Time The flow of sand in an hourglass can be used to keep track of elapsed time. It also concretely represents the present as being between the past and the future. Time is a dimension in which events can be ordered from the past through the present into the future,[1][2][3][4][5][6] and also the measure of durations of events and the intervals between them.[3][7][8] Time has long been a major subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars.[3][7][8][9][10][11] Nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems.[12][13][14] Some simple, relatively uncontroversial definitions of time include "time is what clocks measure"[7][15] and "time is what keeps everything from happening at once".[16][17][18][19] Temporal measurement and history[edit] World time[edit]
Are We Really All Made of Stars? | Cosmos, Moby’s Song ‘We Are All Made of Stars’, Universe & Solar System | Life's Little Mysteries The theory that everyone and everything on Earth contains minuscule star particles dates back further than Moby's popular 2002 song "We Are All Made of Stars." In the early 1980s, astronomer Carl Sagan hosted and narrated a 13-part television series called "Cosmos" that aired on PBS. On the show, Sagan thoroughly explained many science-related topics, including Earth's history, evolution, the origin of life and the solar system. "We are a way for the universe to know itself. Some part of our being knows this is where we came from. His statement sums up the fact that the carbon, nitrogen and oxygen atoms in our bodies, as well as atoms of all other heavy elements, were created in previous generations of stars over 4.5 billion years ago. "All organic matter containing carbon was produced originally in stars," Impey told Life's Little Mysteries. How star stuff got to Earth When it has exhausted its supply of hydrogen, it can die in a violent explostion, called a nova. Cosmic connections
History Those who cannot remember the past are condemned to repeat it.[1] History (from Greek ἱστορία, historia, meaning "inquiry, knowledge acquired by investigation")[2] is the study of the past, particularly how it relates to humans.[3][4] It is an umbrella term that relates to past events as well as the memory, discovery, collection, organization, presentation, and interpretation of information about these events. Scholars who write about history are called historians. History can also refer to the academic discipline which uses a narrative to examine and analyse a sequence of past events, and objectively determine the patterns of cause and effect that determine them.[5][6] Historians sometimes debate the nature of history and its usefulness by discussing the study of the discipline as an end in itself and as a way of providing "perspective" on the problems of the present.[5][7][8][9] Etymology Ancient Greek ἱστορία[12] (historía) means "inquiry","knowledge from inquiry", or "judge".
What Is Caustic Soda and Where Can You Get It? Key Takeaways: Caustic Soda Caustic soda is one of the common names for sodium hydroxide (NaOH).It is also known as lye, although lye may refer to either potassium hydroxide or sodium hydroxide.Pure caustic soda is sold for making candles or soap.Impure caustic soda is found in drain cleaner.Because lye is used to make illegal drugs, it's harder to buy large quantities than in the past. However, small containers are available in stores and online. Uses of Caustic Soda or Lye Lye is used for soap making, candle making, homemade biodiesel, frosting glass, making several foods, and for chemistry experiments. How To Get Caustic Soda or Lye It's much harder to get hold of lye than it used to be in the past. drain cleaner (check the label) - e.g., Roebic Crystal Drain Cleaner, sold as Lowessodium hydroxide from an online chemical supply storesoap making storecandle making storebiodiesel supply store Helpful Tips Since it's relatively hard to get hold of this chemical, you may need to buy in bulk.
Information The ASCII codes for the word "Wikipedia" represented in binary, the numeral system most commonly used for encoding textual computer information In Thermodynamics, information is any kind of event that affects the state of a dynamic system that can interpret the information. Etymology[edit] The English word was apparently derived from the Latin stem (information-) of the nominative (informatio): this noun is derived from the verb informare (to inform) in the sense of "to give form to the mind", "to discipline", "instruct", "teach". Inform itself comes (via French informer) from the Latin verb informare, which means to give form, or to form an idea of. Furthermore, Latin itself already contained the word informatio meaning concept or idea, but the extent to which this may have influenced the development of the word information in English is not clear. Information theory approach[edit] As sensory input[edit] Often information can be viewed as a type of input to an organism or system.
