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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

Data from the appendices and the periodic table may be needed for these problems.

A 60Co source is labeled 4.00 mCi, but its present activity is found to be 1.85 × 10 7 Bq . (a) What is the present activity in mCi? (b) How long ago did it actually have a 4.00—mCi activity?

To determine

(a)

What is the present activity in mCi if a C60o source is labeled 4.00 mCi, but its present activity is found to be 1.85×107Bq ?

Explanation

Given info:

Formula used:

Calculation:

Present activity,

  R=1.85×107Bq=1.85×1073.70×1016=5

To determine

(b)

How long ago did it actually have a 4.00-mCi activity?

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