facility in the chicuahuan desert in new mexico. what is the purpose of wipp?