The heart is supplied with 5 L/min of blood from the superior vena cava at point 1, which has a diameter of 24 mm. The ascending aorta discharges the heart at point 2 and has a diameter of 29 mm. Determine the pressure drop across the heart if it generates 4 μW (W = J/s = kg-m²/s³) during the process into the system with an efficiency is 70%, which reflects among, other things, friction losses.

A hand-driven tire pump has a piston with a 2.00 cm diameter and a maximum stroke of 25.0 cm.   a. How much work (in J) do you do in one stroke if the average gauge pressure is 2.40 ✕ 105 N/m2 (about 35 psi)?   b. What average force (in N) do you exert on the piston, neglecting friction and gravity?

You have a tube where water enters at a velocity of 10.0 m/s, ascends 5.0 m, and then exits. The pressure pushes the water in at 250 kPa, and is measured come out at 150 kPa. The outcoming water is, faster than the incoming water. slower than the incoming water. the same speed as the incoming water.

A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open to the air at the top. Friction is absent. The spring constant of the spring is 3600 N/m. The piston has a negligible mass and a radius of 0.010 m. (a) When the air beneath the piston is completely pumped out, how much does the atmospheric pressure cause the spring to compress? (b) How much work does the atmospheric pressure do in compressing the spring?   * I know that a is = 0.0088422743 m  but b is NOT 8.950712099 J (wrong) please show work of how to work part b.

A hand-driven tire pump has a piston with a 2.1 cm diameter and a maximum stroke of 24 cm. (a)  How much work do you do in one stroke if the average gauge pressure is 2.1 × 105 N/m2?  (b)  What average force do you exert on the piston, neglecting friction and gravitational force?