Compare and contrast the flow of energy and matter in photic and aphotic zones. How are they similar, and how are they
different?

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13

Which of these statements is false? a. others may notice a problem with a relationship before the people involved. b. the first sign of a problem with a relationship is a feeling of anger. c. damaged relationships can be repaired. d. even good relationships can be damaged.