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What assumption must be made about the sun's rays if you use Eratosthenes' method for determining the circumference of a large sphere?
Wiki User
∙ 12y ago
The sun's rays are parallel
Wiki User
∙ 12y ago
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What Greek astronomer used observations of the Sun's position at noon on the summer solstice at Alexandria and Syene to determine the circumference of the Earth?
n the 200s BC, Eratosthenes figured out a very clever method for measuring the size of the Earth. He heard about a well in Syene (in modern Egypt) where the sunshine reached the bottom only at noon in the summer solstice. So he knew exactly when the sun was directly overhead. Further north in Alexandria he put a stick straight up in the ground and measured the angle of its shadow at that precise moment as 7.2°. It meant that the distance from Syene to Alexandria was 7.2/360 of the Earth's circumference. Since he knew this distance, he could compute the circumference as 39250km, a diameter of about 12500km.n the 200s BC, Eratosthenes figured out a very clever method for measuring the size of the Earth. He heard about a well in Syene (in modern Egypt) where the sunshine reached the bottom only at noon in the summer solstice. So he knew exactly when the sun was directly overhead. Further north in Alexandria he put a stick straight up in the ground and measured the angle of its shadow at that precise moment as 7.2°. It meant that the distance from Syene to Alexandria was 7.2/360 of the Earth's circumference. Since he knew this distance, he could compute the circumference as 39250km, a diameter of about 12500km.
What is the quasar method?
It is a method of reading, which helps improve your reading speed.
How do astronomers measure distances to stars including the parallax method?
They use the banana method
What is the method of recording the location of stars?
A method of recording the location of stars is by taking pictures of them/photography.
What single method do astronomers use to solve there problems?
Astonomers, like all scientists, dont have one single method ,or "The Scientific Method". They have a wide variey of ways to solve problems.
What assumption must be made about the suns rays if you use eratosthenes method for determining the circumference of a large sphere?
you must think that the sun's rays are parallel and never touching, therefore all create the same angle.
Did the roman culture compute the circumference of earth?
No, that calculation was performed by Eratosthenes the Greek, as he worked in the Pharaoh's library at Alexandria, Egypt, using figures supplied by the Pharaoh's geometers. This would have been just a few centuries after the founding of the City of Rome, before it had grown into an empire. Eratosthenes worked out the method for determining earth's circumference after reading ancient Egyptian texts concerning the shadow cast in a well in Cyene, an Egyptian city on the Tropic of Cancer, at noon on the summer solstice.
What date was Sieve Eratosthenes born?
About 276 BC Eratosthenes was a Greek mathematician who is credited with a simple method of making a list of as many primes as you wish. His method is known as the Sieve of Eratosthenes.
What is the name of Eratosthenes' method of finding composite numbers?
Eratosthenes' method of finding prime and composite number is called 'The Sieve of Eratosthene'.
What is Eratosthenes?
He was an ancient Greek mathematician of the 2nd/3rd century BC, as well as a poet, geographer, musical composer, scholar, and astronomer. He was the first Greek to estimate the circumference and tilt of the earth. He created a map of the earth based on the knowledge available at the time. He was highly respected, and his calculations of the earth's circumference were used for hundreds of years. Today, his method for finding prime numbers from 1-100 is known as the 'Sieve of Eratosthenes' and is taught in math textbooks.
What is the name of Eratosthenes method of finding prime numbers?
It is called a sieve.
Eratosthenes determined the circumference of Earth by conducting an experiment. Put his steps in order as they correlate to the scientific method?
Conduct an Experiment, Make observations, Draw Conclusions
Who device the method that will separate prime from a set of whole numbers?
Eratosthenes created a sieve that will do that.
How did Eratosthenes know the Earth was round?
Eratosthenes' method requires that one know or determine the vertical angle of the sun above the horizon or from the zenith (a point directly overhead) at solar noon at two locations along the same line of longitude. The distance between the two locations must also be known.
Which of the following is not an assumption that is to the scientific method?
Empiricality
What is a key of assumption of scientific method?
Predictability
Method of proof starting with false assumption?
Induction
