What is the main idea throughout this article?

A. How to avoid getting electrocuted in a mine

B. The advantages of being a coal

miner

C. The reasons why coal is a valuable energy resource

D. The dangers of mining for coal

©Kesle

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays

Why is the bottom layer of a trophic pyrimid the