The equations below describe the motion of a falling body, assuming that the acceleration due to gravity is a constant, g (in which case Newton's law of gravitation simplifies to F = mg where m is the mass of the earth). This assumption is reasonable for objects falling to earth over the relatively short vertical distances of our everyday experience, but is very much untrue over larger distances (such as spacecraft trajectories). Galileo was the first to demonstrate and then formulate these equations. He used a ra ...

See also:

Gravity, Gravity - Overview of the history of gravitational theory, Gravity - The Earth's gravity, Gravity - Comparative gravities of the Earth Sun Moon and planets, Gravity - Mathematical equations for a falling body, Gravity - Gravitational potential, Gravity - Acceleration relative to the rotating Earth, Gravity - Gravity and astronomy, Gravity - Self-gravitating system, Gravity - Practical uses of gravity, Gravity - Newton's law of universal gravitation, Gravity - Acceleration due to gravity, Gravity - Bodies with spatial extent, Gravity - Vector form, Gravity - Gravitational field, Gravity - Problems with Newton's theory, Gravity - Theoretical concerns, Gravity - Disagreement with observation, Gravity - Newton's reservations, Gravity - Einstein's theory of gravitation, Gravity - Experimental tests, Gravity - Comparison with electromagnetic force, Gravity - Gravity and quantum mechanics, Gravity - Alternative theories, Gravity - Recent alternative theories, Gravity - Historical alternative theories, Gravity - Notes

Read more here: » Gravity: Encyclopedia II - Gravity - Mathematical equations for a falling body

This article is about the Abrahamic belief; creationism can also refer to origin beliefs in general or, centuries earlier, to an alternative to traducianism. Creationism or creation theology is the belief that humans, life, the Earth, and the universe were created by a supreme being or deity's supernatural intervention. The intervention may be seen either as an act of creation from nothing (ex nihilo) ...

Including:

• Creationism - Overview
• Creationism - Political context
• Creationism - History of the concept of creation
• Creationism - Types of creationism
• Creationism - Jewish creationism
• Creationism - Christian God as absolute origin
• Creationism - Prevalence of creationism
• Creationism - United States
• Creationism - The western world outside the United States
• Creationism - Criticism of creationism
• Creationism - Scientific critique of creationism
• Creationism - The Christian critique of creationism
• Creationism - Creationism and naturalism

Read more here: » Creationism: Encyclopedia - Creationism

Wireless energy transfer is the transfer of electromagnetic energy for power to do work via conduction and/or induction without a physical connection. Wireless energy transfer - Description. Wireless energy transfer, by definition, does not require direct electrical conductive contacts. Various systems work by transmitting electromagnetic energy from an external power source through a medium by running a large AC current through an external coil to generate a magnetic flux. The changing magnetic flux induce ...

Including:

• Wireless energy transfer - Description
• Wireless energy transfer - History
• Wireless energy transfer - Uses
• Wireless energy transfer - Related patents
• Wireless energy transfer - External articles references and further reading

Read more here: » Wireless energy transfer: Encyclopedia - Wireless energy transfer

Some life scientists and earth scientists use biosphere in a more limited sense. For example, geochemists define the biosphere as being the total sum of living organisms (the "biomass" or "biota" as referred to by biologists and ecologists). In this sense, the biosphere is but one of four separate components of the geochemical model, the other three being lithosphere, hydrosphere, and atmosphere. The meaning used by geochemists is one of the consequences of specialization in modern science. Some might prefer the word ecosphere, coined in the 1960s, as all encompassing of both b ...

See also:

Biosphere, Biosphere - Explanation, Biosphere - Origin of term, Biosphere - Narrow definintion, Biosphere - Earth's biosphere, Biosphere - Biosphere 1 Biosphere 2 Biosphere 3, Biosphere - Biosphere 1, Biosphere - Extent of the earth's biosphere

Read more here: » Biosphere: Encyclopedia II - Biosphere - Narrow definintion

A rainforest is a forested biome with high annual rainfall. Tropical rainforests arise due to the Intertropical Convergence Zone, but temperate rainforests also exist. As well as prodigious rainfall, many rainforests are characterized by a high number of resident species and tremendous biodiversity. The largest tropical rainforests exist in the Amazon basin (the Amazon Rainforest), in Nicaragua (Los Guatuzos, Bosawás and Indio-Maiz), in much of equatorial Africa from Cameroon to the Democratic Republic of Congo, in much of sou ...

