Which of the following statements is true?

A. Thin wedges need more effort than thick wedges to do work.
B. Second-class and third-class screws have very wide threads.
C. In a second-class lever, the load is between the fulcrum and the effort.
D. All of the above.

by drinking easy

very easy

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)