Which of the following statements best describes the energy transformation that occurs when a log burns? mechanical energy changes to heat and light energy. chemical energy changes to heat and light energy. heat and light energy changes to chemical energy. mechanical energy changes to chemical energy.

Chemical energy changes to light and heat energy.

Explanation:

The energy that is found in the wooden log is the chemical energy which is found in the bonds of carbon.

When the wooden log is burnt, the bonds are broken and the energy is converted in the form of light and heat. This is the conversion of chemical energy into heat energy and light energy.

This is also known as combustion in which a hydrocarbon is burnt to produce light and heat and carbon dioxide is released during the process.

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.