The following data pertains to a hydraulic press: The diameters of the plunger and ram are 50 mm and 0.5 m respectively.

The ram is 1.75 m below the plunger and the mass density of the liquid

in the hydraulic press is 820 kg/m3. The mass of the plunger and the ram

are 6 kg and 400 kg respectively. The plunger is forced vertically down

by a lever with a mechanical advantage of 6 to 1 onto which a force of

800 N is applied. The ram moves upwards when the plunger moves

downwards. Determine the maximum lifting force exerted by the ram.​

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?