Dos extraterrestres llegan a Barcelona para estudiar a los humanos. Uno de ellos, Gurb, se separa del otro y este no tiene noticias de él durante gran parte de la novela. Mientras tanto, Gurb interactúa con varios residentes de Barcelona y experimenta la vida en la Tierra. Al final, Gurb reaparece justo antes de que el otro extraterrestre regrese a su planeta, deciden quedarse en la Tierra.
Cosmic rays are high-energy particles originating from outer space that bombard Earth's atmosphere. They are composed of protons, electrons, neutrinos, and atomic nuclei. Primary cosmic rays come from astrophysical sources like supernovae, neutron stars, and black holes. Secondary cosmic rays are produced when primary cosmic rays interact with the Earth's atmosphere. The history of cosmic rays includes their discovery in the late 19th century by Henri Becquerel and Victor Hess, and later work in the early 20th century that established they originate outside the Earth's atmosphere and consist of charged particles. Modern research on cosmic rays includes using extensive air shower arrays and tracking detectors to study their origins and composition.
The document summarizes key concepts from a chapter on refraction and lenses, including how light changes speed and direction when passing through different materials. It explains refraction through Snell's law, total internal reflection, lenses, dispersion, and applications like mirages and rainbows. Concepts are defined and examples are provided to illustrate refractive principles and their practical uses.
Uranus has 27 known moons that can be divided into three groups: 13 inner moons that are closely connected to Uranus's rings, 5 major moons that are spherical in shape, and 9 irregular moons in distant elliptical orbits. The 5 major moons - Miranda, Ariel, Umbriel, Titania, and Oberon - range in size from 472 km to 1578 km in diameter and are believed to have formed from an accretion disk around Uranus after its formation. Titania is the largest moon.
A presentation on the planet Venus. Designed for 5th grade students. Contains basic facts, including the space probes that helped us learn about Venus. Includes quiz questions at the end.
Speed of light [3 of 4] measured by RomerStephen Kwong
Ole Römer observed discrepancies in the timing of eclipses of Jupiter's moon Io that varied depending on Earth's position in its orbit around the Sun. He realized this was because light takes a finite amount of time to travel between Earth and Jupiter. By calculating how the discrepancies changed over Earth's orbit, Römer was able to determine light travels at about 186,000 miles per second. This was the first direct measurement of the finite speed of light and helped overturn the prevailing view that light traveled instantaneously.
Dos extraterrestres llegan a Barcelona para estudiar a los humanos. Uno de ellos, Gurb, se separa del otro y este no tiene noticias de él durante gran parte de la novela. Mientras tanto, Gurb interactúa con varios residentes de Barcelona y experimenta la vida en la Tierra. Al final, Gurb reaparece justo antes de que el otro extraterrestre regrese a su planeta, deciden quedarse en la Tierra.
Cosmic rays are high-energy particles originating from outer space that bombard Earth's atmosphere. They are composed of protons, electrons, neutrinos, and atomic nuclei. Primary cosmic rays come from astrophysical sources like supernovae, neutron stars, and black holes. Secondary cosmic rays are produced when primary cosmic rays interact with the Earth's atmosphere. The history of cosmic rays includes their discovery in the late 19th century by Henri Becquerel and Victor Hess, and later work in the early 20th century that established they originate outside the Earth's atmosphere and consist of charged particles. Modern research on cosmic rays includes using extensive air shower arrays and tracking detectors to study their origins and composition.
The document summarizes key concepts from a chapter on refraction and lenses, including how light changes speed and direction when passing through different materials. It explains refraction through Snell's law, total internal reflection, lenses, dispersion, and applications like mirages and rainbows. Concepts are defined and examples are provided to illustrate refractive principles and their practical uses.
Uranus has 27 known moons that can be divided into three groups: 13 inner moons that are closely connected to Uranus's rings, 5 major moons that are spherical in shape, and 9 irregular moons in distant elliptical orbits. The 5 major moons - Miranda, Ariel, Umbriel, Titania, and Oberon - range in size from 472 km to 1578 km in diameter and are believed to have formed from an accretion disk around Uranus after its formation. Titania is the largest moon.
A presentation on the planet Venus. Designed for 5th grade students. Contains basic facts, including the space probes that helped us learn about Venus. Includes quiz questions at the end.
Speed of light [3 of 4] measured by RomerStephen Kwong
Ole Römer observed discrepancies in the timing of eclipses of Jupiter's moon Io that varied depending on Earth's position in its orbit around the Sun. He realized this was because light takes a finite amount of time to travel between Earth and Jupiter. By calculating how the discrepancies changed over Earth's orbit, Römer was able to determine light travels at about 186,000 miles per second. This was the first direct measurement of the finite speed of light and helped overturn the prevailing view that light traveled instantaneously.
