Chemistry, 04.05.2021 01:00 dhcuajbfrhcyx
You are an archaeologist who uncovers a new site of early
human activity. Currently, there is evidence of humans living in
this area from 8000 to 22,500 years ago. A few bones are found
at the site including a human skull. A current skull contains a
carbon-14 count of 10,000. The fossil skull contains a carbon-14
count of 312.5. How does your find affect knowledge of early
humans?
A. This find shows that humans arrived there 28,500 years earlier than
previously thought.
B. This find is consist
ent with what we already knew.
C. This find shows that humans arrived there are 6000 years earlier than previously thought.
D. The fossil is too old to accurately use carbon dating on.
Answers: 1
Chemistry, 21.06.2019 18:00
Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.
Answers: 3
Chemistry, 21.06.2019 22:30
Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial
Answers: 1
Chemistry, 22.06.2019 01:30
Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%
Answers: 3
You are an archaeologist who uncovers a new site of early
human activity. Currently, there is evid...
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