Sue Ann Apolinar hired a guide through Arkansas Valley Adventures, LLC, for a rafting excursion on the Arkansas River. At the outfitter's office, Apolinar signed a release that detailed potential hazards and risks, including "overturning," "unpredictable currents," "obstacles" in the water, and "drowning." The release clearly stated that her signature discharged Arkansas Valley from liability for all claims arising in connection with the trip. On the river, while attempting to maneuver around a rapid, the raft capsized. The current swept Apolinar into a logjam where, despite efforts to save her, she drowned. Her son, Jesus Espinoza, Jr., filed a suit in a federal district court against the rafting company, alleging negligence. What are the arguments for and against enforcing the release that Apolinar signed? Discuss.

The pressure at the exit of an air compressor is $150 \mathrm{~psia}$. What is this pressure in $\mathrm{~kPa}$ ?

If the spring of constant k is compressed a distance $\delta$, calculate the acceleration arel of the block of mass $m_1$ relative to the frame of mass $m_2$ upon release of the spring. The system is initially stationary.

What mass of propane $(C_3 H_8)$ must be burned in a barbecue grill to release 4560 kJ of heat? The $\Delta H_{\mathrm{comb}}$ comb of propane is -2219 kJ/mol.

Reducing sample bias may result in a less positive outcome overall, which may delay or stop the release of a drug that a subset of the population might benefit from. Is this an acceptable tradeoff?

The pressure in a natural gas pipeline is measured by the manometer shown in the figure with one of the arms open to the atmosphere where the local atmospheric pressure is $14.2$ psia. Find the absolute pressure in the pipeline.

Write true if the statement is true. If it is false, change the underlined word or words to make the statement true. In a fuel cell, $\underline{\text{water}}$ molecules split to release hydrogen ions.

The pressure in pipe $B$ in the previous problem is reduced slightly. Determine the new pressure in pipe $B$ if the pressure in pipe $A$ remains the same and the reading along the inclined leg of the manometer is $11 \mathrm{~cm}$.

Choose the best answer. Which is NOT a property that determines how air circulates in the atmosphere? (a) water vapor capacity (b) adiabatic heating/cooling (c) density (d) latent heat release

The blood pressure of Mr. Avocado while at rest can be approximates by the function $\mathrm{p}(t)=85+25 \sin (2 \pi t)$ where $\mathrm{p}(t)$ is in milligrams of mercury $(\mathrm{mmHg})$ and $t$ is in seconds.

a. Graph $\mathrm{p}(t)$ in the interval $[0,3]$.

b. Find the period of $\mathrm{p}(t)$.

c. Find the amplitude of $\mathrm{p}(t)$.

d. The higher value of the blood pressure is called the systolic pressure. Find Mr. Avocado's systolic pressure.

e. The lower value of the blood pressure is called the diastolic pressure. Find Mr. Avocado's diastolic pressure.

The air pressure before a storm was 29.15 inches. After the storm, the pressure was 28.79 inches. Write and solve an addition equation to find how much the pressure changed during the storm.

A Miller cycle has state 1 as 150 kPa, 300 K, a compression ratio of 9, and an expansion ratio of 14. If P4 is 250 kPa, find the heat release in the combustion.

An automobile cooling system typically operates at a pressure higher than atmospheric pressure. Why is that desirable?

Fill in the missing term(s) to complete the following sentences.

Blood pressure is the force of the blood surging against the walls of the arteries. Each heartbeat consists of two parts. The first is the contraction, called and the second is the relaxation, the,_______ is the measurement of the systolic pressure followed by the diastolic pressure.

Normal blood pressure for an adult is 120/80. The number 120 represents the pressure within the walls of an artery during systole, or during the contraction; the number 80 represents the pressure within the arterial wall during diastole, or during relaxation. Pulse pressure represents the difference between the diastolic and systolic readings. In blood pressure of $120 / 80$, the pulse pressure is 40 , which represents the strength of the left ventricle pumping blood to the body.