Physics, 23.11.2020 21:20 krystinayagel013
Carbon-14 has a half-life of 5,730 years. If scientists discover a mummified Cro-Magnon specimen, they will first want to determine its age. When examining a sample from the bone remains, the scientists discover the specimen is composed of 12.5% carbon-14 and 87.5% nitrogen-14. How old is this mummy?
A. 5730 yrs old
B. 22920 yrs old
C. 11460 yrs old
D. 17190 yrs old
Answers: 3
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Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.
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What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th
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Carbon-14 has a half-life of 5,730 years. If scientists discover a mummified Cro-Magnon specimen, th...
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