Various optical instruments have been designed, using the property of reflection and refraction. Copy the link given below and paste it in new browser window to get more information on Introduction Of Ray Optics and Optical Instruments www.askiitians.com/iit-jee-ray-optics/introduction-of-ray-optics-and-optical-instruments/
This is a presentation on prominent space agencies across the world. It includes NASA (USA), ROSCOSMOS (Russia), ESA (European Union), JAXA (Japan), CNSA (China) and ISRO (India) with emphasis on ISRO. The information provided in the slides is as per available in public domain (2017 and before). All the space agencies and their are scientists are toiling hard for Science and Technology and betterment of humankind. No one is superior or inferior. We must praise and congratulate these space agencies and several other agencies (directly and indirectly pertaining to space who are developed or in development process) whenever possible.
This document discusses and rebuts various conspiracy theories about the moon landing being faked. It addresses claims such as flags waving in the lack of wind, the lack of stars or craters in photos, mysterious lights and reflections, and shadows of differing lengths. The document provides scientific explanations for these observations, such as multiple light sources on the moon, camera exposure settings, and the properties of moon dust. It argues that faking the moon landing would have been extremely difficult and costly, and that observable details are consistent with the conditions on the lunar surface.
Keplar's laws of planetary motion Class 11 physicsDevangSPSingh
Johannes Kepler was a German mathematician and astronomer best known for his laws of planetary motion. Kepler's three laws describe the motion of planets around the sun: 1) planets move in elliptical orbits with the sun at one focus, 2) a line connecting a planet to the sun sweeps out equal areas in equal times, and 3) the square of a planet's orbital period is proportional to the cube of its semi-major axis. Kepler's laws formed a basis for Isaac Newton's theory of universal gravitation and are still important for studying planetary orbits and satellite motion.
Bintang ganda adalah sistem dua atau lebih bintang yang terikat oleh gaya gravitasi. Bintang-bintang dalam sistem bintang ganda mengorbit pusat massa mereka dalam elips, dengan bintang bermassa besar berada di titik fokus. Pengamatan komponen orbit seperti periode, sudut setengah sumbu besar, dan eksentrisitas memungkinkan penentuan massa dan jarak masing-masing bintang.
in this presentation analyzing optical telescope and type of lens then lens telescope compared newton telescope in university of sulaimani. tell me for other description.
This document provides a table of contents for a document on optics. It outlines topics like Maxwell's equations, electromagnetic wave equations, geometrical optics, diffraction, and more. Key figures in the development of these topics are also mentioned, such as Maxwell, Helmholtz, Kirchhoff, and Fresnel. The document derives equations like the scalar Helmholtz differential equation and provides an overview of Fresnel-Kirchhoff diffraction theory.
Dokumen tersebut merupakan solusi dan pembahasan soal olimpiade astronomi nasional tahun 2011. Dokumen tersebut berisi penjelasan singkat mengenai jawaban soal-soal olimpiade tersebut beserta ilustrasi dan prinsip-prinsip dasar yang relevan.
Teks tersebut memberikan penjelasan mendetail tentang beberapa konsep astrofisika seperti teori relativitas Einstein, karakteristik bintang Polaris, fase planet, dan evolusi Matahari. Secara khusus, teks tersebut menjelaskan bukti-bukti empiris yang mendukung teori relativitas Einstein, cara menentukan jarak planet dari Bumi menggunakan hukum Titius-Bode, dan perkiraan umur Matahari saat ini berdasarkan teori evolusi bintang.
Dokumen tersebut membahas tentang konsep waktu dan kalender dalam astronomi, termasuk satuan-satuan waktu seperti hari, jam, detik, dan tahun yang digunakan untuk mengukur peristiwa-peristiwa kosmik seperti rotasi dan revolusi Bumi."
Various optical instruments have been designed, using the property of reflection and refraction. Copy the link given below and paste it in new browser window to get more information on Introduction Of Ray Optics and Optical Instruments www.askiitians.com/iit-jee-ray-optics/introduction-of-ray-optics-and-optical-instruments/
This is a presentation on prominent space agencies across the world. It includes NASA (USA), ROSCOSMOS (Russia), ESA (European Union), JAXA (Japan), CNSA (China) and ISRO (India) with emphasis on ISRO. The information provided in the slides is as per available in public domain (2017 and before). All the space agencies and their are scientists are toiling hard for Science and Technology and betterment of humankind. No one is superior or inferior. We must praise and congratulate these space agencies and several other agencies (directly and indirectly pertaining to space who are developed or in development process) whenever possible.
This document discusses and rebuts various conspiracy theories about the moon landing being faked. It addresses claims such as flags waving in the lack of wind, the lack of stars or craters in photos, mysterious lights and reflections, and shadows of differing lengths. The document provides scientific explanations for these observations, such as multiple light sources on the moon, camera exposure settings, and the properties of moon dust. It argues that faking the moon landing would have been extremely difficult and costly, and that observable details are consistent with the conditions on the lunar surface.
Keplar's laws of planetary motion Class 11 physicsDevangSPSingh
Johannes Kepler was a German mathematician and astronomer best known for his laws of planetary motion. Kepler's three laws describe the motion of planets around the sun: 1) planets move in elliptical orbits with the sun at one focus, 2) a line connecting a planet to the sun sweeps out equal areas in equal times, and 3) the square of a planet's orbital period is proportional to the cube of its semi-major axis. Kepler's laws formed a basis for Isaac Newton's theory of universal gravitation and are still important for studying planetary orbits and satellite motion.
