In which of the following situations do your arms do work on books in the sense of definition of work?
A Holding a heavy stack of books while standing
B. Carrying a heavy stack of books
C Dropping a stack of books onto a table
D. Picking up a pile of books from the floor

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

Which describes increasing the efficiency of energy resource