Why is there a danger of explosion in places like coal mines where there are large quantities of powdered, combustible materials?

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.

Determine the ph of 0.10 m nh3 solution. nh3 is a weak base with a kb equal to 1.8 x 10-5 round answer to nearest whole number.

Why is it possible for different microorganisms to extract energy not only from carbohydrates and other biological molecules but from a large variety of substances?