Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 9, Problem 17Q
To determine
The fraction of Earth’s mass that comprises its inner core.
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The average density of the earth is 5.52 g/cm3. What is its density in ug/mm3
Earth's mass ia 6x10^24 kg and its radius is 6.4x10^6 m.
What is the average mass density of Earth?
The density of the rocks compromising Earth's outermost layer (its "crust") ranges from 2000 to 3500 kg/m ^3.
Based on your answer, what can you conclude about the material deep inside Earth's interior?
The figure shows, not to scale, a cross section through the interior of Earth. Rather than
being uniform throughout, Earth is divided into three zones: an outer crust, a mantle, and an
inner core. The dimensions of these zones and the masses contained within them are shown
on the figure. Earth has a total mass of 5.98 x 1024 kg and a radius of 6370 km. Ignore
rotation and assume that Earth is spherical. (a) Calculate ag at the surface. (b) Suppose that a
bore hole (the Mohole) is driven to the crust-mantle interface at a depth of 25.0 km; what
would be the value of ag at the bottom of the hole? (c) Suppose that Earth were a uniform
sphere with the same total mass and size. What would be the value of ag at a depth of 25.0
km? (Precise measurements of ag are sensitive probes of the interior structure of Earth,
although results can be clouded by local variations in mass distribution.)
6345 km
(a) Number
(b) Number
25 km
Number i
3490 km
-Core, 1.93 x 1024 kg
Mantle, 4.01 × 1024 kg
Crust,…
Chapter 9 Solutions
Universe
Ch. 9 - Prob. 1CCCh. 9 - Prob. 2CCCh. 9 - Prob. 3CCCh. 9 - Prob. 4CCCh. 9 - Prob. 5CCCh. 9 - Prob. 6CCCh. 9 - Prob. 7CCCh. 9 - Prob. 8CCCh. 9 - Prob. 9CCCh. 9 - Prob. 10CC
Ch. 9 - Prob. 11CCCh. 9 - Prob. 12CCCh. 9 - Prob. 13CCCh. 9 - Prob. 14CCCh. 9 - Prob. 1CLCCh. 9 - Prob. 2CLCCh. 9 - Prob. 3CLCCh. 9 - Prob. 1QCh. 9 - Prob. 2QCh. 9 - Prob. 3QCh. 9 - Prob. 4QCh. 9 - Prob. 5QCh. 9 - Prob. 6QCh. 9 - Prob. 7QCh. 9 - Prob. 8QCh. 9 - Prob. 9QCh. 9 - Prob. 10QCh. 9 - Prob. 11QCh. 9 - Prob. 12QCh. 9 - Prob. 13QCh. 9 - Prob. 14QCh. 9 - Prob. 15QCh. 9 - Prob. 16QCh. 9 - Prob. 17QCh. 9 - Prob. 18QCh. 9 - Prob. 19QCh. 9 - Prob. 20QCh. 9 - Prob. 21QCh. 9 - Prob. 22QCh. 9 - Prob. 23QCh. 9 - Prob. 24QCh. 9 - Prob. 25QCh. 9 - Prob. 26QCh. 9 - Prob. 27QCh. 9 - Prob. 28QCh. 9 - Prob. 29QCh. 9 - Prob. 30QCh. 9 - Prob. 31QCh. 9 - Prob. 32QCh. 9 - Prob. 33QCh. 9 - Prob. 34QCh. 9 - Prob. 35QCh. 9 - Prob. 36QCh. 9 - Prob. 37QCh. 9 - Prob. 38QCh. 9 - Prob. 39QCh. 9 - Prob. 40QCh. 9 - Prob. 41QCh. 9 - Prob. 42QCh. 9 - Prob. 43QCh. 9 - Prob. 44QCh. 9 - Prob. 45QCh. 9 - Prob. 46QCh. 9 - Prob. 47QCh. 9 - Prob. 49QCh. 9 - Prob. 51QCh. 9 - Prob. 52Q
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- The energy released in an aftershock is 1/8 of that in an earthquake with a magnitude of 7.2 on the Richter scale. Find the magnitude of the aftershock on the Richter scale. (Give your answer correct to 1 decimal place.)arrow_forwardAn earthquake occurs 6,875 km from a seismograph. The P-waves arrive 11.6 minutes later. How fast is the P-wave traveling (in km/s)? If the lag time between P- and S-waves is 10.8 minutes, how fast are the S-waves traveling (in km/s)? Using the shadow of S-waves you determine that the radius of the core is 55% of the Earth's 6,378-km radius. How many kilometers from the surface is this (in km)? To calculate how fast the P-waves are traveling, we need to divide the distance the waves travel by the time. vP = d s vP = km/sarrow_forwardThe Grinnell Glacier in Glacier National Park had a surface area of 1,020,009 square meters in 1966. Its area was 615,454 square meters in 2005. The 2005 surface area is what percentage of the 1966 surface area?arrow_forward
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