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What is a half-value layer?
Some previously called a half-value thickness or half-value layer a half-thickness. Whatever an investigator calls it, the half-value layer is the thickness a layer of a given material would have to be to reduce the intensity of radiation striking its surface by half (50%).
What era did earth contain a layer of iridium?
In the K-T layer between the Cretaceous and Tertiary eras.
Why do Scientists think a Asteroid hit the world 65 million years killed the dinos?
The main evidence is a layer of iridium that is found worldwide. Iridium is an element that is rare on Earth's surface, but is common in asteroids. The iridium layer dates to 65.5 million years ago, and coincides with the extinction of the dinosaurs. Also, geologists have discovered the Chixculub crater, a crater that is buried by sediment but is so large it could only have been created by an asteroid 6 miles across.
How many moles of iridium are in 26.4g of iridium?
26,4 g iridium is equal to 0,137 mol.
Is iridium a inorganic element?
Iridium is a chemical element.
What is a half-value layer?
Some previously called a half-value thickness or half-value layer a half-thickness. Whatever an investigator calls it, the half-value layer is the thickness a layer of a given material would have to be to reduce the intensity of radiation striking its surface by half (50%).
What is the Half value layer relationship to kvp?
kVp is the penetrating ability of an x-ray and half value layer is the amount of filtration or thickness of an object needed to reduce the intensity of the x-ray by half. So if you decreased kVp, then the half value layer would decrease.
What is meant by the half value layer of a heterogenous beam?
The half value layer of a heterogenous beam is the thickness of the absorber that reduces the exposure rate to half the initial (starting) exposure.
What is meant by the half value layer of a homogenous beam?
The half value layer of a homogenous beam is the thickness of the absorber that reduces the intensity of the beam to half the initial (starting) intensity.
What is the rare element found in the tombstone layer of the earth?
iridium
What era did earth contain a layer of iridium?
In the K-T layer between the Cretaceous and Tertiary eras.
Where is energy stored in glucose?
The energy is stored within the layer of iridium in the lower hemisphere of Antarctica. Oops i mean the lower hemisphere of the anaredia layer of glucose.
What is the half value layer for cobalt-60?
I would not use Co-60 for shielding. Did you mean, "What is the half value layer for some shielding (XXXXXXXX) using Co-60 as a source of gamma ray energy?
What era had a layer of iridium deposited all over Earth?
End of the Mesozoic era
What element has 3 i's in its name?
Iridium, Einsteinium
Why do Scientists think a Asteroid hit the world 65 million years killed the dinos?
The main evidence is a layer of iridium that is found worldwide. Iridium is an element that is rare on Earth's surface, but is common in asteroids. The iridium layer dates to 65.5 million years ago, and coincides with the extinction of the dinosaurs. Also, geologists have discovered the Chixculub crater, a crater that is buried by sediment but is so large it could only have been created by an asteroid 6 miles across.
Why is the extinction of the dinosaurs attributed to an asteroid impact?
The original observation was that in the fossil records there is a layer with high levels of iridium and osmium at the time of dinosaur extinction. Iridium and osmium are common is asteroids. For the layer to be all over the globe it must have been a major strike which would have caused global wide climate change causing a mass extinction.
