Jon is a scientist researching the heat value of coal. which heat measurement should he use?

calories , joules and calorific value.

Explanation:

All fuels that produces some amount of energy on burning in the presence of oxygen. This energy is measured in terms of calories , joules or calorific value.

1 calorific value is the amount of energy produced when one unit weight of coal is burnt in oxygen.  

The calorific value is expressed in terms of  joules per kilogram

ι вєℓινє тнє αиѕωєя тσ уσυя qυєѕтισи ιѕ в. ℓуѕσѕσмє

ι нσρє тнαт ι ¢συℓ∂ нєℓρ уσυ.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .