Let's say that element X has a half-life of 7.5 million years before it becomes the...
Let's say that element X has a half-life of 7.5 million years before it becomes the daughter product, element Y. You find a rock that has 32 atoms of element Y for every atom of element X. How old is the rock?
You must provide a numerical number( If your answer was 7 million years, then you would write 7 for your answer.)
What is the "runaway greenhouse effect"?
Why is it called "runaway"?
Why is the runaway greenhouse effect relevant today?
Homework Answers
Runaway greenhouse effect is a situation where the strength of the greenhouse gases increases by positive feedback between the surface temperature and atmospheric opacity in such a way that the ocean boils away. In this situation, the greenhouses become stronger until all the greenhouse gases are in the atmosphere.
It is called a runaway as it is formed by a positive feedback loop where the situation amplifies by its own effect.
the runaway greenhouse effect is quite relevant today as it is the mother of all environmental disater and the earth has been witnessing the extreme events in the past few years and the situation is worsening by the years.
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Let's say that element X has a half-life of 7.5 million years
before it becomes the...
Rocks W & X are dated using an element with a half-life of 20 million years....
Rocks W & X are dated using an element with a half-life of 20 million years. Answer the following questions using the data obtained from these two rocks. Rock W – Parent = 6.25% (1/16), Daughter = 93.75% (15/16) Rock X – Parent = 25% (¼), Daughter = 75% (¾) Calculate the age for each igneous rock. (Show your calculations.) what would be a possible age for rock layer Z?
7. If the power or a nens is An isotope has a half-life of 2 years....
7. If the power or a nens is An isotope has a half-life of 2 years. If there are 600 molecules of this isotope how long before there is less than 50 (answer in years)? 8. An object becomes positively charged if it has an excess of toa). Electrons 9. b). Protons ad c). Neutrons 10. How many neutrons are in the element Zn75?
7. anium-238 is an alpha-emitter with a half-life of 4.522 x 10 years and an isotope...
7. anium-238 is an alpha-emitter with a half-life of 4.522 x 10 years and an isotope mass of 238.0508 g/mol. This isotope is useful for dating geological samples. A rock from the ocean floor contains 0.4203 g Uranium-238. What is the activity of this rock (from 238U) in counts per minute? Show all of your work. 8. Scientists exploring the new element Covidium (Cv) discover it has various isotopes. Calculate the binding energy per nucleon in units of kJ for...
Chapter 2 Fundamental Concepts 77 c. Your rock contains Iparent isotope A and daughter isotope B....
Chapter 2 Fundamental Concepts 77 c. Your rock contains Iparent isotope A and daughter isotope B. Geochron Laborato- ries dates the rock specimen at 500 million vears old. What is the hall-life of isotope A? d. Your rock contains a parent isotope Sand daughter isotope 7. Geochron Laboratories dates the rock specimen at 200 million vears old.'What is the half-life of isotope S? Geochron has also told you that one of its lab technicians split the rock in half and...
Please answer all bout half way up, you down 350 million years ago. Shortly backbon ind...
Please answer all
bout half way up, you down 350 million years ago. Shortly backbon ind upon closer isho tereafter, you notice something sticks laid the rock and upon closer inspection, it is clear you are 1. Lets say you are hiking up the side Pss a sign that tells you that the rock layer boundary you are looking at the fossil of the to ak bone of some kind of extinct animal. Given its age, this ba a) fish...
PLEASE ATTACH EXCEL FILE!!! Scenario for Homework #1 . Let's say that a company has purchased...
PLEASE ATTACH EXCEL FILE!!!
Scenario for Homework #1 . Let's say that a company has purchased a plot of land (approximately 15 acres) in an affluent suburb. They must now decide what to build on that land. The three options they are considering are listed in the table below along with the forecasted cash flows for each option. Complete the decision matrix on the next slide to determine which would be the best option (choose only one). Write a sentence...
Imagine you work for a real estate developer. Three years ago, the developer spent $50 million on a plot of land, which is now valued at $60 million. However, the building project has been held up in...
Imagine you work for a real estate developer. Three years ago,
the developer spent $50 million on a plot of land, which is now
valued at $60 million. However, the building project has been held
up in red tape until now, and the company has paid $3 million in
interest on its initial loans. Three years ago they thought they
could build 100 condos for a total of $30 million and sell them for
a total of $100 million. Now,...
