What is radioactive decay?

Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation. The rate of decay follows an exponential law characterized by the half-life.

Half-life is the time it takes for half of a radioactive substance to decay. After one half-life, 50% remains; after two, 25%; after three, 12.5%, and so on.

What is the decay constant?

The decay constant (lambda) is related to the half-life by lambda = ln(2)/t_half. It represents the probability per unit time that a given atom will decay.

How is radioactive decay used in carbon dating?

Carbon-14 has a half-life of 5,730 years. By measuring the ratio of C-14 to C-12 in organic remains, scientists can estimate how long ago the organism died.

Radioactive Decay Calculator

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About Radioactive Decay Calculator

Enter initial amount, half-life, and time to find the remaining amount, or provide the remaining amount to solve for elapsed time. The calculator shows exponential decay steps, computes the decay constant, and reports what fraction of the original sample remains.

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FAQ

What physics calculations can this tool perform?

This tool handles kinetic energy (KE = 1/2mv²), torque (τ = Fd sin θ), ideal gas law (PV = nRT), specific heat (Q = mcΔT), radioactive decay (N(t) = N₀(½)^(t/t½)), and Reynolds number (Re = ρvL/μ).

Are the results accurate?

Yes. All calculations use deterministic algorithms and verified physical constants. Every result is mathematically guaranteed to be correct.

Is this physics calculator free?

Yes! All physics calculations are completely free with detailed step-by-step explanations. No account required.

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