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- 1. Multiple Choice
Two satellites of equal mass are in circular orbit around a planet. Satellite b is twice as far out. Which feels a stronger gravitational force?
Satellite a
Satellite b
Both the same
- 2. Multiple Choice
Two satellites of equal mass are in circular orbit around a planet. Satellite b is twice as far out. How much stronger is the planet’s gravity on satellite a (compared to satellite b)?
2× as much
3× as much
4× as much
5× as much
- 3. Multiple Choice
What did Newton say about the gravitational force between distant objects?
It is independent of distance
It is inversely related to distance squared
It is proportional to distance squared
It is inversely related to mass squared
It is zero, unless the objects are touching
- 4. Multiple Choice
Why do astronauts in this space shuttle feel weightless?
They are in free fall, at the same rate as the shuttle
There is an equal force pulling them away from Earth
The gravity at that distance is too small to feel
They pull on Earth as hard as it pulls on them
- 5. Multiple Choice
Which diagram best shows the gravitational interaction between Earth and a satellite?
- 6. Multiple Choice
Earth pulls satellite, and satellite pulls Earth. Which of the forces is stronger?
Earth pulling satellite
Satellite pulling Earth
Both the same
Not enough information to determine
- 7. Multiple Choice
A student standing on Earth's surface weighs 100 pounds. How much would he weigh standing on a ladder as tall as Earth's radius?
400 pounds
200 pounds
100 pounds
50 pounds
25 pounds
- 8. Multiple Choice
You want to launch a satellite into Earth orbit. You already know Earth’s mass, and the satellite’s mass. What additional information do you need to calculate the gravitational force that will act on it?
The height it will have
The acceleration of gravity at the surface
Earth's distance from the Sun
The satellite's size
- 9. Multiple Choice
The value of eccentricity can range from ________ to ________.
0.1 to 0.9
-1 to 0
0 to 100
0 to 1
- 10. Multiple Choice
The planets in our solar system all have ______________ orbits.
spherical
elliptical
circular
highly eccentric
- 11. Multiple Choice
An orbit with the eccentricity of 0.9 would have more of a(n) __________ shaped orbit.
spherical
elongated
circular
spiral
- 12. Multiple Choice
Which statement best describes Kepler’s 2nd Law of Planetary Motion?
Planets revolve around the sun over equal areas in equal time intervals.
Planetary orbits are in the shape of an ellipse.
A planet’s orbital period is proportionate to its distance from the sun.
- 13. Multiple Choice
Which statement best describes Kepler’s 3rd Law of Planetary Motion?
The closer a planet is to the sun, the shorter the orbital period is.
Planetary orbits are in the shape of an ellipse
The closer a planet is to its star, the lesser its orbital velocity.
- 14. Multiple ChoiceThe image, observed in a telescope, is _____bigger than the objectthe same size as the objectslightly smaller than the objectmuch smaller than the object
- 15. Multiple ChoiceIn general the bigger the telescope's objective the better your _____resolutionmagnificationattitudeorientation
- 16. Multiple ChoiceWhat do modern professional-grade optical telescopes use as their objective?lensesmirrorselectronic detectorsphotographic film
- 17. Multiple ChoiceWhat kind of detector is used for radio waves?a refracting telescopea metal disha reflecting telescopea digital camera
- 18. Multiple Choice
{{What is the average distance from the Sun for a planet with an orbital period of 21 years?}}
Which formula should you use?
P2 = a3
MP2 = a3
(M+m)P2 = a3
Fg = GMm/(r2)
- 19. Multiple Choice
Planets outside our Solar System are called...
Exoplanets
Trans-Neptunian Objects
Dwarf Planets
Worlds
- 20. Multiple ChoiceEccentricity is equal to:'c' times 'a''a' divided by 'c''c' divided by 'a'mc2
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