Use Q = Q0e-kt, where Q0 is the initial amount of uranium and k is the factor of proportionality. Since we know that Q = 1/2 Q0 when t = 74, we have 1/2Q0 = Q0e-k x 74; 1/2 = e -74k; In 1/2 = -74k; k = 0.009366853
The process of decreasing in number, size, quantity, or extent.Decrease, loss, decrement, reduction, diminution, decline, decay, etc. Decrement.
A = A0 e-Bt
That all depends on the problem given!A general form of the exponential growth/decay is:y = ab^x.If we have an exponential growth, b = 1 + rOtherwise, b = 1 - r.In the second version, the exponential growth is y = Ae^(kt) while the exponential decay is y = Ae^(-kt)
Yes.
Selling a naked put is a bullish strategy, and is mathematically the same as a covered call write, where you buy something and sell a call against it. Selling a naked call is a bearish strategy, and is the same as covered short write, where you short something and write a put against it. In either case, you make money from time decay, falling volatility, or a move in the direction that you want.
nuclear decay is a simple random process, the more of something there is the more of it will decay if the probability of decay is constant (which it is).the simplest way to quantify this is halflife, as you mention. but there is nothing special about halves, it can also be specified by the decay constant k that appears in the exponential decay function: n = n0 e-kt where n0 is initial quantity, n is current quantity, and t is time since initial time. or you could choose to specify it in thirdlife, quarterlife, fifthlife, hexadecilife, centlife, or whatever... but nobody else does.
no, halflife is a constant for each isotope's decay process.
Copper-67 undergoes beta decay with a halflife of 59 hours, becoming stable Zinc-67.
U-238 --> alpha + gamma + Th-234, halflife 4.51E9 yearsTh-234 --> beta- + gamma + Pa-234, halflife 24.10 daysPa-234 --> beta- + gamma + U-234, halflife 6.66 hours
The halflife is 2.1 days. Multiply that by about 5 to get the time to decay to near zero.10.5 days or so.
A quantity is said to be subject to exponential decay if it decreases at a rate proportional to its value. The time required for the decaying quantity to fall to one half of its initial value.Radioactive decay is a good example where the half life is constant over the entire decay time.In non-exponential decay, half life is not constant.
Carbon dating measures the amount of carbon halflives that an object's carbon-14 has seen. A halflife is the amount of time it takes for half of the C-14 present to decay into a different element (N-14). A carbon halflife is 5730 years so you wouldn't be able to tell with such a small amount of time.
A sample of 187 rhenium decays to 187-omium with halflife of 41.6 billion years. If all 188 osmium are normalized isotopes.
The length of time required for half of a sample of radioactive material to decay
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.
the halflife is 10 days
which element present in our toothpaste protects out tooth from the tooth decay?