(a) How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10 − 23 kg/m 3 .

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Answer 1

Question

Chapter 28, Problem 42QAP

To determine

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

To determine

(b)

There are about 2.7 x 1025 molecules per cubic meter in the air around you and a total of about 10¹⁹ grains of sands on all the beaches on earth. Relatively speaking, which is more likely: finding a dark matter particle in the air around you, or finding one particular grain of sand somewhere on one of Earth's beaches?

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Solve the linear system of equations attached using Gaussian elimination (not Gauss-Jordan) and back subsitution. Remember that: A matrix is in row echelon form if Any row that consists only of zeros is at the bottom of the matrix. The first non-zero entry in each other row is 1. This entry is called aleading 1. The leading 1 of each row, after the first row, lies to the right of the leading 1 of the previous row.

Answer 2

Question

Chapter 28, Problem 42QAP

To determine

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

To determine

(b)

There are about 2.7 x 1025 molecules per cubic meter in the air around you and a total of about 10¹⁹ grains of sands on all the beaches on earth. Relatively speaking, which is more likely: finding a dark matter particle in the air around you, or finding one particular grain of sand somewhere on one of Earth's beaches?

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Check out a sample textbook solution

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Answer 3

Question

Chapter 28, Problem 42QAP

To determine

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

To determine

(b)

There are about 2.7 x 1025 molecules per cubic meter in the air around you and a total of about 10¹⁹ grains of sands on all the beaches on earth. Relatively speaking, which is more likely: finding a dark matter particle in the air around you, or finding one particular grain of sand somewhere on one of Earth's beaches?

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Answer 4

Question

Chapter 28, Problem 42QAP

To determine

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

To determine

(b)

There are about 2.7 x 1025 molecules per cubic meter in the air around you and a total of about 10¹⁹ grains of sands on all the beaches on earth. Relatively speaking, which is more likely: finding a dark matter particle in the air around you, or finding one particular grain of sand somewhere on one of Earth's beaches?

Expert Solution & Answer

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Answer 5

Chapter 28, Problem 42QAP

To determine

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

To determine

(b)

There are about 2.7 x 1025 molecules per cubic meter in the air around you and a total of about 10¹⁹ grains of sands on all the beaches on earth. Relatively speaking, which is more likely: finding a dark matter particle in the air around you, or finding one particular grain of sand somewhere on one of Earth's beaches?

Answer 6

Chapter 28, Problem 42QAP

To determine

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

Answer 7

Chapter 28, Problem 42QAP

To determine

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

Answer 8

To determine

(b)

There are about 2.7 x 1025 molecules per cubic meter in the air around you and a total of about 10¹⁹ grains of sands on all the beaches on earth. Relatively speaking, which is more likely: finding a dark matter particle in the air around you, or finding one particular grain of sand somewhere on one of Earth's beaches?

Answer 9

To determine

(b)

There are about 2.7 x 1025 molecules per cubic meter in the air around you and a total of about 10¹⁹ grains of sands on all the beaches on earth. Relatively speaking, which is more likely: finding a dark matter particle in the air around you, or finding one particular grain of sand somewhere on one of Earth's beaches?

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 28 - Prob. 1QAP Ch. 28 - Prob. 2QAP Ch. 28 - Prob. 3QAP Ch. 28 - Prob. 4QAP Ch. 28 - Prob. 5QAP Ch. 28 - Prob. 6QAP Ch. 28 - Prob. 7QAP Ch. 28 - Prob. 8QAP Ch. 28 - Prob. 9QAP Ch. 28 - Prob. 10QAP

(a) How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10 − 23 kg/m 3 .

Solution Summary: The author calculates how many dark matter particles are there in one cubic meter.

Concept explainers

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

Want to see the full answer?

Chapter 28 Solutions

(a) How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10 − 23 kg/m 3 .

Solution Summary: The author calculates how many dark matter particles are there in one cubic meter.

Concept explainers

(a) How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.

Want to see the full answer?

Chapter 28 Solutions

(a)

How many dark matter particles are there in one cubic meter, if the average density of dark matter in our Milky Way galaxy is thought to be about 5 x 10−23kg/m3.