If you found a sedimentary layer with a diverse fossil assemblage including phacops, mucrospirifer, chonetes, and amphibians all in the same layer, what geologic period would you assign it to? what is the range for its absolute age?

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel

Write a hypothesis about the effect of increasing resistance on the current in the circuit. use theformat and be sure to answer the lesson question. “how do changes in voltage or resistance affect current in an electric circuit? ”

Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class