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If the age of the Earth is 4.5 billion years and the half-life of 40K is 1.26 billion years what percent of the Earth's original amount of 40K remains today?
Wiki User
∙ 11y ago
8.4
Wiki User
∙ 11y ago
Approximately 25% of the Earth's original amount of 40K remains today, given that one half-life of 40K is 1.26 billion years. This means that half of the original amount decayed in 1.26 billion years, leaving behind the remaining 50%, which is now further decaying to reach 25% after 4.5 billion years.
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What is the half life of uranium 238 if 85.719 percent of any given amount remains after 1 billion years?
The half-life of uranium-238 is approximately 4.47 billion years. If 85.719% of the original amount remains after 1 billion years, then the remaining 14.281% would have decayed in that time period.
Is it false that dinosaur footprints are original remains?
Yes, it is false that dinosaur footprints are original remains.
What retains its original state?
A diamond retains its original state as its chemical structure remains the same no matter the changes in its physical form.
Why are original remains seldom found?
Original remains are seldom found because natural decomposition processes break down organic materials over time. Factors like exposure to the elements, scavenging by animals, and microbial activity can quickly degrade organic remains, making them difficult to preserve. Additionally, environmental conditions such as soil composition and moisture levels can impact the likelihood of original remains being preserved.
What can rock fossils and original remains show about earths rock?
it can show a rocks age and what it has gone through
How old is a rock for which you determine that 55 percent of the original uranium-238 remains while the other 45 percent has decayed into lead?
The rock would be approximately 1.51 billion years old. This estimation is based on the known half-life of uranium-238, which is about 4.5 billion years. By determining that 55 percent of the original uranium-238 remains, you can infer the age of the rock by calculating how many half-lives have passed.
How many Percent does the original remains of the Philippine Forest have?
20 percent of the original remains of the Philippine forest
What is the half life of uranium 238 if 85.719 percent of any given amount remains after 1 billion years?
The half-life of uranium-238 is approximately 4.47 billion years. If 85.719% of the original amount remains after 1 billion years, then the remaining 14.281% would have decayed in that time period.
After one half-life what percent of the original uranium remains?
After one half-life, 50% (or half) of the original uranium remains.
A sample of radioactive isotope has a halflife of 1 day how much of the original sample will be left at the end of the fourth day?
If a sample of radioactive material has a half-life of one week the original sample will have 50 percent of the original left at the end of the second week. The third week would be 25 percent of the sample. The fourth week would be 12.5 percent of the original sample.
Is it false that dinosaur footprints are original remains?
Yes, it is false that dinosaur footprints are original remains.
What does 0 percent dilution mean?
0 percent dilution means that no additional solvent or liquid has been added to a solution. The solution remains in its original concentration without any dilution.
What is halflife about?
Half-life is the time it takes for one half of the radioactive material to decay. It is logarithmic, so after two half-lives, one quarter remains - then one eighth - etc.
How are the original remains of shells bones and teeth of animals and fish formed into fossils?
Mineralization occurs in the original remains, inside the shells bones and teeth, of animals and fish. This process turns remains into fossils.
What are the original remains of small insects preserved in?
amber
What is 35 percent off 150 dollars?
35% off $150.00 means that 65% remains. $150.00 * .65 = $97.50. Amount saved = Original Price - Sale Price = $150.00 - $97.50 = $52.50.
After three half-lives what fraction of a radioactive sample remains?
1/8 of the original amount remains.
