Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use which radioisotope? uranium-238 rubidium-91 iodine-131 cobalt-60

the only one of these materials that allows studying processes of a very long period of time is Uranium 238

Explanation:

In a radioactive material, half of the atoms decay each life period, in carbon 14 this period T = 5730 years, so for a time of 40,000 years there are 7 life periods, so there are very few atoms left without decomposing .

To study older samples, materials with a longer life period are needed, let's show the visa time

²³⁸U     T=  4.5 10¹⁰ years

⁹¹Rb     T =  58 s

¹³¹I        T= 8.04 days

⁶⁰Co     T= 5.27 years

Therefore, the only one of these materials that allows studying processes of a very long period of time is Uranium 238

what type of charge does it have? negative

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.