Which of these can happen to objects in the solar system that do not have the momentum to maintain a stable orbit around the sun? Select the two correct answers.(1 point)
Responses
They can fall into circular orbits.
They can fall into circular orbits.
They can follow erratic orbits that take on different shapes.
They can follow erratic orbits that take on different shapes.
They can swing around the sun and be ejected outward into space.
They can swing around the sun and be ejected outward into space.
They can spiral into the sun.
They can spiral into the sun.
The correct answers are:
1. They can swing around the sun and be ejected outward into space.
2. They can spiral into the sun.
The two correct answers are:
1. They can follow erratic orbits that take on different shapes.
2. They can spiral into the sun.
Objects in the solar system that do not have enough momentum to maintain a stable orbit around the sun can experience these two outcomes. Let me explain how:
1. Erratic orbits: If an object does not have enough momentum to sustain a stable orbit, it can follow erratic orbits that take on different shapes. These orbits may be elongated, elliptical, or even parabolic. The object's trajectory will not be predictable or consistent.
2. Spiraling into the sun: Objects without enough momentum can also spiral into the sun. As they move closer to the sun, the gravitational force becomes stronger, which pulls them inward. This gravitational pull causes them to lose energy and spiral deeper and closer towards the sun's surface, eventually being consumed by it.
It's important to note that objects can't "fall" into circular orbits, as mentioned in the list. Circular orbits require a specific balance of speed and distance from the sun to maintain a stable orbit. So, the statements "They can fall into circular orbits" are incorrect in this context.
In summary, for objects in the solar system without enough momentum, they can follow erratic orbits and spiral into the sun.
The correct answers are:
- They can follow erratic orbits that take on different shapes.
- They can spiral into the sun.
Which statements about geocentric model and heliocentric model are true? Select the two correct answers.(1 point)
Responses
They both are models of the solar system.
They both are models of the solar system.
They both show the position of Earth relative to the Sun.
They both show the position of Earth relative to the Sun.
They both show Earth at the center of the solar system.
They both show Earth at the center of the solar system.
They both show the Sun at the center of the solar system.
The two correct answers are:
1. They both are models of the solar system.
2. They both show Earth at the center of the solar system.
For a planet orbiting the sun, rp is the distance from the sun to the perihelion and ra is the distance from the sun to the aphelion. What is a planet’s orbital eccentricity if rp is equal to 0.45ra?(1 point)
Responses
0.38
0.38
2.64
2.64
1.45
1.45
0.55
To calculate the orbital eccentricity, we can use the following formula:
eccentricity (e) = (ra - rp) / (ra + rp)
Given that rp is equal to 0.45ra, we can substitute it into the formula:
eccentricity (e) = (ra - 0.45ra) / (ra + 0.45ra)
Simplifying the formula:
eccentricity (e) = 0.55ra / 1.45ra
The ra and ra cancel out, leaving us with:
eccentricity (e) = 0.55 / 1.45
Calculating the value:
eccentricity (e) = 0.3793
Rounding to two decimal places, we get:
eccentricity (e) ≈ 0.38
Therefore, the correct answer is 0.38.
Drag and drop the words into the correct locations.(2 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
The Copernican model of the solar system was a [answer] model in which Earth [answer]. Planets [answer], and the stars [answer].
Answers
were fixed to an outermost sphere
were fixed to an outermost sphere
travelled along a circular path
travelled along a circular path
heliocentric
heliocentric
floated in outerspace
floated in outerspace
geocentric
geocentric
was just another planet
was just another planet
The Copernican model of the solar system was a [heliocentric] model in which Earth [was just another planet]. Planets [travelled along a circular path], and the stars [were fixed to an outermost sphere].
Which of the following is the best definition of Newton's theory of universal gravitation?(1 point)
Responses
Every object attracts every other object in the universe, with a force that increases as the objects' masses decrease and the distance between them increases.
Every object attracts every other object in the universe, with a force that increases as the objects' masses decrease and the distance between them increases.
Every object attracts every other object in the universe, with a force that increases as the objects' masses increase and the distance between them decreases.
Every object attracts every other object in the universe, with a force that increases as the objects' masses increase and the distance between them decreases.
Every object is attracted to the Earth with a force that increases with increasing mass and distance.
Every object is attracted to the Earth with a force that increases with increasing mass and distance.
Every object is pulled downward with a force that increases as the height from which an object is dropped increases.
Every object is pulled downward with a force that increases as the height from which an object is dropped increases.