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Introduction9
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To calculate the heat loss of the water heater, merely press the following keys in
order.
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15.0000
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30 _
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450.0000
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.47 _
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211.5000
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Programming the Sample Problem
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The water heater in the example loses about 212 Btu every hour at the 15-degree
temperature difference. Suppose you decide to calculate the heat loss of the
water at many temperature differences. You could calculate the heat
loss manually for each temperature difference. Or an easier and
faster method is to write a program that will calculate the heat
loss for any temperature difference.
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Now let’s write, load and run a program to do just that!
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Writing the program. You have already written it! The program is
the same series of keystrokes you executed to solve the problem manually.
One additional instruction, a label, is used to define the beginning
of the program.
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Loading the program. To load the instructions of the program into the
HP-41C:
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Press the following keys in order. The display shows symbols or names
representing each instruction entered. The calculator records (remembers)
the instructions as you entered them.
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