Book edition 1st Edition

Author(s) Paul Peter Urone

Pages 1272 pages

ISBN 9781938168000

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Short Answer

(a) Suppose that a person has an average heart rate of $72.0 beats / \min$ beats/ min. How many beats does he or she have in 2.0 y ? (b) In 2.00 y ? (c) In 2.000 y ?

In 2.0 years , there are only 2 significant figures. Hence, the number of beats is $7.6 \times 10^{7}$ beats.
In 2.0 years , since there are 3 significant figures. Hence, the number of beats is $7.57 \times 10^{7} beats$ .
There are 4 significant figures in 2,000 years, the $72.0 beats / \min$ only has 3 significant figures, so report the answer with 3 significant figures i.e., $7.573 \times 10^{7} b e a t s$ .

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Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: Definition of conversion factor

A conversion factor that determines how many units are equal to a unit.

Given Data:

Consider the given data as below.

Average heart rate is 72.0 beats/min .

Step 2: Calculating total beats

Multiply 72.0 beats/min by 2.0 years for calculating the number of beats she has in 2.0 years and hence after that use conversion factors to cancel the units of time.

$Numbers of beats = \frac{72 beats}{1 \min} \times \frac{60 \min}{1 hr} \times \frac{24 hr}{1 day} \times \frac{365 days}{1 yr} \times 2 years = 7.57382 \times 10^{7} beats$

In 2.0 years , there are only 2 significant figures. Hence, the number of beats is $7.6 \times 10^{7} beats$ .

(b) In 2.0 years , since there are 3 significant figures. Hence, the number of beats is $7.57 \times 10^{7} beats$ .

(c) Here, there are 4 significant figure in $2, 000 years$ , the $72.0 beats / \min$ only has 3 significant figures, so report the answer with 3 significant figures i.e., $7.573 \times 10^{7} beats$ .

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College Physics (Urone)

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Short Answer

(a) Suppose that a person has an average heart rate of $72.0 beats / \min$ beats/ min. How many beats does he or she have in 2.0 y ? (b) In 2.00 y ? (c) In 2.000 y ?

Step by Step Solution

Step 1: Definition of conversion factor

Step 2: Calculating total beats

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College Physics (Urone)

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Short Answer

(a) Suppose that a person has an average heart rate of 72.0 beats/min beats/ min. How many beats does he or she have in 2.0 y ? (b) In 2.00 y ? (c) In 2.000 y ?

Step by Step Solution

Step 1: Definition of conversion factor

Step 2: Calculating total beats

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