Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Question
Chapter 15, Problem 41Q
To determine
The reason due to which the ion tail and the dust tail of a comet point in different directions.
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Calculate the orbital period of a comet nucleus in the Oort cloud.
Annual meteor showers occur when the Earth passes through the orbital path of acomet. The intensity of these showers vary from year to year. Which of the following may bethe reason for this?
Group of answer choices
- Meteor showers are not caused by comet debris
- Sun's temperature
- en distribution of debris along comet's orbit
- Earth's rotation axis
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? 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?
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Universe
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- What is the difference between a comets dust tail and a comets gas tail? What does that tell you about the composition and origin of comets?arrow_forwardWhat is the orbital period of a comet nucleus at the inner edge of the Oort Cloud? What is its orbital velocity? Assume a circular orbit. (Hint: Use Keplers third law, Eq. 4-1) (Note: The circumference of a circle is 2r.)arrow_forwardHow 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.)arrow_forward
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