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1.57. Set Up:
Estimate 2 ft per step and 100 steps per minute. Use:
Solve: (a)
The distance is
The number of steps is calculated as this dis
tance divided by the distance per step:
(b)
The time in minutes is the number of steps required divided by the number of steps per minute
At 8 h per day it takes about 120 days.
1.58. Set Up:
Assume you walk 1 mile each way.
Solve: (a)
In 15 years, there are 780 weeks. If 45 weeks are vacation, you walk 735 weeks which represents 3675
working days. Since you walk 2 miles per working day,
(b)
In the U.S., this is approximately the equivalent of two coasttocoast trips.
1.59. Set Up:
Calculate the volume of liquid in liters using
Use the result to calculate
the mass of arsenic using the given arsenic per liter quantity
and the unit conversion
Solve:
You drink
or
The mass of arsenic received
per day is
Reflect:
While this is a very small amount of arsenic, concern about the accumulation in the body over a long period
of time may exist.
1.60. Set Up:
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 Spring '07
 Shoberg

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