$6.5\mathrm{.}10$ Calculate the difference in blood flow rate for a $5-$cm section of a blood vessel with a pressure difference of $25$ mmHg that experiences an increase in blood vessel diameter from $100$ to $\backslash (200\backslash$mu $\backslash$mathrm$\{$~m$\}\backslash ).$ Also calculate the blood flow rate for a constriction that reduces the diameter to $\backslash (50\backslash$mu $\backslash$mathrm$\{$~m$\}\backslash ).$ For each of these three cases, what is the vascular resistance? Assume that blood viscosity is $3\mathrm{.}5$ cP $.$

$7.5\mathrm{.}11$: When a patient experiences high blood pressure, discuss what happens to the vascular flow rate. What changes must occur to allow the vascular flow rate return to normal conditions?

$8-8$C Consider the flow of air and water in pipes of

$8.$ the same diameter, at the same temperature, and at the same mean velocity. Which flow is more likely to be turbulent? Why?

P$6\mathrm{.}7$ SAE $10$ W $30$ oil at $\backslash (20^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ flows from a tank into a $2$ cm $-$diameter tube $40$ cm long.

$9.$ The flow rate is $\backslash (1\mathrm{.}1\backslash$mathrm$\{$~m$\}^\{3\}/\backslash$mathrm$\{$hr$\}\backslash ).$ Is the entrance length region a significant part of this tube flow?