Homework Help is Here – Start Your Trial Now!
Science
Earth Science
Around 66 million years ago, a massive asteroid impact was believed to wipe out all dinosaurs on Earth. Millions of microscopic organisms were killed off. Invertebrates vanished from land and sea. Scientists believe that the dust particles suspended by the impact floated in the sky for a very long time, severely influencing the temperature and photosynthesis on Earth. Use your knowledge of gravitational settling to estimate how long it takes for the particles to settle down. Assume dust particles were suspended evenly in Earth's troposphere, which has an average height of 5 km Assume all of the particles have the same size of 1 um Assume the Cunningham correction factor is 1, and particle settling was in the Stokes regime (Re < 1) a) Assume there is no mixing in Earth's troposphere. How many years does it take so that 95% of the particles settle on the ground? b) Assume Earth's troposphere is well-mixed. How many years does it take so that 95% of the particles settle on the ground?

Around 66 million years ago, a massive asteroid impact was believed to wipe out all dinosaurs on Earth. Millions of microscopic organisms were killed off. Invertebrates vanished from land and sea. Scientists believe that the dust particles suspended by the impact floated in the sky for a very long time, severely influencing the temperature and photosynthesis on Earth. Use your knowledge of gravitational settling to estimate how long it takes for the particles to settle down. Assume dust particles were suspended evenly in Earth's troposphere, which has an average height of 5 km Assume all of the particles have the same size of 1 um Assume the Cunningham correction factor is 1, and particle settling was in the Stokes regime (Re < 1) a) Assume there is no mixing in Earth's troposphere. How many years does it take so that 95% of the particles settle on the ground? b) Assume Earth's troposphere is well-mixed. How many years does it take so that 95% of the particles settle on the ground?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
See similar textbooks
icon
Related questions
Question
Around 66 million years ago, a massive asteroid impact was believed to wipe out all dinosaurs on Earth. Millions of microscopic organisms were killed off. Invertebrates vanished from land and sea. Scientists believe that the dust particles suspended by the impact floated in the sky for a very long time, severely influencing the temperature and photosynthesis on Earth. Use your knowledge of gravitational settling to estimate how long it takes for the particles to settle down. Assume dust particles were suspended evenly in Earth's troposphere, which has an average height of 5 km Assume all of the particles have the same size of I um Assume the Cunningham correction factor is 1, and particle settling was in the Stokes regime (Re< 1) a) Assume there is no mixing in Earth's troposphere. How many years does it take so that 95% of the particles settle on the ground? b) Assume Earth's troposphere is well-mixed. How many years does it take so that 95% of the particles settle on the ground?
Transcribed Image Text:Around 66 million years ago, a massive asteroid impact was believed to wipe out all dinosaurs on Earth. Millions of microscopic organisms were killed off. Invertebrates vanished from land and sea. Scientists believe that the dust particles suspended by the impact floated in the sky for a very long time, severely influencing the temperature and photosynthesis on Earth. Use your knowledge of gravitational settling to estimate how long it takes for the particles to settle down. Assume dust particles were suspended evenly in Earth's troposphere, which has an average height of 5 km Assume all of the particles have the same size of I um Assume the Cunningham correction factor is 1, and particle settling was in the Stokes regime (Re< 1) a) Assume there is no mixing in Earth's troposphere. How many years does it take so that 95% of the particles settle on the ground? b) Assume Earth's troposphere is well-mixed. How many years does it take so that 95% of the particles settle on the ground?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Applications and Investigations in Earth Science …
Applications and Investigations in Earth Science …
Earth Science
ISBN:
9780134746241
Author:
Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:
PEARSON
Exercises for Weather & Climate (9th Edition)
Exercises for Weather & Climate (9th Edition)
Earth Science
ISBN:
9780134041360
Author:
Greg Carbone
Publisher:
PEARSON
Environmental Science
Environmental Science
Earth Science
ISBN:
9781260153125
Author:
William P Cunningham Prof., Mary Ann Cunningham Professor
Publisher:
McGraw-Hill Education
Earth Science (15th Edition)
Earth Science (15th Edition)
Earth Science
ISBN:
9780134543536
Author:
Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:
PEARSON
Environmental Science (MindTap Course List)
Environmental Science (MindTap Course List)
Earth Science
ISBN:
9781337569613
Author:
G. Tyler Miller, Scott Spoolman
Publisher:
Cengage Learning
Physical Geology
Physical Geology
Earth Science
ISBN:
9781259916823
Author:
Plummer, Charles C., CARLSON, Diane H., Hammersley, Lisa
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS