The biggest earthquake ever recorded has a magnitude of ________
Anonymous Poll
27%
9.6
23%
9.3
38%
9.8
13%
9.5
The sunlight takes ____ hours to reach pluto.
Anonymous Poll
30%
4.9 hours
31%
5.7 hours
25%
5.5 hours
14%
5.3 hours
EthioPhysics.pdf
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โ
EXAM FOR APPLICANTS
Total weight 100%
Minimum Requirement 40%
๐Submission Date 20 April 2021
โ Submit your answer via ๐ @ethio_physics_bot
Join us ๐ @ethio_physics
Total weight 100%
Minimum Requirement 40%
๐Submission Date 20 April 2021
โ Submit your answer via ๐ @ethio_physics_bot
Join us ๐ @ethio_physics
Did you know??
The world as we know it has three dimensions of spaceโlength, width and depthโand one dimension of time. But there's the mind-bending possibility that many more dimensions exist out there. According to string theory, one of the leading physics model of the last half century, the universe operates with 10 dimensions.
Join us @ethio_physics
@ethio_physics
The world as we know it has three dimensions of spaceโlength, width and depthโand one dimension of time. But there's the mind-bending possibility that many more dimensions exist out there. According to string theory, one of the leading physics model of the last half century, the universe operates with 10 dimensions.
Join us @ethio_physics
@ethio_physics
Ancient Mayan astronomical Observations
1. Solar
The Maya were aware of the solstices and equinoxes. This is demonstrated in building alignments. More important to them were zenithal passage days. In the Tropics the Sun passes directly overhead twice each year. Many known structures in Mayan temples were built to observe this. Munro S. Edmonson studied 60 mesoamerican calendars and found remarkable consistency in the calendars, except รบfor a number of different year bearer systems. He thought that these different year bearers were based on the solar years in which they were initiated.
The Maya were aware of the fact that the 365-day Haab' differs from the Tropical year by about .25 days per year. A number of different intervals are given on Maya monuments that can be used to approximate the tropical year.The most accurate of these is that the tropical year exceeds the length of the 365 day Haab' by one day every 1,508 days. The occurrence of a particular solstice on a given date in the Haab' will repeat after the passage of 1,508 365-day Haab' years. The Haab' will lose one day every 1,508 days and it will take 1,508 Haab' years to lose one Haab' year. So 365 x 1,508 = 365.2422 x 1,507 or 1,508 Haab' years = 1,507 Tropical years of 365.2422 days.
Join us @ethio_physics
1. Solar
The Maya were aware of the solstices and equinoxes. This is demonstrated in building alignments. More important to them were zenithal passage days. In the Tropics the Sun passes directly overhead twice each year. Many known structures in Mayan temples were built to observe this. Munro S. Edmonson studied 60 mesoamerican calendars and found remarkable consistency in the calendars, except รบfor a number of different year bearer systems. He thought that these different year bearers were based on the solar years in which they were initiated.
The Maya were aware of the fact that the 365-day Haab' differs from the Tropical year by about .25 days per year. A number of different intervals are given on Maya monuments that can be used to approximate the tropical year.The most accurate of these is that the tropical year exceeds the length of the 365 day Haab' by one day every 1,508 days. The occurrence of a particular solstice on a given date in the Haab' will repeat after the passage of 1,508 365-day Haab' years. The Haab' will lose one day every 1,508 days and it will take 1,508 Haab' years to lose one Haab' year. So 365 x 1,508 = 365.2422 x 1,507 or 1,508 Haab' years = 1,507 Tropical years of 365.2422 days.
Join us @ethio_physics
Ancient Mayan astronomical observations
2. Lunar
Many inscriptions include data on the number of days elapsed in the current lunation, the number of days in the current lunation and the position of the lunation in a cycle of six lunations.
Modern astronomers consider conjunction of Sun and Moon (when the Sun and Moon have the same ecliptic longitude) to be the New Moon. The Maya counted the zero day of the lunar cycle as either the first day when one could no longer see the waning crescent Moon or the first day when one could see the thin crescent waxing Moon (the Palenque system). Using this system, the zero date of the lunar count is about two days after astronomical new Moon. Aveni and Fuls analysed a large number of these inscription and found strong evidence for the Palenque system. However Fuls found "โฆat least two different methods and formulas were used to calculate the moon's age and position in the six-month cycleโฆ"
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2. Lunar
Many inscriptions include data on the number of days elapsed in the current lunation, the number of days in the current lunation and the position of the lunation in a cycle of six lunations.
