PEMDAS

$\frac{1}{18}\frac{?}{24}$

ENGR $5-$ MATLAB

Lab $04-$ Array Practice

Open a new Microsoft Word document and type your name and homework number at the top.

For each problem, submit evidence of both your MATLAB code$/$commands and your output. Screenshot from MATLAB into the Word document, and add any additional comments, etc., as needed to explain your work. Organize your submission in order, with the problem numbers clearly indicated.

Think about what the results would be for the following MATLAB expressions, and then type them into MATLAB to verify your answers. $($Submit the results.$)$

Write MATLAB expressions to compute the following: $\sqrt[\phantom{2}]{19},3^{1\mathrm{.}2}tan()$

${19}^{{?}^{{?}^{?}}}(\frac{1}{2}),3^{{?}^{{?}^{?}}}(1\mathrm{.}2)$ tan $($pi$)$

The combined resistance $R_P$ of three resistors $R_1,R_2,$ and $R_3$ in parallel is given by:

$R_P=\frac{1}{\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}}$

Create variables for the three resistors and store values in each, and then calculate the combined resistance $R_P.$ Use values of $R_1=50,R_2=100,$ and $R_3=200.$

$R_p=0\mathrm{.}0025$

Create a variable ftemp to store a temperature in degrees Fahrenheit$($F$).$ Convert this to degrees Celsius $(C)$ and store the result in a variable ctemp. The conversion is $C=(F-32)**\frac{5}{9}.$

Use values for ftemp of $32F,212F,75F,$ and $-20F.$

Wind often makes the air feel even colder than it is$.$ The wind chill factor $($WCF$)$ measures how cold it feels with a given air temperature $T($in degrees Fahrenheit$)$ and windspeed $V($in miles per hour$).$ One formula for the WCF is:

$WCF=35\mathrm{.}74+0\mathrm{.}6215T-35\mathrm{.}75V^{0\mathrm{.}16}+0\mathrm{.}4275TV{V}^{0\mathrm{.}16}$

Create variables for the temperature $T$ and windspeed $V,$ and then use the formula above to calculate the WCF for $($a$)T=40F,V=20mph$ and $($b$)T=40F,V=50mph.$ Use arrays to store the $T,V,$ and WCF values.

$6.$ Create each of the following row vectors twice, first using linspace and then using the colon operator:

$($a$)1,2,3,4,5,6,7,8,9,10$

$7$ linspact $(1,10,10)$

$>(1$:$1$:$10)$

hat$($ start $)uarr$ end $t$ elcments

$uarruar{r}^{\text{u}\text{a}\text{r}\text{r}}$uarr end

Stat increment