Biology, 24.06.2019 02:00 Gabyngreen
Rubidium-87 has a half-life of 48.1 billion years. after how many years is there 25 percent parent isotope and 75 percent daughter isotope contained in the object?
Answers: 1
Biology, 22.06.2019 02:30
Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.
Answers: 1
Biology, 22.06.2019 03:00
How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half
Answers: 2
Biology, 22.06.2019 06:30
What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.
Answers: 2
Biology, 22.06.2019 09:00
Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land
Answers: 3
Rubidium-87 has a half-life of 48.1 billion years. after how many years is there 25 percent parent i...
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