A vertical piston-cylinder assembly with a piston of mass 20 kg and having a face area of 40 cm² contains air. The mass of air is 2.5 g, and initially the air occupies a volume of 2.5 liters. The atmosphere exerts a pressure of 100 kPa on the top of the piston. The volume of the air slowly decreases to 0.001 m³ as energy with a magnitude of 1 kJ is slowly removed by heat transfer. Friction between the piston and the cylinder wall can be neglected and g = 9.8 m/s². Determine the work done by the air on the piston during the process, in kJ, and the change in specific internal energy of the air, in kJ/kg.

At atmospheric pressure (100 kPa), the blood of a bilaterally inverted snerg blat has a specific volume of 0.1917 m3/kg and a specific internal energy of 212.18 kJ/kg. What is the specific enthalpy of its blood in kJ/kg

The piston of a vertical piston-cylinder device containing a gas has a mass of 50 kg and a cross- sectional area of 0.04 m2, as shown in the figure. The local atmospheric pressure is 0.97 bar, and the gravitational acceleration is 9.81 m/s². What is the pressure inside the cylinder?

(a) During the packaging process, a can of soda of mass 0.4 kg moves down a surface inclined 20° relative to the horizontal, as shown in the figure below. The can is acted upon by a constant force R. parallel to the incline and by the force of gravity. The magnitude of the constant force R is 0.05 N. Ignoring friction between the can and the inclined surface, determine the can's change in kinetic energy, in J, and whether it is increasing or decreasing. If friction between the can and the inclined surface were significant, what effect would that have on the value of the change in kinetic energy? Let g = 9.8 m/s² Final location Soda 20° m=0.4 kg- 1.5 m ↓ Initial location Soda R = 0.05 N Soda