Geography, 26.03.2020 05:58 karinalovez
In an unweathered sample of detrital sedimentary rock, the ratio of an unstable isotope to its stable daughter isotope is 1/15. If no daughters were present at the time the rock cooled below closure temperature, and the half-life of the reaction is 50 million years, how old is the rock?
a. 200 million years
b. 400 million years
c. 750 million years
d. None of the above are correct
Answers: 3
Geography, 23.06.2019 05:20
Advantages and disadvantages of mitigation and adaptation
Answers: 1
Geography, 23.06.2019 08:00
Which part of a mountain receives the majority of moisture due to the rain shadow effect? a. the leeward side b. the windward side c. the bottom of the mountain d. all parts of the mountain receive equal amounts of moisture.
Answers: 1
Geography, 23.06.2019 20:40
East asia is considered a less developed nation. true or false
Answers: 1
Geography, 25.06.2019 03:30
Which affects the climate of the caribbean island most? a. sea and elevation b. sea and wind c. volcanoes d. elevation
Answers: 1
In an unweathered sample of detrital sedimentary rock, the ratio of an unstable isotope to its stabl...
Mathematics, 01.02.2021 02:50
English, 01.02.2021 02:50
Social Studies, 01.02.2021 02:50
History, 01.02.2021 02:50
Advanced Placement (AP), 01.02.2021 02:50
Spanish, 01.02.2021 02:50
Biology, 01.02.2021 02:50
Mathematics, 01.02.2021 02:50
Computers and Technology, 01.02.2021 02:50
Social Studies, 01.02.2021 02:50
Mathematics, 01.02.2021 02:50
Mathematics, 01.02.2021 02:50
Mathematics, 01.02.2021 02:50
Mathematics, 01.02.2021 02:50