A bone is found at an archaeological site and is placed into a mass spectrometer. It is found that there are 350 14C atoms for every 1
ratio of 14 C to 12C is
350 / 1*10^ 15 = 35*10^ -13
normal ration of 14 C to 12C is 1.2*10^-12.
The age of rock is
1.2*10^-12 / 35*10^-13 = e ^ -t/ T_1/2
0.34 = e ^ - t / 5730 y
t = 5730 Y
A bone is found at an archaeological site and is placed into a mass spectrometer. It...
Mass of carbon in animal bone fragment found in an archeological site is 198g. If the bone registers an activity of 16 decays/s from radioactive 14C. What is its age?. Assume that the animal when it died that the ratio of 14C to 12C was 1.3x10-12. The half-life of 14C is 5730years.
An artifact classified as bone, horse, found in a site at Offham, England, is found to have a 14C radioactivity of 0.192 counts per second per gram of carbon. If living carbon-containing objects have an activity of 0.255 counts per second per gram of carbon, estimate the age of the artifact? The half-life of 14C is 5730 years. у
A piece of charcoal (essentially 100% carbon) from an archaeological site in Egypt is subjected to radiocarbon dating. The sample has a mass of 3.82 g and a 14C activity of 0.64 Bq. The initial activity is 0.25 Bq per gram of carbon. Calculate the age of the charcoal sample. ^please help me to calculate the half life please help me to calculate the half life
At an archaeological dig, the remains of a saber-tooth tiger are found. In a carbon dating ( 14C has a half-life of 5730 years) test to calculate the age of the cat, a scientist finds that the amount of 14C is about 1/32 the amount of 14C in living animals. How long ago did this saber-tooth tiger die?
An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 303 g (HINT: Assume all the carbon is 12C and determine the number of atoms) and careful measurements show that the remaining 14C has a current decay rate of 14 decays/s. Determine the age of the bone (and presumably the jewelry). Remember, the ratio of 14C to 12C when the animal died was 1.3×10-12 & the half-life of 14C is 5730 y. age of...
A 2.10-g sample of wood from an archaeological site gave 8600 disintegrations of 14C in a 10-hour measurement. In the same time, a 2.10-g modern sample gave 19000 disintegrations. Calculate the age of the wood. The half-life of carbon-14 is 5730 years.
Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at an archaeological site. At one excavation, a sample of 19 potsherds indicated that were of the three-circle, red-on-white pattern (a) Find a point estimate p for the proportion of all ceramic potsherds at this site that are of the three-cinder, red-on-white pattern. (Round your answer to four decimal places (b) Compute a 95% confidence interval for the population proportion p of all ceramic potsherds with this...
An Iron-Nickel sample from a meteorite was placed into a
velocity selector and mass spectrometer. Experimenters expect 3
primary isotopes: 56Fe, 58Ni, & 60Ni. Positive ions are
accelerated by an applied potential (ΔV) of 3300 Volts which is the
same potential difference used to create the electric field in the
velocity selector, where d is 1.1 cm.
Need 3 and 4.
An Iron-Nickel sample from a meteorite was placed into a velocity selector and mass spectrometer. Experimenters expect 3 primary...
The types of raw materials used to construct stone tools found
at an archaeological site are shown below. A random sample of 1486
stone tools were obtained from a current excavation site. Raw
Material Regional Percent of Stone Tools Observed Number of Tools
as Current excavation Site Basalt 61.3% 906 Obsidian 10.6% 160
Welded Tuff 11.4% 160 Pedernal chert 13.1% 205 Other 3.6% 55 Use a
1% level of significance to test the claim that the regional
distribution of raw...
AV An Iron-Nickel sample from a meteorite was placed into a velocity selector and mass spectrometer. Experimenters expect 3 primary isotopes: 56Fe, 58Ni, & boni. Positive ions are accelerated by an applied potential (AV) of 3300 Volts which is the same potential difference used to create the electric field in the velocity selector, where d is 1.1 cm. 1. On the figure provided, in the velocity selector region, (A) draw the direction of the electric field. (B) Draw the necessary...