13. What is the total mechanical energy of a penny dropped off of the top of the Empire State Building if it has a potential energy of 47 J, and a kinetic energy of 23 J? A. 24 J

B. 70 J

C. 667 J

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

Which of the following list the divisions of the geologic time scale in order from longest to shortest