Bintang ganda adalah sistem dua atau lebih bintang yang terikat oleh gaya gravitasi. Bintang-bintang dalam sistem bintang ganda mengorbit pusat massa mereka dalam elips, dengan bintang bermassa besar berada di titik fokus. Pengamatan komponen orbit seperti periode, sudut setengah sumbu besar, dan eksentrisitas memungkinkan penentuan massa dan jarak masing-masing bintang.
in this presentation analyzing optical telescope and type of lens then lens telescope compared newton telescope in university of sulaimani. tell me for other description.
This document provides a table of contents for a document on optics. It outlines topics like Maxwell's equations, electromagnetic wave equations, geometrical optics, diffraction, and more. Key figures in the development of these topics are also mentioned, such as Maxwell, Helmholtz, Kirchhoff, and Fresnel. The document derives equations like the scalar Helmholtz differential equation and provides an overview of Fresnel-Kirchhoff diffraction theory.
Dokumen tersebut merupakan solusi dan pembahasan soal olimpiade astronomi nasional tahun 2011. Dokumen tersebut berisi penjelasan singkat mengenai jawaban soal-soal olimpiade tersebut beserta ilustrasi dan prinsip-prinsip dasar yang relevan.
Teks tersebut memberikan penjelasan mendetail tentang beberapa konsep astrofisika seperti teori relativitas Einstein, karakteristik bintang Polaris, fase planet, dan evolusi Matahari. Secara khusus, teks tersebut menjelaskan bukti-bukti empiris yang mendukung teori relativitas Einstein, cara menentukan jarak planet dari Bumi menggunakan hukum Titius-Bode, dan perkiraan umur Matahari saat ini berdasarkan teori evolusi bintang.
Dokumen tersebut membahas tentang konsep waktu dan kalender dalam astronomi, termasuk satuan-satuan waktu seperti hari, jam, detik, dan tahun yang digunakan untuk mengukur peristiwa-peristiwa kosmik seperti rotasi dan revolusi Bumi."
2. Felfedezésének története A galvánelem kifejezés Luigi Galvani (1737-1798) olasz anatómia professzor nevéből származik. Történt ugyanis Bolognában 1790-ben, hogy Galvani felesége náthás lett és az orvosa békacombból készült erősítő húslevest írt elő számára.
3. A békák nyúzása során azt tapasztalták, hogy a combok összerándultak, amint a szikével hozzáértek és a közelben egy dörzselektromos gépet működtettek. Galvani további kísérleteket is végzett, ám a jelenséget tévesen egyfajta állati elektromosságnak tartotta.
5. 1791-ben Galvani közzé tette megfigyeléseit, így a kor számos tudósa figyelt fel az érdekes jelenségre. A paviai egyetem professzora Alessandro Volta (1745-1827) is elvégezte a kísérleteket, majd egy 1792-ben írt levelében rámutatott arra, hogy a jelenség csak akkor megy végbe, ha két különböző fém érintkezik a békacombbal.
6. Az első galvánelem Az olasz Alessandro Volta 1799-ben újfajta áramforrást talált fel: a galvánelemet. A legelső galvánelem egy cink és egy ezüstkorongból, valamint a közéjük helyezett, sós vízzel átitatott papírlapból állt.
7. Felépítése Az elektronok felszabadulnak. A cukor oldódik vízben. Hasonlóképpen igen kis mértékben a fémek is oldódnak a savas vízben úgy, hogy egy-egy fématom válik le a fémről, és a folyadékba lép.
8. Miközben a fématom oldatba megy, nem viszi magával összes elektronjait, hanem egy-két elektront hátrahagy a fémdarabon. Ennek az lesz a következménye, hogy a folyadékba merülő fémen megszaporodnak a szabad elektronok, a fém negatív töltésű lesz. Cinkből több atom megy oldatba, mint a rézből. Ezért a kénsavas vízbe merülő cinken sokkal több elektron gyűlik össze, mint a rézen.
9. A cinknek nagyobb lesz az elektromos feszültsége, mint a réznek. A cinklemezen összegyülemlett nagyobb számú elektron a réz felé áramlik, ha a réz- és a cinklemezt a folyadékon kívül vezetővel összekötjük. Ha a réz- és a cinklemez közé zseblámpát iktatunk, az elektronáram izzásba hozza a lámpa szálát.
10. Aszerint, hogy kocsonyásított vagy folyékony anyagot tartalmaznak szárazelemnek, (pl.Leclanché-elem) vagy nedveselemnek (pl. Daniell-elem) nevezzük őket. Daniell elem mellett számos más elemet is fejlesztettek ki, pl. a Bunsen, krómsav, Lalande, Leclanché elemeket.
11. A folyadékba merülő fémek negatív töltésűek. A cink negatív feszültsége nagyobb, mint a rézé.
12. A rézre áramlott elektronokat az odaúszó pozitív cinkionok felveszik.