Modern astronomers consider conjunction of Sun and Moon (when the Sun and Moon have the same ecliptic longitude) to be the New Moon. The Maya counted the zero day of the lunar cycle as either the first day when one could no longer see the waning crescent Moon or the first day when one could see the thin crescent waxing Moon (the Palenque system). Using this system, the zero date of the lunar count is about two days after astronomical new Moon. Aveni and Fuls analysed a large number of these inscription and found strong evidence for the Palenque system. However Fuls found "โฆat least two different methods and formulas were used to calculate the moon's age and position in the six-month cycleโฆ"
Join us @ethio_physics
Ancient Mayan astronomical observations
3. Venus
Venus was extremely important to the people of Mesoamerica. Its cycles were carefully tracked by the Maya.
Because Venus is closer to the Sun than the Earth, it passes the Earth during its orbit. When it passes behind the Sun at superior conjunction and between the Earth and the Sun at inferior conjunction it is invisible. Particularly dramatic is the disappearance as evening star and its reappearance as the morning star approximately eight days later, after inferior conjunction. The cycle of Venus is 583.92 days long but it varies between 576.6 and 588.1 days. Astronomers calculate heliacal phenomena (first and last visibility of rising or setting bodies) using the arcus visionis โ the difference in altitude between the body and the center of the Sun at the time of geometric rising or setting of the body, not including the 34 arc minutes of refraction that allows one to see a body before its geometric rise or the 0.266,563,88... degree semidiameter of the sun. Atmospheric phenomena like extinction are not considered. The required arcus visionis varies with the brightness of the body. Because Venus varies in size and has phases, a different arcus visionus is used for the four different rising and settings.
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3. Venus
Venus was extremely important to the people of Mesoamerica. Its cycles were carefully tracked by the Maya.
Because Venus is closer to the Sun than the Earth, it passes the Earth during its orbit. When it passes behind the Sun at superior conjunction and between the Earth and the Sun at inferior conjunction it is invisible. Particularly dramatic is the disappearance as evening star and its reappearance as the morning star approximately eight days later, after inferior conjunction. The cycle of Venus is 583.92 days long but it varies between 576.6 and 588.1 days. Astronomers calculate heliacal phenomena (first and last visibility of rising or setting bodies) using the arcus visionis โ the difference in altitude between the body and the center of the Sun at the time of geometric rising or setting of the body, not including the 34 arc minutes of refraction that allows one to see a body before its geometric rise or the 0.266,563,88... degree semidiameter of the sun. Atmospheric phenomena like extinction are not considered. The required arcus visionis varies with the brightness of the body. Because Venus varies in size and has phases, a different arcus visionus is used for the four different rising and settings.
Join us @ethio_physics
Ancient Mayan astronomical observations
4. Stars
The Maya identified 13 constellations along the ecliptic. These are the content of an almanac in the Paris Codex. Each of these was associated with an animal. These animal representations are pictured in two almanacs in the Madrid Codex where they are related to other astronomical phenomena โ eclipses and Venus โ and Haab rituals.
Paris codex
Pages 21โ24 of the Paris Codex are a zodiacal almanac. It is made up of five rows of 364 days each. Each row is divided into 13 subdivisions of 28 days each. Its iconography consists of animals, including a scorpion suspended from a skyband and eclipse glyphs. It dates from the eighth century.
Madrid codex
The longest almanac in the Madrid codex (pages 65โ72,73b) is a compendium of information about agriculture, ceremonies, rituals and other matters. Astronomical information includes references to eclipses, the synodic cycles of Venus and zodiacal constellations. The almanac dates to the middle of the fifteenth century.
Join us @ethio_physics
4. Stars
The Maya identified 13 constellations along the ecliptic. These are the content of an almanac in the Paris Codex. Each of these was associated with an animal. These animal representations are pictured in two almanacs in the Madrid Codex where they are related to other astronomical phenomena โ eclipses and Venus โ and Haab rituals.
