The activation energy is the energy that must be supplied so that molecules are able to interact with each other in a chemical reaction. True or false.

Activation energy is the energy required for a reaction to occur, and determines its rate.

Explanation:

True i think

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

you know that this symptom is misleading and quite often is related to: heart attack

a heart attack is a condition that occurs when the blood flow that transports oxygen to the heart muscle is damaged or cut off completely. the coronary arteries that supply the heart muscle with blood flow can be blocked by the accumulation of plaque. also, when the plaque within the heart artery breaks, it creates blood clot that can also hinder the blood flow. men that are over 45years of age and women that are over 55years of age are at risk of having a heart attack. the symptoms of a heart attack include chest discomfort, chest pain, coughing, and shortness of breath.