Why is coal costly to produce?

1. coal is found deep underground.

2. Coal is expensive to make

3. Coal is only found in certain places on earth.

4. Coal is difficult to make in the lab.

Which behavior is appropriate in the laboratory? handling broken glass with bare hands touching an object to see if it is hot reaching over an open flame disposing of hazardous waste in a labeled container

Solve the following system by any method 2x - 6y = 24 ... - 5x + 6y = - 6 ... A. (0,-6) B. (4,-1) C. (-6,-6) D. (6,-1)

Why is base current not affected by collector current?

Technician a says multiple discharge ignition system fires the spark plug during each of the engine's four cycle strokes.

Like kinds of magnetic poles repel while unlike kinds of magnetic poles

What is a compound? a poly element pure substance a homogenous mixture a single element pure substance a heterogeneous mixture

Venn diagrams are used for comparing and contrasting topics. The overlapping sections show characteristics that the topics have in common, and the sections that are unique to each topic show the characteristics that apply to only that topic.

Each of two identical objects carries a net charge. The objects are made from conducting material. One of them is attracted to a positively charged ebonite rod, and the other is repelled by the rod.

Como calcular massa volume e densidade?

What would most likely happen if the power lines in a petroleum power plant were broken? a. The petroleum would not burn. b. Steam would not be produced. c. Customers would not receive electricity. d. Energy would not be converted.