Paris codex
Pages 21โ24 of the Paris Codex are a zodiacal almanac. It is made up of five rows of 364 days each. Each row is divided into 13 subdivisions of 28 days each. Its iconography consists of animals, including a scorpion suspended from a skyband and eclipse glyphs. It dates from the eighth century.
Madrid codex
The longest almanac in the Madrid codex (pages 65โ72,73b) is a compendium of information about agriculture, ceremonies, rituals and other matters. Astronomical information includes references to eclipses, the synodic cycles of Venus and zodiacal constellations. The almanac dates to the middle of the fifteenth century.
Join us @ethio_physics
Short history about Ancient Mayans
Mayan civilization lasted for more than 2,000 years, but the period from about 300 A.D. to 900 A.D., known as the Classic Period, was its heyday. During that time, the Maya developed a complex understanding of astronomy. They also figured out how to grow corn, beans, squash and cassava in sometimes-inhospitable places; how to build elaborate cities without modern machinery; how to communicate with one another using one of the worldโs first written languages; and how to measure time using not one but two complicated calendar systems.
The Maya strongly believed in the influence of the cosmos on daily life. Consequently, Mayan knowledge and understanding of celestial bodies was advanced for their time: For example, they knew how to predict solar eclipses. They also used astrological cycles to aid in planting and harvesting and developed two calendars that are as precise as those we use today.
Join us @ethio_physics
Mayan civilization lasted for more than 2,000 years, but the period from about 300 A.D. to 900 A.D., known as the Classic Period, was its heyday. During that time, the Maya developed a complex understanding of astronomy. They also figured out how to grow corn, beans, squash and cassava in sometimes-inhospitable places; how to build elaborate cities without modern machinery; how to communicate with one another using one of the worldโs first written languages; and how to measure time using not one but two complicated calendar systems.
The Maya strongly believed in the influence of the cosmos on daily life. Consequently, Mayan knowledge and understanding of celestial bodies was advanced for their time: For example, they knew how to predict solar eclipses. They also used astrological cycles to aid in planting and harvesting and developed two calendars that are as precise as those we use today.
Join us @ethio_physics
๐ฅ Did You Know?
The Oort Cloud is the most distant region of our solar system. Even though Voyager 1 travels about a million miles per day, the spacecraft will take about 300 years to reach the inner boundary of the Oort Cloud and probably another 30,000 years to exit the far side.
Know More
Join us ๐ @ethio_physics
The Oort Cloud is the most distant region of our solar system. Even though Voyager 1 travels about a million miles per day, the spacecraft will take about 300 years to reach the inner boundary of the Oort Cloud and probably another 30,000 years to exit the far side.
Know More
Join us ๐ @ethio_physics
๐ฅ Fact
This is the world's first picture of the surface of a comet, taken by the Rosetta space probe shortly before crash-landing into Comet 67P.
Know More: NASA
Join us ๐ @ethio_physics
This is the world's first picture of the surface of a comet, taken by the Rosetta space probe shortly before crash-landing into Comet 67P.
Know More: NASA
Join us ๐ @ethio_physics
๐ฅMind-blowing Fact
The atmospheric pressure of Venus is 92 times stronger than Earthโs. This means that any small asteroids entering the atmosphere of Venus are crushed by the immense pressure,
.
.
which is why there are no small surface craters on the planet. This pressure is equivalent to being around 1,000 km under Earthโs oceans.๐
Join us ๐ @ethio_physics
The atmospheric pressure of Venus is 92 times stronger than Earthโs. This means that any small asteroids entering the atmosphere of Venus are crushed by the immense pressure,
.
