McGraw-Hill OnlineMcGraw-Hill Higher EducationLearning Center
Student Center | Instructor Center | Information Center | Home
Interactives
Additional Animations
Astronomy Timeline
Career Center
Universally Speaking
Additional Weblinks
Message Board
Constellation Quiz
NetTutor
Outline
Chapter Overview
Essay Questions
Questions for Review
Problem Solving
Online Quiz
Flashcards
Crossword Puzzle
Web Tutorial
Animations
Web Links
Feedback
Help Center


Explorations: Stars, Galaxies, and Planets
Thomas Arny, University of Massachusetts
The Earth

Problem Solving



1

Given that Pluto’s mass is 1.3 x 1025 grams and its radius is 1.1 x 108 centimeters, what is its average density? Does this indicate that Pluto has a large iron core like the Earth? Why?
2

Seismic waves are partly reflected when they cross a boundary such as that between the mantle and the liquid core. Suppose that a P wave has a constant velocity of 8.0 km/sec. Suppose further that 700 seconds (about 12 minutes) after an earthquake near the surface, a seismometer detects a reflected P wave. How far below the surface is the liquid core–mantle boundary? Compare your answer to the distance in figure 12.7. Hint: Remember this is an echo.








Copyright2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.