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How Johannes Kepler found the value of gravitational acceleration?
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How can scientists measure the distance between Earth and Mars?
The distances in the solar system can all be related by Kepler's laws, which give the relative distances. A single measurement of one particular distance then enables the scale to be decided so that all the distances are then known The best single measurement is made during a transit of Venus observed from two different widely separated places on the Earth. The two observations from the ends of a known baseline enable the distance to be found by triangulation.
How does earth's rotation determine whether it is day or night?
== == Circular and Satellite Motion: Chapter Outline About the Tutorial Tutorial Topics Usage Policy Feedback Speed and Velocity Acceleration The Centripetal Force Requirement The Forbidden F-Word Mathematics of Circular Motion == Newton's Second law - Revisited Amusement Park Physics Athletics==== ==== Gravity is More Than a Name The Apple, the Moon, and the Inverse Square Law Newton's Law of Universal Gravitation Cavendish and the Value of G The Value of g==== ==== Kepler's Three Laws Circular Motion Principles for Satellites Mathematics of Satellite Motion Weightlessness in Orbit Energy Relationships for SatellitesIn the early 1600s, Johannes Kepler proposed three laws of planetary motion. Kepler was able to summarize the carefully collected data of his mentor - Tycho Brahe - with three statements which described the motion of planets in a sun-centered solar system. Kepler's efforts to explain the underlying reasons for such motions are no longer accepted; nonetheless, the actual laws themselves are still considered an accurate description of the motion of any planet and any satellite. Kepler's three laws of planetary motion can be described as follows: * The path of the planets about the sun are elliptical in shape, with the center of the sun being located at one focus. (The Law of Ellipses) * An imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time. (The Law of Equal Areas) * The ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun. (The Law of Harmonies) Kepler's first law - sometimes referred to as the law of ellipses - explains that planets are orbiting the sun in a path described as an ellipse. An ellipse can easily be constructed using a pencil, two tacks, a string, a sheet of paper and a piece of cardboard. Tack the sheet of paper to the cardboard using the two tacks. Then tie the string into a loop and wrap the loop around the two tacks. Take your pencil and pull the string until the pencil and two tacks make a triangle (see diagram at the right). Then begin to trace out a path with the pencil, keeping the string wrapped tightly around the tacks. The resulting shape will be an ellipse. An ellipse is a special curve in which the sum of the distances from every point on the curve to two other points is a constant. The two other points (represented here by the tack locations) are known as the foci of the ellipse. The closer together which these points are, the more closely that the ellipse resembles the shape of a circle. In fact, a circle is the special case of an ellipse in which the two foci are at the same location. Kepler's first law is rather simple - all planets orbit the sun in a path which resembles an ellipse, with the sun being located at one of the foci of that ellipse. Kepler's second law - sometimes referred to as the law of equal areas - describes the speed at which any given planet will move while orbiting the sun. The speed at which any planet moves through space is constantly changing. A planet moves fastest when it is closest to the sun and slowest when it is furthest from the sun. Yet, if an imaginary line were drawn from the center of the planet to the center of the sun, that line would sweep out the same area in equal periods of time. For instance, if an imaginary line were drawn from the earth to the sun, then the area swept out by the line in every 31-day month would be the same. This is depicted in the diagram below. As can be observed in the diagram, the areas formed when the earth is closest to the sun can be approximated as a wide but short triangle; whereas the areas formed when the earth is farthest from the sun can be approximated as a narrow but long triangle. These areas are the same size. Since the base of these triangles are longer when the earth is furthest from the sun, the earth would have to be moving more slowly in order for this imaginary area to be the same size as when the earth is closest to the sun. Kepler's third law - sometimes referred to as the law of harmonies - compares the orbital period and radius of orbit of a planet to those of other planets. Unlike Kepler's first and second laws which describe the motion characteristics of a single planet, the third law makes a comparison between the motion characteristics of different planets. The comparison being made is that the ratio of