Geography, 31.07.2019 18:10, Queenjlife2583
Ageologist finds an old rock and wants to determine its age using rubidium-strontium dating. this is possible because 87rb, which has a half-life of 4.75×1010 y, undergoes β − decay and becomes 87sr. the geologist determines that the ratio of 87sr to 87rb is 0.075. assuming there was no 87sr in the rock when it was formed, determine the age of the rock. age of rock = (no response)
Answers: 3
Geography, 22.06.2019 06:30, adriandehoyos1p3hpwc
Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide
Answers: 3
Geography, 22.06.2019 10:30, pinkkitty00012
The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above
Answers: 1
Geography, 23.06.2019 05:00, pino40
Which statements describe characteristics of mdcs? higher standard of living increased agricultural focus more access to health care more access to transportation and communication more industry reduced educational opportunities shorter life expectancy
Answers: 2
Ageologist finds an old rock and wants to determine its age using rubidium-strontium dating. this is...
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