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Archy [21]
3 years ago
15

1. Kepler's three laws resulted from his careful analysis of ____ data, and were not derived from a mathematical model.

SAT
1 answer:
Sav [38]3 years ago
7 0
<h2>1. Right answer: Observational </h2>

Kepler formulated the three laws of planetary motion <u>from observations made by</u> the Danish astronomer <u>Tycho Brahe of the orbit of Mars. </u>

These laws were enunciated to mathematically describe the movement of the planets in their orbits around the Sun. However, the scientific resources existing in his time did not allow him to prove these laws. It was Newton who did it after having developed the Differential and Integral Calculus and formulating the Laws of Universal Gravitation.

<h2>2.  Right answer: Aristotelian </h2>

Aristotle mistakenly thought that the Earth was the center of the universe, thus establishing a <u>geocentric cosmological model. </u>

According to this model, Aristotle proposed that the universe (the cosmos) was spherical and finite, with the Earth immobile at its center, composed of the four fundamental elements (made up of spherical layers): ground, water, air and fire; and the Sun along with the fixed planets in their respective concentric spheres revolving around the Earth. The outermost sphere being that of the stars and all these external elements being made of a fifth element which he called ether.

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4 0
3 years ago
Help me please I need help
exis [7]
Since you know a = 5√2, start by plugging that into your other equation, 2a = √2x to get an equation where x is the only variable you need to solve for:
2a =  \sqrt{2x} \\&#10;2(5 \sqrt{2} ) =  \sqrt{2x}\\&#10;10 \sqrt{2} = \sqrt{2x}

There are two ways of solving for x:
1) Remember when you simplify radicals, you break what's underneath the radical into smaller factors. If a factor repeats under the square root, you can take two of them out and put one of them outside the radical sign (see picture for example). For this problem, you would be doing the reverse of simplifying. You have a 10 on the outside on the left of the equal sign, but a 2 underneath on both sides. If the 10 was taken out, that means there had to be two 10's underneath the radical to begin with. Those two tens would have been multiplied since they are factors, so 10 x 10 = 100. That means x = 100. 

2) Solve it algebraically. Square both sides, simplify, then divide by 2:
10 \sqrt{2} = \sqrt{2x}\\&#10;(10 \sqrt{2})^{2} = ( \sqrt{2x})^{2}\\&#10;100*2 = 2x\\&#10;200 = 2x\\&#10;x = 100\\

Answer: x = 100

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3 years ago
The probability that event b will occur, given that event a has occurred, is called its ____ probability.
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mutually exclussive event

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2 years ago
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Having a child restraint violation is 3 points off your license
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