In the image above, the girl is using her arm to lift a weight. Her arm is acting as a .
A.
wedge
B.
pulley
C.
lever
D.
wheel and axle

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Express the following number in scientific notation. 0.026890 =

Liv sheldon given the balanced equation for an organic reaction: c2h2 + 2cl2 → c2h2cl4 this reaction is best classified as *