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 6, Problem 3P
To determine
The average density of the alloy.
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Earth's surface area is 5.10x10^8 km^2 .Earth's crust has a thickness (or depth) of 35 km and density 2.8 g/cm^3 for earth's crust.
a) Calculate the volume of earth's crust in km^3
b) Express your answer from part (a) in cm^3
c) Calculate the mass of the crust tons (t) : 1 ton=1000kg
d) Silicon's concentration in earth's crust is 2.72x105grams/ton. Calculate the mass of silicon (in grams) present in earth's crust.
An igneous rock contains a radioactive Isotope that has a half life of 10 million years. Careful analysis shows that only one quarter of the original concentration of the parent isotope is left. How old is the igneous rock ?
What percentage of Earth's volume is the metallic core?
Note: The volume of a sphere is
4
3
πr3.
Assume the Earth has a radius of 6.38 103 km, and the core has a radius of 3.51 103 km.
........%
Chapter 6 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 6 - Prob. 1QFRCh. 6 - Prob. 2QFRCh. 6 - How do we know that Earth has a liquid core? Why...Ch. 6 - Prob. 4QFRCh. 6 - Prob. 5QFRCh. 6 - Prob. 6QFRCh. 6 - Prob. 7QFRCh. 6 - On what plate of the crust are you located? Which...Ch. 6 - Prob. 9QFRCh. 6 - Prob. 10QFR
Ch. 6 - Prob. 11QFRCh. 6 - How does the fact that Earth has a magnetic field...Ch. 6 - Prob. 13QFRCh. 6 - Prob. 14QFRCh. 6 - Prob. 15QFRCh. 6 - Prob. 16QFRCh. 6 - Prob. 17QFRCh. 6 - Prob. 1TQCh. 6 - Submarines contain ballast tanks that can take on...Ch. 6 - According to the Guinness Book of Mountains and...Ch. 6 - Flicking your finger against your cheek makes a...Ch. 6 - How does the eventual acceptance of the plate...Ch. 6 - If Earth rotated more slowly, would you expect it...Ch. 6 - Prob. 7TQCh. 6 - Prob. 8TQCh. 6 - Prob. 9TQCh. 6 - Suppose Earths radius were only half of its real...Ch. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 1TYCh. 6 - Prob. 2TYCh. 6 - Prob. 3TYCh. 6 - Prob. 4TYCh. 6 - Prob. 5TYCh. 6 - Prob. 6TYCh. 6 - Prob. 7TYCh. 6 - Prob. 8TYCh. 6 - Prob. 9TYCh. 6 - Prob. 1EQFRCh. 6 - Prob. 2EQFRCh. 6 - Prob. 3EQFRCh. 6 - Prob. 4EQFRCh. 6 - Prob. 5EQFRCh. 6 - Prob. 6EQFRCh. 6 - Prob. 7EQFRCh. 6 - Prob. 1ETQCh. 6 - Prob. 2ETQCh. 6 - Prob. 3ETQCh. 6 - Prob. 4ETQCh. 6 - Prob. 5ETQCh. 6 - Prob. 1EPCh. 6 - Prob. 2EPCh. 6 - Prob. 3EPCh. 6 - Prob. 4EPCh. 6 - Prob. 1ETYCh. 6 - Prob. 2ETYCh. 6 - Prob. 3ETYCh. 6 - Prob. 4ETY
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- Earth's surface area is 5.10x10^8 km^2 .Earth's crust has a thickness (or depth) of 35 km and density 2.8 g/cm^3 for earth's crust. d) Silicon's concentration in earth's crust is 2.72x105grams/ton. Calculate the mass of silicon (in grams) present in earth's crust.arrow_forwardThe Hawaiian-Emperor chain of undersea volcanoes is about 7500 km long, and the Pacific plate is moving 9.2 cm a year. How old is the oldest detectable volcano in the chain? What has happened to older volcanoes in the chain?arrow_forwardExplain briefly how the following phenomena happen on Earth, relating your answers to the theory of plate tectonics A. earthquakes B. continental drift C. mountain building D. volcanic eruptions E. creation of the Hawaiian island chainarrow_forward
- Europe and North America are moving apart by about 5 m per century. As the continents separate, new ocean floor is created along the mid-Atlantic Rift. If the rift is 5000 km long, what is the total area of new ocean floor created in the Atlantic each century? (Remember that 1km=1000m .)arrow_forwardH does the increasing abundance of CO2 in Earth’s atmosphere cause a rise in Earth’s temperature’arrow_forwardApproximately how much mass (in kg) is in the liquid outer core? Region Percent Mass Temperature Density Crust 0.5% 500 K Mantle 67.0% 3,000 K Outer Core 30.8% 5,200 K 10.9 g/cm^3 Inner Core 1.7% 5,700 Karrow_forward
- The half-life of carbon-14 is 5,730 years. Suppose a fossil is found with 30 percent as much of its carbon -14 as compared to a living sample. How old is the fossil?arrow_forwarda parent isotope has a half-life of 500,000 years. if a rock contained 10mg of the parent isotope when it formed, how much parent isotope would be left after 1.5 million years?arrow_forwardIf a tectonic plate is moving at 8.4 cm per year and a string of volcanoes appearing in the middle of the plate is 4,000 km long, how old is the oldest volcano (in millions of years)?arrow_forward
- A radioactive isotope has a half-life of 1.2 billion years. As measured by the presence of the isotope and its stable decay product, a rock originally contained 10 grams of the radioactive isotope, and now contains 1.25 grams. Approximately how many years old is the rock?arrow_forwardThe temperature of the Earth's inner core is about 4,300oC, and the average temperature of the Earth's surface is about 15oC. Therefore the temperature of the Earth decreases by about _________ oC from the middle of the inside to the outside.arrow_forwardGeophysicists today generally attribute the existence of the earth’s magnetic field to… a. convection currents within the earth’s outer core liquid interior b. the earth's solid iron core c. iron ore deposits in the crust d. cosmic rays from the sunarrow_forward
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