How does the object distance (do) of a convex lens compare with the object distance of a concave lens? A. Both are negative. B. Both are positive. C. The object distance of the convex lens is negative, and that of the concave lens is positive. D. The object distance of the convex lens is positive, and that of the concave lens is negative.

Zirconium has an hcp crystal structure and a density of 6.51 g/cm3. (a) what is the volume of its unit cell in m3? (b) if the c/a ratio is 1.593, compute the values of c and a.

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.

Apossible explanation for a set of facts that can be tested by further investigation is called