3. An experiment was performed in the biomechanics lab to simulate the cardiac activity in order to investigate the relationship between blood’s viscosity and cardiac output. The experiment included a heart model which was able to generate a cardiac systolic pressure of 130 mmHg and a diastolic pressure of 85 mmHg; a set of flexible polymer tubes were used to simulate the blood vessels. The tubes had length of 200mm and dimeter ranging from 2 to 4mm in increment of 0.1mm. A fluid with viscosity similarly to that of blood (125 millipoise) was used in the experiment (1 mmHg. s = 7.5 *1e-7millipoise). Calculate and plot the viscosity resistance of the blood versus vessel radius and the cardiac output versus blood’s resistance. Discuss your findings.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.