I NEED HELP WITH THIS. PLEASE BE QUICK, IM BEING TIMED!! I WILL GIVE 15 POINTS, PLEASE ANSWER TO HELP, IF NOT I WILL REPORT. Conservation of mechanical energy is defined as

A. The sum of the kinetic and potential energies of an object remains a constant value unless there are forces acting on the object that cause a loss of energy overall, such as friction and air resistance.

B. Potential energy added to kinetic energy

C. Energy of motion

D. Law of conservation of energy

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.