Dear Parents – Teachers :
Without any doubt , getting your children / students to take
Ø Self-generated MOCK TESTS ( NEET – JEE – CET – Standards 9th to 12th )
Ø Teacher-generated online-offline REAL EXAMS ( for Standards 9th to 12th )
- is a very valuable ( FREE ) service of www.My-Teacher.in
But , the service of greatest value is to make them ;
Ø Think and ask “ Out of Box “ questions
Ø Curious – Inquiring – Creative
Just once – only once - motivate your children / students , to ask questions of the type shown below
Let them access www.My-Teacher.in ( Questions Beyond Syllabus ) on their MOBILES
Caution :
They may stop using Facebook – X – Instagram !
25 Jan 2025
My Question :
“ In terms of generating energy from fuel and then using it to do work , are human body and internal combustion engine, comparable ? If yes , how does a body manage to produce energy despite a very small temperature difference between the ambient temperature and the body temperature , as compared to an IC Engine ? “
www.My-Teacher.in ( Questions Beyond Syllabus ) replied :
“ Yes, the human body and an internal combustion engine are comparable in terms of generating energy from fuel and then using it to do work. Both systems convert chemical energy into usable forms of energy, albeit through different mechanisms.
In an internal combustion engine, fuel combusts at high temperatures, creating a significant temperature difference that drives mechanical work through expansion and movement of pistons or turbines.
The human body operates differently. It converts chemical energy from food into ATP (adenosine triphosphate) through metabolic processes involving enzymes in a series of biochemical reactions known as cellular respiration. This process occurs at body temperature, which is much closer to ambient temperature compared to the high temperatures in combustion engines.
Despite this small temperature difference between the body's internal environment and its surroundings, the human body efficiently produces energy due to the highly controlled enzymatic reactions that facilitate direct conversion of chemical energy into ATP without needing a large thermal gradient. This ATP then powers various biological functions such as muscle contraction, nerve transmission, and other cellular activities essential for life. “
My Question :
“ Say you are stranded alone on a deserted island wearing nothing other than your clothes and your eye glasses. Your task is to set in motion, a process of civilization. Without any tools whatsoever, how will you begin this process ? What could be the very first tool that you would need to construct and how would you go about constructing such a tool ? “
www.My-Teacher.in replied :
“ Stranded alone on a deserted island, the very first tool I would need to construct is likely a sharp cutting instrument, such as a knife or an axe. This basic tool would be essential for numerous survival tasks including gathering and preparing food, constructing shelter, and making other tools.
To create this initial tool without any existing tools, I'd start by searching the island for suitable materials. Ideally, I would look for flint or obsidian rocks that can be knapped (shaped by striking) into sharp edges. If these types of stones aren't available, finding a hard stone to use as a hammerstone and another softer rock which can be fractured into sharper pieces could work.
The process involves striking the edge of the softer rock with the harder one at an acute angle to chip off flakes. These flakes can then be sharpened further by carefully applying pressure along their edges using wood or bone implements. The goal is to produce one end that is pointed and edged enough to cut through material like wood or plant fibers.
This rudimentary cutting tool will not only aid in immediate survival needs but also set the foundation for creating more complex tools and eventually developing a small civilization on the island through gradual innovation and resource utilization. “
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