3.2 Periodic trends 1. (0620-5 2012-Paper 1/2-Q21) Which properties of the element titanium, Ti, can be...
3.2 Periodic trends 1. (0620-5 2012-Paper 1/2-Q21) Which properties of the element titanium, Ti, can be predicted from its position in the Periodic Table? forms coloured compounds conducts electricity when solid can be used has low density as a catalyst X A X X Xx 2. (0620-W 2012-Paper 1/1-Q20) The diagram shows an outline of the Periodic Table. U V W X Y Which of the elements U, V, W, X and Y would react together in the ratio of...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
Would like to get help with this homework, and I will be so thankful if you solve all the questions and if that's a...
Would like to get help with this homework, and I will be so
thankful if you solve all the questions and if that's a lot start
from number 4, please. It is hard this why I am asking for your
help if you answer all my questions I will give you a good rating
and feedback. Thank you so much for your help.
Atomic Orbitals, Bonds and Dispersion Forces pictures of atomic orbitals such as those above. The color sign...
7. If the power or a nens is An isotope has a half-life of 2 years. If there are 600 molecules of this isotope how long before there is less than 50 (answer in years)? 8. An object becomes positively charged if it has an excess of toa). Electrons 9. b). Protons ad c). Neutrons 10. How many neutrons are in the element Zn75?
7. anium-238 is an alpha-emitter with a half-life of 4.522 x 10 years and an isotope mass of 238.0508 g/mol. This isotope is useful for dating geological samples. A rock from the ocean floor contains 0.4203 g Uranium-238. What is the activity of this rock (from 238U) in counts per minute? Show all of your work. 8. Scientists exploring the new element Covidium (Cv) discover it has various isotopes. Calculate the binding energy per nucleon in units of kJ for...
Chapter 2 Fundamental Concepts 77 c. Your rock contains Iparent isotope A and daughter isotope B. Geochron Laborato- ries dates the rock specimen at 500 million vears old. What is the hall-life of isotope A? d. Your rock contains a parent isotope Sand daughter isotope 7. Geochron Laboratories dates the rock specimen at 200 million vears old.'What is the half-life of isotope S? Geochron has also told you that one of its lab technicians split the rock in half and...
Please answer all
bout half way up, you down 350 million years ago. Shortly backbon ind upon closer isho tereafter, you notice something sticks laid the rock and upon closer inspection, it is clear you are 1. Lets say you are hiking up the side Pss a sign that tells you that the rock layer boundary you are looking at the fossil of the to ak bone of some kind of extinct animal. Given its age, this ba a) fish...
PLEASE ATTACH EXCEL FILE!!!
Scenario for Homework #1 . Let's say that a company has purchased a plot of land (approximately 15 acres) in an affluent suburb. They must now decide what to build on that land. The three options they are considering are listed in the table below along with the forecasted cash flows for each option. Complete the decision matrix on the next slide to determine which would be the best option (choose only one). Write a sentence...
Imagine you work for a real estate developer. Three years ago,
the developer spent $50 million on a plot of land, which is now
valued at $60 million. However, the building project has been held
up in red tape until now, and the company has paid $3 million in
interest on its initial loans. Three years ago they thought they
could build 100 condos for a total of $30 million and sell them for
a total of $100 million. Now,...
3.2 Periodic trends 1. (0620-5 2012-Paper 1/2-Q21) Which properties of the element titanium, Ti, can be predicted from its position in the Periodic Table? forms coloured compounds conducts electricity when solid can be used has low density as a catalyst X A X X Xx 2. (0620-W 2012-Paper 1/1-Q20) The diagram shows an outline of the Periodic Table. U V W X Y Which of the elements U, V, W, X and Y would react together in the ratio of...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
Would like to get help with this homework, and I will be so
thankful if you solve all the questions and if that's a lot start
from number 4, please. It is hard this why I am asking for your
help if you answer all my questions I will give you a good rating
and feedback. Thank you so much for your help.
Atomic Orbitals, Bonds and Dispersion Forces pictures of atomic orbitals such as those above. The color sign...
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