Final answer:
Machines require fuels like gasoline instead of biological nutrients like fat and meat that humans and animals use. Gasoline is used for its chemical energy, which is converted into mechanical energy in the engines of vehicles, unlike the metabolic process that converts fats into ATP in living organisms.
Step-by-step explanation:
Unlike biological organisms which use fat and meat (carbohydrates, lipids, and proteins) for energy, machines require different forms of energy sources such as gasoline or other fuels. For example, a vehicle cannot run on the same energy sources as humans and animals; it needs fuel that can be burned to produce mechanical energy. Foods like fats and meat provide energy for humans through metabolic processes that break down these nutrients into molecules that can be converted to ATP, an energy currency for our cells. In contrast, machines like cars convert the chemical energy in gasoline into kinetic energy to power their engines and run.
One of the most common liquid fuels used by machines is gasoline, a nonrenewable fossil fuel, which powers the engines of many vehicles. Other alternatives include ethanol, which can be made from corn and other plants, fuel cells that convert hydrogen and oxygen into electricity, or battery-powered systems like the Tesla Powerwall. However, substances like fat and meat cannot directly power these systems as they do living organisms; instead, they serve as an energy source for humans and animals by being metabolized into ATP. While the biochemical pathways are complex, the principle remains simple: living organisms and machines require different forms of energy to function.