Including:

• Rainforest - Characteristics
• Rainforest - Trees
• Rainforest - The canopy
• Rainforest - The rainforest as a source of drugs
• Rainforest - Degradation of the rainforests
• Rainforest - Bibliography

Read more here: » Rainforest: Encyclopedia - Rainforest

A forest is an area with a high density of trees (or, historically, a wooded area set aside for hunting). These plant communities cover large areas of the globe and function as carbon dioxide sinks, animal habitats, hydrologic flow modulators, and soil conservers, constituting one of the most important aspects of the Earth's biosphere. Forests can be found in all regions capable of sustaining tree growth, at altitudes up to the tree-line, except where natural fire frequency is too high, or where the tree growing environment has ...

Including:

• Forest - Classification
• Forest - Forest management
• Forest - General
• Forest - Activities related to forest
• Forest - Forests by country
• Forest - Lists

Read more here: » Forest: Encyclopedia - Forest

Biodiversity or biological diversity is the diversity of and in living nature. There are a number of definitions and measures of biodiversity. Biodiversity - Etymology. Biodiversity is a neologism and a portmanteau word, from bio and diversity. The term biological diversity was coined by Thomas Lovejoy in 1980, while the word biodiversity itself was coined by the entomologist E. O. Wilson in 1986, in a report for the first American Forum on biological diversity organized b ...

Including:

• Biodiversity - Etymology
• Biodiversity - Biodiversity definitions
• Biodiversity - Origin of life and biodiversity evolution
• Biodiversity - Benefits of biodiversity
• Biodiversity - Ecological role of biodiversity
• Biodiversity - Economic role of biodiversity
• Biodiversity - Ethical role of biodiversity
• Biodiversity - Scientific role of biodiversity
• Biodiversity - Evaluation of biodiversity
• Biodiversity - Measurement of biodiversity
• Biodiversity - Biodiversity: time and space
• Biodiversity - Species inventory
• Biodiversity - Hotspots of biodiversity
• Biodiversity - Threats to biodiversity
• Biodiversity - Biodiversity management: conservation preservation and protection
• Biodiversity - Juridical status of biological diversity
• Biodiversity - Biodiversity and size bias
• Biodiversity - Quotes from Sean Nee
• Biodiversity - Measures of biodiversity

Read more here: » Biodiversity: Encyclopedia - Biodiversity

An earthquake is a sudden and sometimes catastrophic movement of a part of the Earth's surface. Earthquakes result from the dynamic release of elastic strain energy that radiates seismic waves. Earthquakes typically result from the movement of faults, planar zones of deformation within the Earth's upper crust. The word earthquake is also widely used to indicate the source region itself. The Earth's lithosphere is a patch work of plates in slow but constant motion (see plate tectonics). Earthquakes occur where the stress resulting from ...

Including:

• Earthquake - Characteristics
• Earthquake - Earthquake Size
• Earthquake - Causes
• Earthquake - Preparation for earthquakes
• Earthquake - Specific fault articles
• Earthquake - Specific earthquake articles

Read more here: » Earthquake: Encyclopedia - Earthquake

Aryabhata (आर्यभट) Āryabhaṭa) is the first of the great astronomers of the classical age of India. He was born in 476 AD in Ashmaka but later lived in Kusumapura, which his commentator Bhāskara I (629 AD) identifies with Pataliputra (modern Patna). His book, the Āryabhatīya, presented astronomical and mathematical theories in which the Earth was taken to be spinning on its axis and the periods of the planets were given with respect to the sun (in other words, it was heliocentric).He believes that the Mo ...

Including:

• Aryabhata - Overview

Read more here: » Aryabhata: Encyclopedia - Aryabhata

The Milky Way (a translation of the Latin Via Lactea, in turn derived from the Greek Γαλαξίας (Galaksias), sometimes referred to simply as "the Galaxy", is a barred spiral galaxy which forms part of the Local Group. Although the Milky Way is but one of billions of galaxies in the universe, the Galaxy has special significance to humanity as it is the home of the solar system. Democritus (460 BC - 370 BC) was the first known person to cla ...

Including:

• Milky Way - Age
• Milky Way - Structure
• Milky Way - The Sun's place in the Milky Way
• Milky Way - The galactic neighborhood
• Milky Way - Speed through space
• Milky Way - Mythology
• Milky Way - Future of Milky Way

Read more here: » Milky Way: Encyclopedia - Milky Way

Centaurus (Latin for centaur) was one of the 48 constellations listed by Ptolemy, and counts also among the 88 modern constellations. This southern constellation is one of the largest in the sky. Centaurus - Notable features. Centaurus is a bright constellation of the southern hemisphere. It contains Proxima Centauri, a red dwarf that is the nearest known star (other than the Sun) to Earth, as well as Alpha Centauri, which is a triple star to which Proxima Centauri is apparently gravitationall ...

