Problem $3(2$ pts$)$

Following the rules for significant figures $($see lecture slides and handout on Canvas for rules$),$ indicate

how many significant figures each of the following contain

a$)45\mathrm{.}0035$

b$)123\mathrm{.}5$E $6$

c$)134,500$

d$)0\mathrm{.}0001587$

Problem $4(3$ pts$)$

Following the rules for significant figures $($see lecture slides and handout on Canvas for rules$),$ perform

the following operations $(**=$ multiply$)[$If rounding is required, reference "Useful Significant Figures

Handout" for details$]$

a$)12\mathrm{.}1+57\mathrm{.}45+90\mathrm{.}472$

b$)364\mathrm{.}005**12\mathrm{.}30$

c$)\frac{7\mathrm{.}00}{22\mathrm{.}6795}$

d$)19\mathrm{.}03-5\mathrm{.}23+123\mathrm{.}935$

Problem $5(3$ pts$)$

Determine the units of the variable not provided $($must show work for credit$)$

a$)Q^{}=hA(T-T_f)$

$Q^{}=$ Heat Transfer rate in Watts or $\frac{J}{s}$

$A=$ Area in $m^2$

$T$&$T_f=$ Temperature in K or Kelvin

$h=?$

b$)F=\frac{3\text{d}\text{E}\text{I}}{L^3}$

$d=$ displacement in meters $($ m $)$

$E=$ Modulus of Elasticity in Pa or $\frac{N}{m^2}$

$L=$ Beam Length in meters $($ m $)$

$F=$ Force in Newton $(N)$

$I=?$