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What is 25 percent off 6.99?
To calculate 25 percent off $6.99, first find 25 percent of the amount by multiplying $6.99 by 0.25, which equals approximately $1.75. Then, subtract that discount from the original price: $6.99 - $1.75 = $5.24. Therefore, 25 percent off $6.99 is approximately $5.24.
What is 15 percent off 329?
To calculate 15 percent off 329, first find 15 percent of 329 by multiplying 329 by 0.15, which equals approximately 49.35. Subtract this amount from the original price: 329 - 49.35 = 279.65. Therefore, 15 percent off 329 is approximately 279.65.
Does the size of a radioactive sample affect half-life?
No, the size of a radioactive sample does not affect its half-life. The half-life is a characteristic property of a radioactive isotope, defined as the time it takes for half of the radioactive atoms in a sample to decay. This property is intrinsic to the isotope itself and remains constant regardless of the amount of material present. Thus, whether you have a small or large sample, the half-life will remain the same.
What is percent amount of oxigen in air?
The atmosphere is composed of approximately 21% oxygen by volume. The remaining components include nitrogen (about 78%) and trace gases, including carbon dioxide and argon. This percentage can vary slightly depending on altitude and environmental conditions, but it remains relatively constant at sea level.
What is 12.68 with a 15 percent tip?
To calculate a 15 percent tip on $12.68, you multiply 12.68 by 0.15, which equals approximately $1.90. Adding the tip to the original amount, the total comes to about $14.58.
After three half-lives what fraction of a radioactive sample remains?
1/8 of the original amount remains.
Does The amount of radioactive carbon in your body increases at the time of death?
The amount of radioactive carbon in the body is fixed at the time of death. After death, the carbon would the begin to decay.
When the amount of a radioactive substance is reduced by 50 percent what has occurred?
Half-Life APEX (; xoxo
After three half-lives what percent of the radioactive isotope is remaining?
After three half-lives, 12.5% of the radioactive isotope is remaining. This is because each half-life reduces the amount of radioactive material by half.
What kinetics does radioactive decay obey?
Radioactive decay follows first-order kinetics, meaning the rate of decay is proportional to the amount of radioactive material present. This means that half-life remains constant throughout the decay process.
Why After three half-lives what fraction of a radioactive sample remains?
After three half-lives, only 1/8 (or 12.5%) of the original radioactive sample remains. This is because each half-life reduces the amount of radioactive material by half, so after three half-lives, you would have (1/2) * (1/2) * (1/2) = 1/8 of the original sample remaining.
How much acetonitrile in 36 percent acetonitrile?
Approximately 0.36 of the total amount in the container.
What is the percentage of radioactive nuclei left after 3 half lives have passed?
12.5%
How much of a radioactive substance remains after 10 hours if its half life is 5 hours?
After 10 hours, 25% of the radioactive substance remains because each half-life reduces the amount by half. So, after the first 5 hours, 50% remains, and after the next 5 hours, half of that amount remains, which is 25%.
Why must radioactive decay must be constant in order for radioactive dating to be accurate?
Amount of certain radioactive isotope in an object is compared with a reference amount. this ratio can then be used amount.
What radioactive isotope would be best for determining the age of prehistoric human remains?
Carbon-14 is the best radioactive isotope for dating prehistoric human remains because it decays at a relatively slow, but measurable rate. By measuring the amount of carbon-14 left in the remains, scientists can estimate the age of the sample.
How can this be used to calculate the amount of a radioactive element compared to its original amount?
To calculate the amount of a radioactive element compared to its original amount, you need to use the radioactive decay equation: A = A₀ * e^(-λt), where A is the final amount, A₀ is the initial amount, λ is the decay constant, and t is the time elapsed. By plugging in the values for A₀, t, and λ, you can determine the final amount of the radioactive element.
