The radius of the aorta in a test subject determined by mri is 1.2 cm. at rest, his end diastolic volume is 140 ml and his end systolic volume is 55 ml. his diastolic pressure is 70 mm hg and his systolic pressure is 115 mm hg. if we start the cardiac cycle at the opening of the mitral valve, the aortic valve in this person opens at 0.55 seconds and closes at 0.9 seconds. the entire cycle lasts 1.1 seconds in this person. the density of blood is 1.055 g ml-1 and its viscosity is 3.0 x 10-3 pa s. a pascal is a n m-2. using this information, answer the following questions: a. what is the stroke volume? b. what is the heart rate? c. what is the cardiac output? d. what is the period of ejection? e. what is the average velocity of blood in the aorta? f. what is the reynolds number for blood during ejection? g. is blood flow in the aorta laminar or turbulent? h. what is the kinetic energy of the ejected blood? j. w hat pressure-volume work is done during ejection?

In what direction does the medium move relative to the direction of the wave? explain.

Air is held within a frictionless piston-cylinder container, which is oriented vertically. the mass of the piston is 0.45 kg and the cross-sectional area is 0.0030 m2. initially (state 1) the pressure of the gas is sufficient to support the weight of the piston as well as the force exerted by the atmospheric pressure ( 101.32 kpa). the volume occupied by the air within the cylinder in state 1 is 1.00 liter. one end of a spring (with spring constant k = 1000 n/m) is attached to the top of the piston, while the other end of the spring is attached to a stage that can move vertically. initially the spring is undeflected and therefore exerts no force. then the stage is then moved quasistatically downward a distance of 10.0 cm, at which point the system reaches state 2. the piston-cylinder is not insulated; rather it remains in diathermal contact with the surroundings, which are at a constant temperature of 300 k. what is the change of pressure within the container?

How does the entropy of steam compare to the entropy of ice?