Including:

• Centaurus - Notable features
• Centaurus - Notable deep sky objects
• Centaurus - History
• Centaurus - Mythology
• Centaurus - Stars

Read more here: » Centaurus: Encyclopedia - Centaurus

The Stone Age is a broad prehistoric time period during which humans widely used stone for toolmaking. Stone tools were made from a variety of different kinds of stone. For example, flint and chert were shaped (or chipped) for use as cutting tools and weapons, while basalt and sandstone were used for ground stone tools, such as quern-stones. Wood, bone, shell, antler and other materials were widely used, too. During the most recent part of the period, sediments (like clay) were used to make pottery. A series of metal technology innovations characterize the later Cha ...

Including:

• Stone Age - The Stone Age in archaeology
• Stone Age - Modern use of the term
• Stone Age - Human development during the Stone Age
• Stone Age - Palaeolithic
• Stone Age - Epipalaeolithic/Mesolithic
• Stone Age - Neolithic
• Stone Age - Stone Age material culture
• Stone Age - Food and drink
• Stone Age - Shelters and habitats
• Stone Age - Art
• Stone Age - Stone Age rituals and beliefs
• Stone Age - Remnants of Stone Age living in modern times
• Stone Age - The Stone Age in popular culture
• Stone Age - Notes

Read more here: » Stone Age: Encyclopedia - Stone Age

A disaster (from Latin meaning, "bad star") is the impact of a natural or man-made event that negatively affects life, property, livelihood or industry often resulting in permanent changes to human societies, ecosystems and environment. (It may be noted that event itself is not a disaster, it is the impact which is called disaster.) Disasters manifest as hazards exacerbating vulnerable conditions and exceeding individuals' and communities' means to survive and thrive. Most events included herein are compiled from United States Federal Emergency Management Age ...

Including:

• Disaster - Natural disasters
• Disaster - Avalanche
• Disaster - Cold
• Disaster - Disease
• Disaster - Drought
• Disaster - Earthquake
• Disaster - Famine
• Disaster - Fire
• Disaster - Flood
• Disaster - Hail
• Disaster - Heat
• Disaster - Hurricane
• Disaster - Impact event
• Disaster - Limnic eruption
• Disaster - Landslide
• Disaster - Mudslide
• Disaster - Sink hole
• Disaster - Solar flare
• Disaster - Storm surge
• Disaster - Thunderstorm
• Disaster - Tornado
• Disaster - Tsunami
• Disaster - Volcanic eruption
• Disaster - Waterspout
• Disaster - Winter storm
• Disaster - Man-made disasters
• Disaster - Aviation
• Disaster - Arson
• Disaster - CBRNs
• Disaster - Civil disorder
• Disaster - Crime
• Disaster - Data loss
• Disaster - Dam failure
• Disaster - Hazardous materials
• Disaster - Processing interruption
• Disaster - Liquidity shortage
• Disaster - Power outage
• Disaster - Public relations crisis
• Disaster - Radiation Contamination
• Disaster - Space Disasters
• Disaster - Telecommunication outage
• Disaster - Terrorism
• Disaster - War
• Disaster - Surviving a disaster
• Disaster - Personal and family disaster preparation
• Disaster - Local government and emergency services disaster preparation and management
• Disaster - Business disaster preparation and management
• Disaster - National disaster preparation
• Disaster - Humanitarian disaster preparation
• Disaster - Information security disaster preparation

Read more here: » Disaster: Encyclopedia - Disaster

Alternative biochemistry collectively refers to an assortment of astrobiology theories and hypotheses in which life is based on chemical systems other than those used by currently known forms of life. Proponents of such theories sometimes use the expression carbon chauvinism to disparage the assumption that carbon molecules are necessarily the basis for all life. Up to this point, however, no non-carbon based life-form has been discovered. Alternative biochemistry - Silicon biochemistry. The most com ...

Including:

• Alternative biochemistry - Silicon biochemistry
• Alternative biochemistry - Nitrogen/Phosphorus biochemistry
• Alternative biochemistry - Other exotic biochemical elements
• Alternative biochemistry - Non-water solvents
• Alternative biochemistry - Ammonia
• Alternative biochemistry - Other solvents
• Alternative biochemistry - Artificial life
• Alternative biochemistry - In fiction

Read more here: » Alternative biochemistry: Encyclopedia - Alternative biochemistry

1974 (MCMLXXIV) is a common year starting on Tuesday (click on link for calendar). 1974 - Events. January 5 - Dungeons & Dragons officially released. January 6 - In response to the energy crisis, daylight saving time commences nearly four months early in the United States. January 30 - G. Gordon Liddy found guilty of Watergate charges 1974 - February. February 1 - Fire in Joelman Bank Building in Sao Paulo, Brazil - ...

