Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 8, Problem 25E
Over the entire Earth, there are 60,000 km of active rift zones, with average separation rates of 5 m/ century. How much area of new ocean crust is created each year over the entire planet? (This area is approximately equal to the amount of ocean crust that is subducted since the total area of the oceans remains about the same.)
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
HEIGHT OF A CONTINENT ABOVE THE MANTLE. In the figure below, a
simple model considers a continent as a block (density = 2,800 kg/m^3)
floating in the mantle (density = 3,300 kg/m3). Assuming the continent is
35 km thick (the average thickness of the Earth's crust), estimate the
height (in km) of the continent above the surrounding mantle.
Continent
(density = 2800 kg/m3)
mg
Mantle rock (density = 3300 kg/m³)
5.3.
7.4.
9.8
12.
17.
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?
An 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/s
Chapter 8 Solutions
Astronomy
Ch. 8 - What is the thickest interior layer of Earth? The...Ch. 8 - What are Earth’s core and mantle made of? Explain...Ch. 8 - Describe the differences among primitive, igneous,...Ch. 8 - Explain briefly how the following phenomena happen...Ch. 8 - What is the source of Earth’s magnetic field?Ch. 8 - Why is the shape of the magnetosphere not...Ch. 8 - Although he did not present a mechanism, what were...Ch. 8 - List the possible interactions between Earth’s...Ch. 8 - List, in order of decreasing altitude, the...Ch. 8 - In which atmospheric layer are almost all...
Ch. 8 - What is, by far, the most abundant component of...Ch. 8 - In which domain of living things do you find...Ch. 8 - Describe three ways in which the presence of life...Ch. 8 - Briefly describe the greenhouse effect.Ch. 8 - How do impacts by comets and asteroids influence...Ch. 8 - Why are there so many impact craters on our...Ch. 8 - Detail some of the anthropogenic changes to...Ch. 8 - If you wanted to live where the chances of a...Ch. 8 - Which type of object would likely cause more...Ch. 8 - If all life were destroyed on Earth by a large...Ch. 8 - Why is a decrease in Earth’s ozone harmful to...Ch. 8 - Why are we concerned about the increases in CO2...Ch. 8 - Do you think scientists should make plans to...Ch. 8 - Europe and North America are moving apart by about...Ch. 8 - Over the entire Earth, there are 60,000 km of...Ch. 8 - With the information from Exercise 8.25, you can...Ch. 8 - What is the volume of new oceanic basalt added to...Ch. 8 - Suppose a major impact that produces a mass...Ch. 8 - How do the risks of dying from the impact of an...Ch. 8 - What fraction of Earth’s volume is taken up by the...Ch. 8 - Approximately what percentage of Earth’s radius is...Ch. 8 - What is the drift rate of the Pacific plate over...Ch. 8 - What is the percent increase of atmospheric CO2 in...Ch. 8 - Estimate the mass of the object that formed Meteor...
Additional Science Textbook Solutions
Find more solutions based on key concepts
7. (II) A mass mat the end of a spring oscillates with a frequency of 0.83 Hz. When an additional 780-g mass is...
Physics: Principles with Applications
Write each number in scientific notation.
12. 0.00224
Applied Physics (11th Edition)
51. A 50 kg box hangs from a rope. What is the tension in the rope if
a. The box is at rest?
b. The box has Vy ...
College Physics: A Strategic Approach (4th Edition)
Estimate the average temperature of the air inside a hot-air balloon (see Figure 1.1). Assume that the total ma...
An Introduction to Thermal Physics
How have recent discoveries led scientists to modify the nebular theory? What implications do these modificatio...
Life in the Universe (4th Edition)
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
Knowledge Booster
Learn more about
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
- The glaciers of Greenland have a total area of approximately 18 × 10^12 ft^2 and an average depth of 1.0 mile. What is the volume of water that would be released if all the glaciers were to melt? Given that oceans cover 70% of planet earth and the earth radius is approximately 6,371 kilometers, how much would ocean levels rise? (Neglect differences in the density between ice and water and changes in ocean coverage upon rising sea levels)arrow_forwardAntarctica is roughly semicircular in shape, with a radius of 2000 km. The average thickness of the ice cover is 3000 m. How many metric tons (1metric ton = 1000 kg) of ice cover Antarctica? (Consider: density of ice = 0.919 gram per cubic centimeter)arrow_forwardThe Greenland ice sheet extends 1.7e12 m2, and average 2,100 meter thick. The area of the world oceans is 360e12 m2. Assume ice and water have about the same density. The sea level will rise _____ meter if the Greenland ice sheet is all melted.arrow_forward
- Grinnell Glacier is a glacier within Glacier National Park. In 1850, the area of the Grinnell Glacier was 2,329,918 square miles. By 1950, its mass had dropped to 1,336,855 square miles. How much area has been lost by the glacier between 1850 to 1950, measured in square kilometers?arrow_forwardEurope 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_forwardThe Earth has an approximate mass of 5.97*10^24 kg and a radius of 6,300 km. If the crust accounts for 31% of the mass and its radius is 2 times smaller, then the density of the core in kg/m3 must be approximatelyarrow_forward
- The average elevation of Arabian peninsula (freeboard) is f=400 m. Considering that the oceanic crust is h=5 km of thickness and the sea average depth is D= 3700 m. (pc=2700 kg/m3, po=3000 kg/m3, pm=3300 kg/m3 pw=1000 kg/m3) What is the thickness H of the continental crust. B. If the Musandam has an average elevation of 800 m. How much is the thickness below Musandam considering stacking of sedimentary layers and not erosion.arrow_forwardThe Earth's mid-ocean ridges create about 1.029 cm of new crust over their 1943 km length every year. How much new crustal area (in km2) will this process create in 108 years?arrow_forwardThe Richter Soale is a simple equation for measuring intensity of an earthquake, according to the formula R=log(I), where I is Intensity of an earthquake and Ris the Richter scale rating. The largest earthquake in the year 2006 was in the ocean that was recorded as an 8.3 on the Richter Scale. The most devastating earthquake was in a major city that registered 6.6 on the Richter Scale. How many times more intense was the quake in the ocean? a) The intensity of the 8.3 earthquake was: You can write it as a power of 10 b) The intensity of the 6.6 earthquake was: FYou can write it as a power of 10} c) The quake in the ocean was times more intense than the one in the city. (Round to 3 decimal places.)arrow_forward
- HW-1 Q.4 Calculate the temperature, hydrostatic pressure, lithostatic pressure, and the effective pressure for the following conditions; Surface temperature%=D 60 °F Temperature gradient=1.45 °F/100 ft Depth of the layer =8,000 ft Specific gravity of the rock=D2.6arrow_forwardThe majority of the research shows that tectonic plates move at the average rate of between approximately 0.60 cm/yr to 10 cm/yr. (a) What distance does it move in 1 s at this speed range? (b) What is its speed in kilometers per million years?arrow_forwardEarth'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.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
AstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStax
An Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage Learning
Foundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning
Astronomy
Physics
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:OpenStax
An Introduction to Physical Science
Physics
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:Cengage Learning
Foundations of Astronomy (MindTap Course List)
Physics
ISBN:9781337399920
Author:Michael A. Seeds, Dana Backman
Publisher:Cengage Learning
Kepler's Three Laws Explained; Author: PhysicsHigh;https://www.youtube.com/watch?v=kyR6EO_RMKE;License: Standard YouTube License, CC-BY