.
which is why there are no small surface craters on the planet. This pressure is equivalent to being around 1,000 km under Earthโs oceans.๐
Join us ๐ @ethio_physics
โค1
แแณ แแญแต แแญ แแแแแชแซ แแ แแแฎแแฐแญ แ แฐแณแซ แแแณ แ แ แจแจ
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แจแ แแชแซ แจแ แ แแญแแญ แฐแแ แแณ แ แแฒแต แ แแต แซแแฝ แแแฎแแฐแญแ แ แแญแต แแแแต แแญ แ แฐแณแซ แแแณ แแฅแจแญ แปแแข
แแณ 'แขแแแแฉแฒ' แ แแฃแ แจแแตแ แซแแ แฐแ แ แแฃ แแแฎแแฐแญ แ แแแแท แแญ แแฅแจแญ แจแปแแ แจแ แแต แฐแแ แ แณแฝ แแแ แแ แขแแแแค แ แแ แจแแแ แญแแ แแญ แจแแแ แตแแซ แแฅแฅแญ แจแแฐแจแแแตแ แจแแแแชแซแแ แ แจแซ แแตแจแ แ แแปแ แณแแ แฐแตแณ แฐแแฅแฏแแข
แแแฎแแฐแฏ แ แแญแต แแญ แ แจแซ แแตแจแแ แ แฐแแแจแฐ แ แแแแท แแญ แจแแแ แณแฐแแญแต แแฐ แแฌแต แจแฐแแแ แแจแ แแแจแแแฅ แฐแฝแแแข
แจแ แ แแญแแญ แฐแแ แจแแ แแจแซแ แ แแ แฐแแณแณแญ แซแแฐแแจแฉ แ แจแซแแฝแ แแฐแแต แฅแแฐแแซแจแแแ แแ แแฅแทแแข
แ แจแซแแ แซแฐแจแแฝแ แแแฎแแฐแญ แแฐ แแญแต แจแฐแแฐแฐแฝแ 'แแญแฒแจแซแแต' แ แฐแฃแแฝแ แจแแณ แแแฎแซแฉแญ แฒแแแค แแแฎแซแฉแฏ แฃแแแ แจแซแฒแต แแญ แ แแญแ แแแแต แแญ แแจแ แญแณแแณแแข
Join ๐ @ethio_physics
*********************************
แจแ แแชแซ แจแ แ แแญแแญ แฐแแ แแณ แ แแฒแต แ แแต แซแแฝ แแแฎแแฐแญแ แ แแญแต แแแแต แแญ แ แฐแณแซ แแแณ แแฅแจแญ แปแแข
แแณ 'แขแแแแฉแฒ' แ แแฃแ แจแแตแ แซแแ แฐแ แ แแฃ แแแฎแแฐแญ แ แแแแท แแญ แแฅแจแญ แจแปแแ แจแ แแต แฐแแ แ แณแฝ แแแ แแ แขแแแแค แ แแ แจแแแ แญแแ แแญ แจแแแ แตแแซ แแฅแฅแญ แจแแฐแจแแแตแ แจแแแแชแซแแ แ แจแซ แแตแจแ แ แแปแ แณแแ แฐแตแณ แฐแแฅแฏแแข
แแแฎแแฐแฏ แ แแญแต แแญ แ แจแซ แแตแจแแ แ แฐแแแจแฐ แ แแแแท แแญ แจแแแ แณแฐแแญแต แแฐ แแฌแต แจแฐแแแ แแจแ แแแจแแแฅ แฐแฝแแแข
แจแ แ แแญแแญ แฐแแ แจแแ แแจแซแ แ แแ แฐแแณแณแญ แซแแฐแแจแฉ แ แจแซแแฝแ แแฐแแต แฅแแฐแแซแจแแแ แแ แแฅแทแแข
แ แจแซแแ แซแฐแจแแฝแ แแแฎแแฐแญ แแฐ แแญแต แจแฐแแฐแฐแฝแ 'แแญแฒแจแซแแต' แ แฐแฃแแฝแ แจแแณ แแแฎแซแฉแญ แฒแแแค แแแฎแซแฉแฏ แฃแแแ แจแซแฒแต แแญ แ แแญแ แแแแต แแญ แแจแ แญแณแแณแแข
Join ๐ @ethio_physics
๐ฅ Mind Blowing Fact
The asteroid impact that killed the dinosaurs was powerful enough to send Earth rocks to Mars and even Europa (a moon of Jupiter). As a result, if we ever find life on those worlds it may actually have originated on our own planet.
Know More
Join ๐ @ethio_physics
The asteroid impact that killed the dinosaurs was powerful enough to send Earth rocks to Mars and even Europa (a moon of Jupiter). As a result, if we ever find life on those worlds it may actually have originated on our own planet.
Know More
Join ๐ @ethio_physics