- #1
goodboy
- 11
- 0
put a iron beside a magnet,then we konw the iron would be attracted toward the magnet.but where does the kinetic energy of the iron come from?
You are now wrong. You were right the first time. For a permanent magnet and ferromagnetic iron, the energy considerations do work just as they would in electrostatics with a charge attractilng a polarizable object.Tomsk said:Actually, I just read this thread: https://www.physicsforums.com/showthread.php?t=130549. Looks like I'm wrong then...:uhh:
The majority of energy on Earth comes from the Sun. Solar energy is converted into various forms, such as heat, wind, and biomass, through processes like photosynthesis and solar panels.
The primary source of energy for the human body is food. Our bodies break down carbohydrates, fats, and proteins from food into glucose, which is then converted into ATP (adenosine triphosphate) to fuel our cells.
In power plants, energy is created through the process of combustion. Fossil fuels, such as coal or natural gas, are burned to produce heat, which then boils water and creates steam. The steam turns a turbine, which generates electricity.
Nuclear energy comes from the splitting of atoms in a process called nuclear fission. This releases a large amount of heat, which is used to generate steam and power turbines to produce electricity.
Energy is essential for all processes in the universe. It powers the movement of celestial bodies, the growth of plants and animals, and the functioning of machines. The total amount of energy in the universe is constant, but it can be converted into different forms.