3. The intensity of radiation of a radioactive substance was measured at half-year intervals. The results were: t (years) 1.5 2 2.5 0.985 0.979 0.977 Y t (years) 3 3.5 4 4.5 5 5.5 Y 0.972 0.969 0.967 0.960 0.956 0.952 where y is the relative intensity of radiation. Knowing that radioactivity decays exponentially with time: y (t) ae-bt, estimate the radioactive half-life of the substance. 0.5 0 1.000 0.994 = 1 0.990

3. The intensity of radiation of a radioactive substance was measured at half-year intervals. The results were: t (years) 1.5 2 2.5 0.985 0.979 0.977 Y t (years) 3 3.5 4 4.5 5 5.5 Y 0.972 0.969 0.967 0.960 0.956 0.952 where y is the relative intensity of radiation. Knowing that radioactivity decays exponentially with time: y (t) ae-bt, estimate the radioactive half-life of the substance. 0.5 0 1.000 0.994 = 1 0.990

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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