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A cooked mashed potato is cooled on trays in a chilling unit with refrigerated air at 2 C blown over the product surface at high velocity. The depth pf the product is 30mm and the initial temperature is 95 C. The product has a thermal conductivity of 0.37 W/ (m K), specific heat of 3.7 kJ/kg K and density of 100 kg/m^3. Assuming negligible resistance to heat transfer at the surface, calculate product temperature at the center after 30 min.
ateam at 5 bar 320 c enters a steady state turbine with a volumetric flow rate of 0.65m3s and evpands adiabatically to
a cycle based on a rankine cycle with water as the work fluid must have its highest cycle pressure and temperature at
a thin-flat plate having a length of l 10 cm is heated by a constant-heat flux from the bottom and cooled by an air
noting that a person standing in a room maintained at 20degc at all times the inner surfaces of the walls floors and
Determine the maximum normal stress in a 300-mm diameter basketball that has a 2-mm wall thickness after it has been inflated to a pressure of.
due to a poorly designed foundation the statue at point a slowly slides down a grass covered slope. to prevent further
Steam @ 10 MPa, 600 degrees celcius enters the first-stage turbine of an ideal Rankine cycle with reheat. The steam leaving the reheat section of the steam generator is @ 500 degrees celcius
calculate the bulk density of a rock which has 20 porosity. the bulk mineralogy of the rock is 80 quartz 15 calcite and
An insulated tank is divided into two parts by a partition. One part of the tank contains 2.5 kg of compressed liquid water at 60°C and 600 kPa while the other part is evacuated. The partition is now removed, and the water expands to fill the entire ..
a turbine operates at steady state with steam flowing through it at a rate of 36 kgmin. the steam enters the turbine at
an adiabatic piston-cylinder system contains a 1000-w immersion heater and 4kg of h2o initially at 1 atm and 96 percent
atank of 0.1-m3volume contains air at 298.15k 25degc and 101.33kpa.the tank is connected to a compressed-air line which
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