Including:

• 1974 - Events
• 1974 - February
• 1974 - March
• 1974 - April
• 1974 - May
• 1974 - June
• 1974 - July
• 1974 - August
• 1974 - September
• 1974 - October
• 1974 - November
• 1974 - December
• 1974 - Unknown date
• 1974 - Births
• 1974 - January
• 1974 - February
• 1974 - March
• 1974 - April
• 1974 - May
• 1974 - June
• 1974 - July
• 1974 - August
• 1974 - September
• 1974 - October
• 1974 - November
• 1974 - December
• 1974 - Unknown date
• 1974 - Deaths
• 1974 - January
• 1974 - February
• 1974 - March
• 1974 - April
• 1974 - May
• 1974 - June
• 1974 - July
• 1974 - August
• 1974 - September
• 1974 - October
• 1974 - November
• 1974 - December
• 1974 - Nobel Prizes
• 1974 - Fields Medalists
• 1974 - Templeton Prize

Read more here: » 1974: Encyclopedia - 1974

1971 (MCMLXXI) is a common year starting on Friday (click for link to calendar). 1971 - Events. January 1 - British Divorce Reform Act comes into force January 2 - 66 die in stairway crush at Rangers v Celtic football match, Glasgow, Scotland. See Ibrox disaster. January 2 - A ban on television cigarette advertisements goes into effect in the United States. January 3 - BBC Open University begins in the United Kingdom Januar ...

Including:

• 1971 - Events
• 1971 - February
• 1971 - March
• 1971 - April
• 1971 - May
• 1971 - June
• 1971 - July
• 1971 - August
• 1971 - September
• 1971 - October
• 1971 - November
• 1971 - December
• 1971 - unknown dates
• 1971 - Births
• 1971 - January
• 1971 - February
• 1971 - March
• 1971 - April
• 1971 - May
• 1971 - June
• 1971 - July
• 1971 - August
• 1971 - September-
• 1971 - October
• 1971 - November
• 1971 - December
• 1971 - Unknown date
• 1971 - Deaths
• 1971 - January
• 1971 - February
• 1971 - March
• 1971 - April
• 1971 - May
• 1971 - June
• 1971 - July
• 1971 - August
• 1971 - September
• 1971 - October
• 1971 - November
• 1971 - December
• 1971 - Nobel Prizes

Read more here: » 1971: Encyclopedia - 1971

This page refers to the year 1979. For the Smashing Pumpkins song, see 1979 (song). 1979 (MCMLXXIX) is a common year starting on Monday. 1979 - Events. 1979 energy crisis - occurred in the wake of the Iranian Revolution January 1 - United Nations Secretary-General Kurt Waldheim heralds the start of the "International Year of the Child." Many musicians donate to the "Music for UNICEF" fund. January 1 - Sino-American relations: United States and ...

Including:

• 1979 - Events
• 1979 - February
• 1979 - March
• 1979 - April
• 1979 - May
• 1979 - June
• 1979 - July
• 1979 - August
• 1979 - September
• 1979 - October
• 1979 - November
• 1979 - December
• 1979 - Unknown dates
• 1979 - Births
• 1979 - Deaths
• 1979 - January-March
• 1979 - April-September
• 1979 - October-December
• 1979 - Fictional
• 1979 - Nobel Prizes
• 1979 - Templeton Prize

Read more here: » 1979: Encyclopedia - 1979

The Yuuzhan Vong are a race of sentient beings from the fictional Star Wars Expanded Universe that rise as a threat to the New Republic in the New Jedi Order series of novels. The Yuuzhan Vong, and their Chazrach slaves, are the only known alien species in the Star Wars universe to have originated outside the Star Wars galaxy. They are a race of religious zealot masochists. They genetically engineer and grow all of their organic technology and view mechanical technology as blasphemy. The Yuuzhan Vong endeavor to i ...

Including:

• Yuuzhan Vong - Society Description
• Yuuzhan Vong - The Supreme Overlord Caste
• Yuuzhan Vong - The Shaper Caste
• Yuuzhan Vong - The Priest Caste
• Yuuzhan Vong - The Warrior Caste
• Yuuzhan Vong - The Intendant Caste
• Yuuzhan Vong - The Worker Caste
• Yuuzhan Vong - History
• Yuuzhan Vong - Technology
• Yuuzhan Vong - Deities
• Yuuzhan Vong - Yun-Yuuzhan
• Yuuzhan Vong - Yun-Harla
• Yuuzhan Vong - Yun-Yammka
• Yuuzhan Vong - Yun-Ne'Shel
• Yuuzhan Vong - The Lover Gods
• Yuuzhan Vong - Yun-Shuno

Read more here: » Yuuzhan Vong: Encyclopedia - Yuuzhan Vong