The Second Law of Thermodynamics The Second Law of Thermodynamics has several variations. One version says that some heat is always wasted when converting heat into mechanical energy. In other words all heat can not be completely converted into mechanical energy. Another states that heat normally flows from high to low temperatures. So why do hot cups cool off, well the answer lies in the fact that the universe is expanding. Say the universe started …showed first 75 words of 751 total…

…showed last 75 words of 751 total…go towards disorder, and move towards order then the universe would began to go back in time. This as we know it might be the end of human or for that matter life all together to stop. Reversed time can not support life. So when you see the glass be put back together and lifted onto the table next to you after you have just knocked it off, you know what is about to happen.