Question

The mass of an object doubles. What happens to the gravitational force between it and another object whose mass stays the same, assuming they remain the same distance apart?
The amount of the gravitational force remains the same. The amount of the gravitational force remains the same. The amount of the gravitational force quadruples. The amount of the gravitational force quadruples. The amount of the gravitational force decreases by one-half. The amount of the gravitational force decreases by one-half. The amount of the gravitational force doubles.

Answer 1

Which did Kepler notice about planetary motion that caused him to propose Kepler’s first law of orbital motion?
Most planets have highly elliptical orbits. Most planets have highly elliptical orbits. The planets have circular orbits. The planets have circular orbits. The distance between Mars and the sun is constant. The distance between Mars and the sun is constant. The distance to the sun varies.

Answer 2

Which are features of Copernicus's model of the solar system? Select the three correct answers.
The outer planets move in epicycles. The outer planets move in epicycles. Earth is fixed to a crystalline sphere. Earth is fixed to a crystalline sphere. The stars are fixed to an outer sphere. The stars are fixed to an outer sphere. The planets move in perfect circles. The planets move in perfect circles. All planets orbit the Sun at the same speed. All planets orbit the Sun at the same speed. The Sun is at the center.

Answer 3

In 3-5 sentences, analyze why Aristotle's and Ptolemy's models were accepted for more than a thousand years in spite of being completely incorrect. In your answer, use the term geocentric.

Answer 4

Which statements about the geocentric model are false? Select the two correct answers.
It shows the Sun at the center of the solar system. It shows the Sun at the center of the solar system. It shows Earth at the center of the solar system. It shows Earth at the center of the solar system. It explains why Mars appears to move backward for a few months approximately every two years. It explains why Mars appears to move backward for a few months approximately every two years. It shows the orbits of the planets as circular.

Answer 5

The amount of the gravitational force doubles.

Answer 6

The planets have elliptical orbits.

Answer 7

The three correct answers are:

1. The stars are fixed to an outer sphere.
2. The planets move in perfect circles.
3. The Sun is at the center.

Answer 8

Aristotle's and Ptolemy's geocentric models were accepted for a significant period of time due to a combination of factors. Firstly, the geocentric model provided a relatively simple and intuitive explanation for the observed motions of celestial bodies. Additionally, these models were in line with the philosophical and religious beliefs of the time, where Earth was perceived as the center of the universe. Furthermore, there was a lack of technological advancements and accurate measurements to disprove these models for a long time. As a result, the geocentric models persisted despite their inaccuracies until significant scientific advancements, such as those made by Copernicus and Galileo, eventually demonstrated the heliocentric nature of our solar system.

Answer 9

The two false statements are:

1. It shows the Sun at the center of the solar system.
2. It shows the orbits of the planets as circular.

The geocentric model places Earth at the center of the solar system and explains the apparent retrograde motion of planets like Mars through the use of epicycles. Additionally, the geocentric model depicts the orbits of the planets as circular.