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If the half-life of a radioactive isotope is 10 million years, then how much of a sample of that isotope will remain after 40 million years? Recall that the equation for half-life of a sample is: fraction remaining = 2^{-\frac{time}{half-life An isotope has a half-life period ...
After four half-lives, 10 grams of uranium remain in a sample. How many grams of uranium did the sample start with? If a sample starts with 20 grams of a radioactive material at 1:00 PM and 5 grams remain at 2:00 PM, how many hours is ...
U-238 is a radioactive metal that producesalpha and beta particles. In its solid form, it is not particularly dangerous because its half-life is 4.5 billion years, meaning that the atomic decay is very slow. Depleted uranium is used, for example, in boats andairplanesas ballast. The three...
Potassium-40 is another radioactive element naturally found in your body and has a half-life of 1.3 billion years. Other useful radioisotopes for radioactive dating include uranium-235 (half-life = 704 million years), uranium-238 (half-life = 4.5 billion years), thorium-232 (half-life = ...
How much uranium is in a nuclear bomb? According to the Union of Concerned Scientists, a nuclear bomb needsabout 33 pounds (15 kilograms)of enriched uranium to be operational. The bulkiness of other bomb materials also make it harder to apply the technology to existing long-range missile syste...
The small amount that gets absorbed, though, spreads throughout the body. It is most likely to accumulate in the bones or the kidneys. Uranium can remain in bones for a long time; the half-life of uranium in bone tissue is 70–200 days. Uranium that settles in other tissue leaves the...
Tritium is in short supply and has a short half-life. Fuel in the bomb must be continuously replenished. Deuterium or tritium must be highly compressed at high temperature to initiate the fusion reaction. Scientists overcome the first problem by using lithium-deuterate, a solid compound that do...
More oil has become available since this date, but this oil is generally more expensive to extract. Figure 2. Energy consumption per capita for the combination of oil, coal, and electricity from uranium, separately for the Advanced Economies and the Other than Advanced Economies, based on ...
of highly enriched uranium. This is not a product placement. It's just -- in fact, if I was Coca Cola, I'd be pretty distressed about this -- (Laughter) -- but basically, this is it. 00:00 This is what you would need to steal or buy out of that 100-metric-ton st...