Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 7, Problem 4P
To determine
The density of Moon and the amount of iron in Moon.
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This is a challenging problem. Solve it on paper, writing out each step carefully. When doing calculations, do not round intermediate values.
Note: If you have approached the problem in a principled way, do not abandon your approach if your numerical answer is not accepted; check
your calculations!
This problem is closely related to the spectacular impact of the comet Shoemaker-Levy with Jupiter in July 1994. (More information
about the event can be found here.)
A rock far outside a solar system similar to ours is initially moving very slowly relative to its sun, in the plane of the orbit of a large
planet (about the size of Jupiter) around its sun. The rock falls toward the sun, but on its way to the sun it collides with the planet. The
mass of the planet is 4 x 1027 kg, the mass of its sun is 3.2 x 1030 kg, the radius of the planet is 1.4 x 10® m, and the center-to-center
distance from the planet to the sun is 9.2 x 1011 m.
Part 1
(a) Calculate the rock's speed just before it…
Pluto has been hard to measure from Earth because of the atmosphere. In 2007 Young and Buie measured Pluto as having a diameter of 2322 km. In 2015 the New Horizons probe reached pluto and measured it up close and we now know the actual diameter is 2372 km. What was the percent error of the 2007 measurement? Enter your answer as a percent with a negative value if the 2007 measurement was too small and a positive value if it was too large.
What is the density of Jupiter’s moon Europa (see Appendix G for data on moons)?
Chapter 7 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 7 - Describe a crater and how it is formed. Why do...Ch. 7 - How do the maria differ from the highlands?Ch. 7 - Prob. 3QFRCh. 7 - What formed the maria? Why are they smooth?Ch. 7 - Prob. 5QFRCh. 7 - Prob. 6QFRCh. 7 - Why does the Moon lack an atmosphere?Ch. 7 - Prob. 8QFRCh. 7 - How do astronomers think the Moon formed? What...Ch. 7 - Why is the Moons surface heavily cratered but...
Ch. 7 - Prob. 11QFRCh. 7 - Prob. 12QFRCh. 7 - Prob. 13QFRCh. 7 - Highway surfaces develop potholes over time. How...Ch. 7 - Bergmanns rule states that individuals of a given...Ch. 7 - Prob. 3TQCh. 7 - Why will an astronauts footprint on the Moon last...Ch. 7 - Prob. 5TQCh. 7 - Prob. 6TQCh. 7 - If the day were 12 hours long, what would be the...Ch. 7 - Prob. 8TQCh. 7 - Why do tides happen about an hour later each day?Ch. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 1TYCh. 7 - Prob. 2TYCh. 7 - Prob. 3TYCh. 7 - Prob. 4TYCh. 7 - Prob. 5TYCh. 7 - Prob. 6TY
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- Look at Appendix F and Appendix G and indicate the moon with a diameter that is the largest fraction of the diameter of the planet or dwarf planet it orbits.arrow_forwardThe mass of the planet is approximately 74.8 times the mass of Jupiter. Calculate the average density of the planet. Give your answer in grams per cubic centimeter.arrow_forwardCompute for the scale height of a certain planet's atmosphere (the height the atmosphere would have if its density stayed constant instead of decreasing with altitude.) express your answer in meters. No unit is required for the final answer. radius of the planet = 6,371 km : density of air = 1.21 kg/m^3 Please answer asap.arrow_forward
- Calculate the escape velocity of the Moon from its mass and diameter. Hint: Use the formula for escape velocity,arrow_forwardAt perigee, the Moon is 365,000 km from Earth. At apogee, it is 407,000 km away. How many times larger does the Moon appear to us during perigee than at apogee? The linear diameter of the Moon is 3,480 km.arrow_forwardThe value we have just calculated is the combined masses of Jupiter and Callisto! Their mass is in units of the Sun's Mass (MS) - we can convert this to units which are more familiar to us like kilograms by multiplying this answer by the scale factor (1.99x1030 kg/1 MS): (MJupiter + MCallisto) = ( MS) (1.99x1030 kg/1 Solar Mass) = _______x_10___ kg (I have already written the x 10 so you are reminded to write the exponenet of 10 in the scientific notation expression of your answer). Since you know from looking at pictures of Jupiter with its Galilean Satellites (look in your book at a picture if you have not already), that Callisto is much smaller than Jupiter - in fact it is less than 0.001 of Jupiter's size or mass, so the number we have just calculated for (MJupiter + MCallisto) is almost the same as MJupiter . How much more massive is Jupiter than the Earth? (The mass of Earth is about 5.98 x 1024 kg)arrow_forward
- Pure, solid water ice has an albedo A≈0.35. What is the minimum distance from the Sun at which a rapidly rotating ice cube would remain frozen? Between which two planets does this distance lie?arrow_forwardI am stuck on where to start with this question... 2. a. For two moons, (Moon A and Moon B) with the same mass, both in circular orbits about Mars, how many times more quickly or slowly is Moon B moving along its orbit if it 9 times farther from Mars' center than Moon A? b. Now if Moon A is 4 times more massive that Moon B, how much faster or slower will Moon B's orbital velocity be (relative to that of Moon A)?arrow_forwardYou can determine the radius of a planet by measuring the change in the flux coming from the star (i.e. the transit method). If the radius of the planet increases, the overall flux decreases, but what happens to the change in the flux? Hint: the change in a quantity is represented by the uppercase delta or triangle symbol. Group of answer choices - Increases - Decreases - Stays constant - Fortnitearrow_forward
- Do you think the Moon could retain an atmosphere of nitrogen for the age of the Solar System? Explain why or why notarrow_forwardJupiter is approximately a sphere of radius 6.99 x 107 m.(a) What is its circumference in kilometers?(b) What is its surface area in square kilometers?(c) What is its volume in cubic kilometers? Needs Complete typed solution with 100 % accuracy.arrow_forwardThe diameter of the Sun is 865,380 miles across while Saturn's diameter is 72,368 miles across. The Sun is _____times bigger than Saturn (give whole number as your answer!). If we could shrink Saturn down to a size of a cherry (diameter is 1 inch across), then Sun would be as big as ______. Use one of the following objects as your answer. Watermelon (average size is 12 inches across) Basketball (average size is 9.5 inches across) Average Halloween pumpkin (average size is 15 inches across) Pumpkin at the Puyallup fair (average size is 40 inches across)arrow_forward
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