Diamond and graphite contain only carbon atoms, yet they are very different objects with very different properties. Why are diamond and graphite different? A.
Their subatomic particles are different.
B.
They contain different atoms.
C.
Their atoms are arranged differently.
D.
They contain different elements.

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.