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Rubidium-Strontium dating decay and becomes A geologist finds an old rock and wants to determine its...
11. My Notes Ask Your Teacher -/10 points Content Carbon dating An archaeologist finds some ancient...
11. My Notes Ask Your Teacher -/10 points Content Carbon dating An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 435 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 11 decays/s. Determine the age of the bone (and presumably the jewelry). Remember, the ratio of 14C to 12C when the animal died was...
Suppose a scientist finds a rock with an interesting fossil. Curious to know the age of...
Suppose a scientist finds a rock with an interesting fossil. Curious to know the age of the fossil, she takes the rock to a lab. The lab determines the amount of rubidium (Rb) and strontium (Sr) in the rock. The scientist is familiar with radiometric dating and knows that she can now calculate the age of the rock, t, using an isochron. The Rb-Sr isochron equation is STSIO + 365It 87 SIt -=86510 86 Srt - 87 Rbt colt _...
WILL RATE CORRECT ANSWERS CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life...
WILL RATE CORRECT ANSWERS
CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the age of a rock sample that contains 109.4 ug 87Rb and 5.5 87Sr? ug years old Assume that no 87 Sr was present when the rock was formed. The atomic masses are given in the table below: Nuclide Atomic Mass 87 RB 86.90919 87$ 86.90888
The technique known as potassium-argon dating is used to date old lava flows. The potassium isotope,...
The technique known as potassium-argon dating is used to date old lava flows. The potassium isotope, ^40K has a 1.28 billion year half-life and is naturally present at very low levels. ^40K decays by beta emission into ^40Ar. Argon is a gas, and there is no argon in flowing lava because the gas escapes. Once the lava solidifies, any argon produced in the decay of ^40K is trapped inside and cannot escape. A geologist brings you a piece of solidified...
21.42 for the beta decay of 130TI? OBJECTIVE Determine the ages of samples of matte from...
21.42
for the beta decay of 130TI? OBJECTIVE Determine the ages of samples of matte from radioactive decay data. 21.41 A sample of uranium ore contains 6.73 mg 238U and 3.22 ,206Pb. Assuming that all of the 206Pb arose from decay mg of the 238U and that the half-life of 23U is 4.51 × 10° years, determine the of the ore. age 21.42 A tree was cut down and used to make a statue 2300 vears ago. What fraction of...
ReviewI Constants The technique known as potassium-argon dating is used to date volcanic rock and ash, and thus establish dates for nearby fossils like this hominid skull.(Figure 1) The potassi...
ReviewI Constants The technique known as potassium-argon dating is used to date volcanic rock and ash, and thus establish dates for nearby fossils like this hominid skull.(Figure 1) The potassium isotope "0K has a 1.28-billion-year half-life and is naturally present at very low levels. Its most common decay mode is beta-minus decay into the stable isotope 40 Ca, but 10.9% of its decays are beta-plus which result in the creation of the stable isotope 40 Ar. The high temperatures in...
Because of its inability to control film and personnel costs in its radiology department, Sanger General...
Because of its inability to control film and personnel
costs in its radiology department, Sanger General Hospital wants to
replace its existing picture archive and communication (PAC) system
with a newer version. The existing system, which has a current book
value of $2,250,000, was purchased three years ago for $3,600,000
and is being depreciated on a straight-line basis over an
eight-year life to a salvage value of $0. This system could be sold
for $800,000 today. The new PAC system...
11. My Notes Ask Your Teacher -/10 points Content Carbon dating An archaeologist finds some ancient jewelry made from bone. The jewelry has a carbon mass of 435 g (HINT: Assume all the carbon is 12C and determine the number of atoms) and careful measurements show that the remaining 14C has a current decay rate of 11 decays/s. Determine the age of the bone (and presumably the jewelry). Remember, the ratio of 14C to 12C when the animal died was...
Suppose a scientist finds a rock with an interesting fossil. Curious to know the age of the fossil, she takes the rock to a lab. The lab determines the amount of rubidium (Rb) and strontium (Sr) in the rock. The scientist is familiar with radiometric dating and knows that she can now calculate the age of the rock, t, using an isochron. The Rb-Sr isochron equation is STSIO + 365It 87 SIt -=86510 86 Srt - 87 Rbt colt _...
WILL RATE CORRECT ANSWERS
CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the age of a rock sample that contains 109.4 ug 87Rb and 5.5 87Sr? ug years old Assume that no 87 Sr was present when the rock was formed. The atomic masses are given in the table below: Nuclide Atomic Mass 87 RB 86.90919 87$ 86.90888
The technique known as potassium-argon dating is used to date old lava flows. The potassium isotope, ^40K has a 1.28 billion year half-life and is naturally present at very low levels. ^40K decays by beta emission into ^40Ar. Argon is a gas, and there is no argon in flowing lava because the gas escapes. Once the lava solidifies, any argon produced in the decay of ^40K is trapped inside and cannot escape. A geologist brings you a piece of solidified...
21.42
for the beta decay of 130TI? OBJECTIVE Determine the ages of samples of matte from radioactive decay data. 21.41 A sample of uranium ore contains 6.73 mg 238U and 3.22 ,206Pb. Assuming that all of the 206Pb arose from decay mg of the 238U and that the half-life of 23U is 4.51 × 10° years, determine the of the ore. age 21.42 A tree was cut down and used to make a statue 2300 vears ago. What fraction of...
ReviewI Constants The technique known as potassium-argon dating is used to date volcanic rock and ash, and thus establish dates for nearby fossils like this hominid skull.(Figure 1) The potassium isotope "0K has a 1.28-billion-year half-life and is naturally present at very low levels. Its most common decay mode is beta-minus decay into the stable isotope 40 Ca, but 10.9% of its decays are beta-plus which result in the creation of the stable isotope 40 Ar. The high temperatures in...
Because of its inability to control film and personnel
costs in its radiology department, Sanger General Hospital wants to
replace its existing picture archive and communication (PAC) system
with a newer version. The existing system, which has a current book
value of $2,250,000, was purchased three years ago for $3,600,000
and is being depreciated on a straight-line basis over an
eight-year life to a salvage value of $0. This system could be sold
for $800,000 today. The new PAC system...
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