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HP 35s User Manual

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hp calculators 
 
 
 
 
HP 35s  Applications in Mechanical Engineering 
 
 
 
 
Applications in mechanical engineering 
 
Practice solving problems in mechanical engineering 
 
- Application 1: Stress on an element (Mohr circle) 
 
 
   

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hp calculators 
 
HP 35s  Applications in Mechanical Engineering 
 
hp calculators - 2 - HP 35s  Applications in Mechanical Engineering - Version 1.0 
 
Applications in mechanical engineering 
 
This training aid will illustrate the application of the HP 35s calculator to several problems arising in mechanical 
engineering. These examples are far from exhaustive, but do indicate the incredible flexibility of the HP 35s calculator.  
Practice solving problems in mechanical engineering  
Application 1:...

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hp calculators 
 
HP 35s  Applications in Mechanical Engineering 
 
hp calculators - 3 - HP 35s  Applications in Mechanical Engineering - Version 1.0 
 
 
 In RPN mode: !###$###%&!()*###+
++++(),-(./+ 
 In algebraic mode:++-()4!###&###%0!0+
++++,()*###$(./  
 Figure 6  
 Solve for the principal stress, s1.  
 In RPN mode: !###$###%,!1/,  
 In algebraic mode:++4!###,###%0!,1/$+
+++++
 Figure 7  
 Solve for the principal stress, s2.  
 In RPN mode: !###$###%,!1/&  
 In algebraic mode:++4!###,###%0!&1/$...

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HP 35s  Applications in Medicine 
 
 
 
 
Applications in Medicine 
 
Practice solving problems in medicine 
 
- Application 1: Beer’s Law 
 
- Application 2: Body Surface Area (BSA) 
 
- Application 3: Schilling Test for  
  Vitamin B12 Absorption 
 
 
 
   

Page 216

 
hp calculators 
 
HP 35s  Applications in Medicine 
 
hp calculators - 2 - HP 35s  Applications in Medicine - Version 1.0 
 
Applications in Medicine 
 
This training aid will illustrate the application of the HP 35s calculator to several problems arising in medicine. These 
examples are far from exhaustive, but do indicate the incredible flexibility of the HP 35s calculator. 
 
Practice solving problems in medicine 
 
Application 1: Beer’s Law 
 
 Beers law is a physical law which states that the...

Page 217

 
hp calculators 
 
HP 35s  Applications in Medicine 
 
hp calculators - 3 - HP 35s  Applications in Medicine - Version 1.0 
 
 In RPN mode: )*#+,!- 
 
 In algebraic mode:((,)*#+-! 
 
 Figure 5 
 
Answer: The absorbance of the unknown is 34% and the solute concentration of the unknown is 1.65 mg/ml.  
 Figures 4 and 5 indicate the display in RPN mode. 
 
Application 2: Body Surface Area (BSA) 
 
 There are two primary methods used to estimate body surface area, the Dubois method and the Boyd 
Method....

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HP 35s  Applications in Medicine 
 
hp calculators - 4 - HP 35s  Applications in Medicine - Version 1.0 
 
 Now solve for the BSA using Boyd’s formula. Note that Boyd’s formula requires the weight to be input  
 in grams. Figure 9 shows the answer in RPN mode. 
 
 In RPN mode: )*.!2/)*)+22(
(((($1/))%&345-0(
((((+.$)*10-)*)))1!).- 
 
 In algebraic mode:(($1/))04)*.!2/(
(((()*)+22-%&$1/))66-(
((((+.$0)*1-)*)))1!). 
 
 Figure 9 
 
Answer: Dubois’ method estimates a BSA of 1.78 m2, while...

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HP 35s  Applications in Medicine 
 
hp calculators - 5 - HP 35s  Applications in Medicine - Version 1.0 
 
  
 Figure 12 
 
(In either RPN or algebraic mode, press:  $1/))? 
(
 Figure 13 
 
(In either RPN or algebraic mode, press:  +.$? 
 
 Figure 14 
 
Answer: Boyd’s method estimates a BSA of 1.76m2. Additional problems can be solved using this equation, if 
desired. Figure 14 displays the result. 
 
Application 3: Schilling Test for Vitamin B12 Absorption 
 
 The Schilling Test...

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HP 35s  Applications in Medicine 
 
hp calculators - 6 - HP 35s  Applications in Medicine - Version 1.0 
 
Solution: V is 2.54 liters, DIL is 20, the Urine CPM is 1923, the standard CPM is 1757, and the background CPM  
 is 127. 
 
 In RPN mode: !*/#!),+@!1+!.(
((((+./.+!.,-+))-(
 
 In algebraic mode:((!*/#,!)-(
((((44+@!1+!.6,(
((((4+./.+!.66-+)) 
 
 Figure 16 
  
Answer: The amount excreted is 13.99%. The amount absorbed is 86.01%. Figure 16 shows the answer in  
 algebraic mode....
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