Find the speed of the first meteoroid when it strikes Earth. Express your answer in kilometers per second. femplates Symbols uado redo reset keyboard shortcuts help, vị = km/s Submit Request Answer Part B Find the speed of the second meteoroid at its closest approach to Earth. Express your answer in kilometers per second. Templates Symbols undo redo reset keyboard shortcuts help. v2 = km/s Submit Request Answer Part C Will the second meteoroid ever return to Earth's vicinity? o yes o no Submit Request Answer

Find the speed of the first meteoroid when it strikes Earth. Express your answer in kilometers per second. femplates Symbols uado redo reset keyboard shortcuts help, vị = km/s Submit Request Answer Part B Find the speed of the second meteoroid at its closest approach to Earth. Express your answer in kilometers per second. Templates Symbols undo redo reset keyboard shortcuts help. v2 = km/s Submit Request Answer Part C Will the second meteoroid ever return to Earth's vicinity? o yes o no Submit Request Answer

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter14: Cosmic Samples And The Origin Of The Solar System

Section: Chapter Questions

Problem 22E: Consider the differentiated meteorites. We think the irons are from the cores, the stony-irons are...

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Again using Appendix F, which planets might you expect to have extreme seasons? Why
At what average distances (in AU) from the Sun would you expect to find Kirkwood gaps where the orbital period of asteroids are respectively four-ninths, and three-sevenths, of the orbital period of Jupiter? (Hint: use Kepler's third law.) Compare your results with the figure.
A typical comet contains some 1013 kg of water ice. How many comets would have to strike Earth in order to account for the roughly 2×1021 kg of water presently found on our planet? (Hint: simple division) If this amount of water accumulated over a period of 500 million years, how frequently must Earth have been hit by comets during that time? (Hint: Calculate, on the average, how many comets hit the Earth per year during that time.)
Procedure Table 11.1 presents Djup and Pday for the major Jovian satellites. First use these data and the equation above to calculate Jupiter’s mass in kilograms (kg). Enter your results in the table for each satellite. Next calculate the average Jupiter mass (Mjup, av) and enter the result in the table. Finally, calculate the percent difference (PD) using Mjup, av and the standard value for Jupiter’s mass (1.9 X 1027 kg). In the calculation of PD you can ignore 1027 because it will appear in both numerator and denominator. ________________________________________________________ Table 11.1 Calculated values for Jupiter’s Mass Satellite Djup Pday Mjup Io 2.95 1.77 Europa 4.69 3.55 Ganymede 7.50 7.15 Callisto 13.15 16.7 __________________________________________________________ Average Jupiter Mass = Percent Difference =
At what average distances (in AU) from the Sun would you expect to find Kirkwood gaps where the orbital period of asteroids are respectively four-ninths, and three-sevenths, of the orbital period of Jupiter? (Hint: use Kepler's third law.) inner gap at_______ AU outer gap at_______ AU
You observe a comet 0.46 AU from Earth with a tail that is 1.7 degrees long. How long is the tail in AU? How long is the tail in kilometers? How many times could the U.S. fit along the length of the tail? (The width of the U.S. is 4,313 km.)
For the following questions, use the data found in Appendix D. Calculate the mass (in kg) of the Sun based on data for Uranus's orbit. (Use G = 6.67 ✕ 10−11 N · m2/kg2 in your calculations. Round your answer to at least four significant figures.) ?_____kg Compare the above calculated value with the Sun's actual mass. (Round your answer to at least three decimal places.) mcalculated mactual = ?_______
How do the risks of dying from the impact of an asteroid or comet compare with other risks we are concerned about, such as dying in a car accident or from heart disease or some other natural cause? (Hint: To find the annual risk, go to the library or internet and look up the annual number of deaths from a particular cause in a particular country, and then divide by the population of that country.)
Using Appendix G, complete the following table that describes the characteristics of the Galilean moons of Jupiter, starting from Jupiter and moving outward in distance. Table A This system has often been described as a mini solar system. Why might this be so? If Jupiter were to represent the Sun and the Galilean moons represented planets, which moons could be considered more terrestrial in nature and which ones more like gas/ice giants? Why? (Hint: Use the values in your table to help explain your categorization.)
Look at the images of Comet Mrkos on the left page of Concept Art: Observations of Comets. Is the comet shown on its way in around the Sun, on its way out, or is it not possible to tell?
Refer to Example 13.1. How would the calculation change if a typical comet in the Oort cloud is larger-say, 50 km in diameter?
Which step(s) listed in the previous question can be eliminated in models that form Jovian planets in thousands of years, a time frame that solves the Jovian problem? Order the following steps in the formation of a Terrestrial planet chronologically: gravitational collapse, accretion, outgassing, condensation, and differentiation.