Search results
Results from the WOW.Com Content Network
When the fire involves burning metals like lithium, magnesium, titanium, [6] etc. (known as a class-D fire), it becomes even more important to consider the energy release. Because the metals react faster with water than with oxygen and thereby more energy is released, putting water on such a fire results in the fire getting hotter or even ...
Heraclitus regarded the soul as being a mixture of fire and water, with fire being the more noble part and water the ignoble aspect. He believed the goal of the soul is to be rid of water and become pure fire: the dry soul is the best and it is worldly pleasures that make the soul "moist". [ 7 ]
Chemical reactions such as combustion in fire, fermentation and the reduction of ores to metals were known since antiquity. Initial theories of transformation of materials were developed by Greek philosophers, such as the Four-Element Theory of Empedocles stating that any substance is composed of the four basic elements – fire, water, air and ...
Together, these five essences of the deity correlate with the five classical elements. [38] [39] Koni is the thought and void (aether). Bemba (also called Pemba) is the god of the sky and air. Nyale (also called Koroni Koundyé) is the goddess of fire. Faro is the androgynous god of water. Ndomadyiri is the god and master of the earth.
Empedocles (c. 490–430 BCE) spoke of four elements of which everything was made: earth, water, air, and fire. [69] Meanwhile, Parmenides argued that change does not exist, and Democritus argued that everything is composed of minuscule, inert bodies of all shapes called atoms, a philosophy called atomism. All of these notions had deep ...
The creation of sparks from metals is based on the pyrophoricity of small metal particles, and pyrophoric alloys are made for this purpose. [2] Practical applications include the sparking mechanisms in lighters and various toys, using ferrocerium; starting fires without matches, using a firesteel; the flintlock mechanism in firearms; and spark testing ferrous metals.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
It's an impure substance made up of 2 or more elements or compounds mechanically mixed together in any proportion. [1] A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions or colloids. [2] [3]