Universe
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ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
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Chapter 15, Problem 45Q
To determine
The reason due to which comets are generally brighter a few weeks after passing their perihelion.
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If the velocity of the solar wind is about 4.0 ✕ 102 km/s and the visible tail of a comet is 8.0 ✕ 108 km long, how many days does an atom in the solar wind take to travel from the nucleus to the end of the visible tail? (Note: 1 day = 86,400 seconds.)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- If the velocity of the solar wind is about 4.0 ✕ 102 km/s and the visible tail of a comet is 5.0 ✕ 108 km long, how many days does an atom in the solar wind take to travel from the nucleus to the end of the visible tail? (Note:1 day = 86,400 seconds.)arrow_forwardThe asteroid Pallas has a mass of 2.11 x 10^20 kg and an average radius of about 2.6 km (2.56 x 10^2 km) What is the escape velocity in (m/s). (Hint: use the formula for escape velocity; remember to concert units to m, kg, & s). ________ m/s could you jump off the asteroid? -yes -noarrow_forwardWhy do most short-period comets have prograde orbits near the plane of the Solar System?arrow_forward
- 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?arrow_forwardWhat is the difference between a meteoroid and an asteroid? Is there a sharp distinction?arrow_forwardThe calculation in Example 13.1 refers to the known Oort cloud, the source for most of the comets we see. If, as some astronomers suspect, there are 10 times this many cometary objects in the solar system, how does the total mass of cometary matter compare with the mass of Jupiter?arrow_forward
- 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.)arrow_forwardWhat evidence indicates that a comets nucleus is rich in ices?arrow_forward
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