An interactive introduction to MATLAB

3.1script files 37

Exercise 5: Scripts

Write your own script files to solve the following problems:

1. The absolute pressure at the bottom of a liquid store tank that is vented
   to the atmosphere is given by:

Pabs,bottom=ρgh+Poutside,

where:

Pabs,bottom=the absolute pressure at the bottom of the storage tank (Pa)

ρ=liquid density (kg/m^3 )

g=acceleration due to gravity (m/s^2 )

h=height of the liquid (m)

Poutside=outside atmospheric pressure (Pa)

FindPabs,bottomin SI units ifρ=1000 kg/m^3 ,g=32.2 ft/s^2 ,h=7 yd,

andPoutside=1 atm.

Here are some tips to help you get started:

• Remember your header section and variable dictionary.


• Useinputfunctions to gather information from the user.


• Convert all units to SI before performing the calculation. Use the
  following conversion factors:
  ft_to_m = 0.3048
  yd_to_m = 0.9144
  atm_to_Pa = 1.013E5


• CalculatePabs,bottom
  [Answers: 164121 Pa ]
  Example adapted from Patzer (2003)