College Physics

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



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.

Unreasonable Results

A nuclear physicist finds 1.0 (g of 236U in a piece of uranium ore and assumes ii is primordial since its half−life is 2.3 × 10 7 y . (a) Calculate the amount at 236U that would had to have been on Earth when it formed 4.5 × 10 9 y ago for 1.0 (g to be left today. (b) What is unreasonable about this result? (c) What assumption is responsible?

To determine


The initial amount of 236U


Given info:

The half life of 236U


The mass of 236U left


Time taken to formed 236U is


Formula used:

To calculate mass the formula is used,

  m=moe0.693tt 1/2


Substituting the values



To determine

The unreasonable in result.


To determine

The cause of unreasonable in result.

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