the squares of the periods to the cubes of their average distances from the sun is the same for every one of the planets. As an illustration, consider the orbital period and average distance from sun (orbital radius) for Earth and mars as given in the table below. Dist. (m) Earth 3.156 x 107 s 1.4957 x 1011 2.977 x 10-19 Mars 5.93 x 107 s 2.278 x 1011 2.975 x 10-19 Observe that the T2/R3 ratio is the same for Earth as it is for mars. In fact, if the same T2/R3 ratio is computed for the other planets, it can be found that this ratio is nearly the same value for all the planets (see table below). Amazingly, every planet has the same T2/R3 ratio. Mercury 0.241 0.39 0.98 Venus .615 0.72 1.01 Earth 1.00 1.00 1.00 Mars 1.88 1.52 1.01 Jupiter 11.8 5.20 0.99 Saturn 29.5 9.54 1.00 Uranus 84.0 19.18 1.00 Neptune 165 30.06 1.00 Pluto 248 39.44 1.00 (NOTE: The average distance value is given in astronomical units where 1 a.u. is equal to the distance from the earth to the sun - 1.4957 x 1011 m. The orbital period is given in units of earth-years where 1 earth year is the time required for the earth to orbit the sun - 3.156 x 107 seconds. ) Kepler's third law provides an accurate description of the period and distance for a planet's orbits about the sun. Additionally, the same law which describes the T2/R3 ratio for the planets' orbits about the sun also accurately describes the T2/R3 ratio for any satellite (whether a moon or a man-made satellite) about any planet. There is something much deeper to be found in this T2/R3 ratio - something which must relate to basic fundamental principles of motion. In the next part of Lesson 4, these principles will be investigated as we draw a connection between the circular motion principles discussed in Lesson 1 and the motion of a satellite. The ancients used to believe everything, the planets etc. revolved around the earth. In people, this belief is called egocentrism. Teenagers and Senior citizens also exhibit this attitude at times. I found your answer on the Internet, I just put Kepler's Law in the browser.
What ocean are shrimp found in?
Srimp are found in about every ocean.
Did Amelia Earhart get found after crash?
nono she was never found
What halogen is found in seawater?
The halogen found in seawater is bromine.
Who found that that planets revolve?
Johannes Kepler
What are the names of the six books that Johannes Kepler Wrote?
A full article on the life of Johannes Kepler can be found in the related link to Wikipedia - including details of his works.
Who found out that the planets follow an elliptical orbit?
Johannes Kepler is credited with that discovery.
What is max or min the acceleration due to gravity experienced by Surface to Air Missile during the flight?
The acceleration due to gravity is almost constant during the entire flight. A minimal difference is found due to altitude, the further away from the center of the earth, the less the gravitational acceleration, so in a SAM the point when the missile is at it's greatest altitude will have the lowest gravitational acceleration component.
How did Johannes Kepler figure out that the planets had an elliptical orbit?
The circular orbits that were being used at the time to model the solar system did not quite work with mathematical predictions or observations. Kepler found that elliptical orbits provided more accurate predictions of where the heavenly bodies would appear in the sky.
Where are gravitational electromagnetic and nuclear forces found?
Any object that has a mass also has a gravitational field. Any object that has a charge has an electrostatic field Any charged particle that is undergoing acceleration has a Magnetic field Nuclear forces are found in the nucleus of atoms holding them together.
Is Kepler a planet?
No. Kepler is a telescope created to find planets orbiting other stars. Planets found using it are given designations beginning with Kepler, such as Kepler 440b.
Where can you found planet Kepler?
There is no such planet
Who is discover that the planet moved in an elliptical orbit?
It was a German astronomer by the name of Johannes Kepler who did a whole lot of geometrical calculations from new and unusually accurate observations made by Tycho Brahe. Kepler showed that the planets each move in an elliptical orbit and he gave three laws describing exactly how they move, and it was found to be much more accurate than the previous models of Ptolemy and Copernicus. He did not know why they behaved as they did and we had to wait until Isaac Newton explained it using his new theory of gravity.
Where is gravitational potential energy found?
gravitational energy is found in your but hole
What can Acceleration be found by?
Acceleration can be found by taking the derivative of a function for velocity, as acceleration is the change in velocity with respect to time.
What is the scientific basis of the heliocentric theory?
Copernicus and later Galileo and Kepler. Venus was found to have phases Jupiter was found to have moons Elliptical orbits which Kepler found would later be described by gravity Start there.
