heytorfrancisco007 heytorfrancisco007

21-09-2021
Biology

contestada

4. A scientist finds a rock with old microfossils in it, likely from around 4 billion years ago. Which
radioactive isotope should the scientist use to determine the age of the sample and why? (
se fosse uma pedra com 4 bilhoes de anos qual isotopo deveria de usar e porque?)

Respuesta :

hillqryc hillqryc

21-09-2021

Answer:

U-238

Explanation:

the half-life of uranium-238 is about 4.5 billion years

Answer Link

Otras preguntas

given g (c)=9 (c )^2+7=?

Which statement BEST describes the Bolshevik Revolution? A) It was begun by Joseph Stalin. B) It began a civil war in Russia. C) It toppled Tsar Nicholas II

Find in the text synonyms for the words: at present – different – to contain – schooling – kids – big – film fans – devote – theme – definite – passionate – mov

Cindy earns $10.50 per hour working at a restaurant. On Friday, she spent 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and 1 5/12 hours serving customers.

Anna’s mother passed away three years ago, so she was unavailable for genetic testing. based upon anna’s family pedigree that you created in the previous activi

Religion income marital status and education are considered to be which of the following

Mike drank more than half the juice in his glass. What fraction of the juice could Mike have drunk?

The world record for pole vaulting is 6.15 m. If the pole vaulter's gravitational potential energy is 4942 J, what is his mass? g 9.8 m/s2

Which best describes sensory and motor neurons? A. Sensory neurons process information from stimuli receivers; motor neurons process information from muscles or

The world record for pole vaulting is 6.15 m. If the pole vaulter's gravitational potential energy is 4942 J, what is his mass? g 9.8 m/s2