Analyzing an Example of the Interaction of Spheres Try it
Which of the spheres interact in the formation of coal?
Check all that apply.
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Read the paragraph, and then answer the question.
Coal is a black, hard substance formed from the remains
of living things that existed a long time ago. The remains
were buried and exposed to pressure and temperature
underneath Earth's surface. Over time, these remains solidified.

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

What properties of a moving object are used in determining the object's energy of motion

The second largest public utility in the nation is the sole provider of electricity in 32 counties of southern florida. to meet the monthly demand for electricity in these counties, which is given by the inverse demand function p = 1,200 – 4q, the utility company has set up two electric generating facilities: q1 kilowatts are produced at facility 1, and q2 kilowatts are produced at facility 2 (so q = q1 + q2). the costs of producing electricity at each facility are given by c1(q1) = 8,000 + 6q12 and c2(q2) = 6,000 + 3q22, respectively. determine the profit-maximizing amounts of electricity to produce at the two facilities, the optimal price, and the utility company’s profit