Respuesta :

MathPhys

Answer:

1.28×10⁻⁵ s⁻¹

Explanation:

The decay constant λ is defined as:

λ = (ln 2) / T,

where T is the half life.

Convert hours to seconds:

15 h × (3600 s/h) = 54,000 s

Plug and solve:

λ = (ln 2) / (54,000 s)

λ = 1.28×10⁻⁵ s⁻¹