Mulungu Bark and Mulungu Powder Mulungu Mulungu is a medium-sized, well-branched tree that grows 10-14 m high. It produces many pretty, reddish-orange flowers (pollinated by hummingbirds) at the ends of the tree's many branches. Several Erythrina tree species are used by indigenous peoples in the Amazon as medicines, insecticides, and fish poisons. In both North and South American herbal medicine, Mulungu is considered to be an excellent sedative to calm agitation and nervous coughs and to treat other nervous system problems including insomnia and anxiety. Mulungu is not very widely known or used in North America; mostly appearing as an ingredient in only a few herbal formulas for anxiety or depression.
Knowledge Knowledge acquisition involves complex cognitive processes: perception, communication, and reasoning; while knowledge is also said to be related to the capacity of acknowledgment in human beings.[2] Theories of knowledge[edit] In contrast to this approach, Wittgenstein observed, following Moore's paradox, that one can say "He believes it, but it isn't so," but not "He knows it, but it isn't so." [5] He goes on to argue that these do not correspond to distinct mental states, but rather to distinct ways of talking about conviction. What is different here is not the mental state of the speaker, but the activity in which they are engaged. For example, on this account, to know that the kettle is boiling is not to be in a particular state of mind, but to perform a particular task with the statement that the kettle is boiling. Communicating knowledge[edit] Symbolic representations can be used to indicate meaning and can be thought of as a dynamic process. Situated knowledge[edit]
Composition of the human body The main elements that compose the human body are shown from most abundant (by mass) to least abundant. The elemental composition of the human body can be looked at from the point of view of either mass composition, or atomic composition. To illustrate both views, the adult male human body is approximately 57% water, and water is 11% hydrogen by mass but 67% by count of atoms (i.e. 67 atomic percent). Thus, most of the mass of the human body is oxygen, but most of the atoms in the human body are hydrogen atoms. Both mass-composition and atomic composition figures are given below (see pie graphs and table). Body composition may also be analyzed in terms of molecular type (e.g., water, protein, connective tissue, fats (or lipids) apatite (in bones), carbohydrates (such as glycogen and glucose) and DNA. Major, minor and trace elements[edit] Pie charts of typical human body composition by percent of mass, and by percent of atomic composition (atomic percent). Elemental composition list[edit]
Sense Five senses and the respective sensory organs An allegory of five senses. Still Life by Pieter Claesz, 1623. The painting illustrates the senses through musical instruments, a compass, a book, food and drink, a mirror, incense and an open perfume bottle. A sense is a physiological capacity of organisms that provides data for perception. Humans have a multitude of senses. Definition[edit] A broadly acceptable definition of a sense would be "A system that consists of a group of sensory cell types that responds to a specific physical phenomenon, and that corresponds to a particular group of regions within the brain where the signals are received and interpreted." The senses are frequently divided into exteroceptive and interoceptive: Exteroceptive senses are senses that perceive the body's own position, motion, and state, known as proprioceptive senses. Non-human animals may possess senses that are absent in humans, such as electroreception and detection of polarized light. Sight[edit]
Organism Prokaryotes are represented by two separate domains, the Bacteria and Archaea. Etymology[edit] The term "organism" (from Greek ὀργανισμός, organismos, from ὄργανον, organon, i.e. "instrument, implement, tool, organ of sense or apprehension"[3][4]) first appeared in the English language in 1703 and took on its current definition by 1834 (Oxford English Dictionary). It is directly related to the term "organization". There has been a great deal of recent controversy about the best way to define the organism[6][7][8][9][10][11][12][13] and indeed about whether or not such a definition is necessary.[14][15] Several contributions[16] are responses to the suggestion that the category of "organism" may well not be adequate in biology.[17] Semantics[edit] The word organism may broadly be defined as an assembly of molecules functioning as a more or less stable whole that exhibits the properties of life. Non-cellular life[edit] Organizational terminology[edit] Chemistry[edit] Macromolecules[edit]