Biology, 28.07.2019 14:10 whitakers87
Ameteorite is determined to be 4.5 billion years old. it now has 78 atoms of lead-206. assuming no loss of daughter isotopes, how many atoms of uranium-238 did the meteorite have to begin with? the half-life of uranium-238 is 4.5 billion years. a) 156 b) 312 c) 78 d) 238
Answers: 1
Biology, 22.06.2019 02:00
1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area
Answers: 2
Biology, 22.06.2019 08:50
If the nucleus of a cell was removed the cell wouldn’t be able to make proteins because
Answers: 1
Ameteorite is determined to be 4.5 billion years old. it now has 78 atoms of lead-206. assuming no l...
Mathematics, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Chemistry, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Health, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10
Mathematics, 19.09.2021 22:10