Physics for Scientists and Engineers: Foundations and Connections
Physics for Scientists and Engineers: Foundations and Connections
15th Edition
ISBN: 9781305289963
Author: Debora M. Katz
Publisher: Cengage Custom Learning
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Chapter 1, Problem 1PQ

The average life expectancy in Japan is 81 years. What is this time in SI units?

Expert Solution & Answer
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To determine

The average life expectancy in place J in SI units.

Answer to Problem 1PQ

The average life expectancy in place J in SI unit is 2.6×109s.

Explanation of Solution

The average life expectancy in place J is given in years. The SI unit of time is second.

Write an expression for converting the average life expectancy in place J in years to seconds.

  ts=ty(365day1y)(24h1day)(60min1h)(60s1min)        (I)

Here, ts is the average life expectancy in place J in seconds and ty is the average life expectancy in place J in years.

Conclusion:

Substitute 81y for ty in equation (I) to find ts.

    ts=(81y)(365day1y)(24h1day)(60min1h)(60s1min)=(81y)(3.15×107s/y)=2.6×109s

Thus, the average life expectancy in place J in SI unit is 2.6×109s.

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Chapter 1 Solutions

Physics for Scientists and Engineers: Foundations and Connections

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