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The fracture strength of glass may be increased by etching away a thin surface layer. It is believed that the etching may alter the surface crack geometry (i.e. reduce crack length and increase tip radius). Calculate the ratio of the etched and original crack tip radii if the fracture strength is increased by a factor of 3 when 75.0% of the crack length is removed.
suppose the rate of growth of a bacterial population n cellsliter is described by dndt kn -1000. the terms represent
A Rankine cycle power plant is being developed to operate an irrigation system. In this power plant solar energy will be used to boil a low boiling point fluid within glazed flat plate solar collectors. The working fluid that has been selected is the..
a rigid vessel contains 10 kg of steam. the steam is initially at 10 bar and 300 c. after a period of time the pressure
refrigerant-22 is condensed from 120degc 1.40 mpa to saturated liquid using air at 24degc 1.00 bar. the air absorbs
air at 1 atm 90f and 8 fts enters a thin-walled tube of 4-inch diameter. the tube surface temperaure is maintained at
A worker in factory wants to load a cylindrical specimen of metal alloy in compression. The elastic and shear modulus for this alloy is 105GPa and 39.7 GPa, respectively. If its original and final diameters are 20mm and 20.025mm respectively and its ..
a hot iron block at 300 ordmc of sides 15 cm by 20 cm by 25 cm is placed on insulated horizontal surface with its 15 cm
Determine the entropy generation during the process on the basis of 1 mole of ethane.
you are designing a remote-area power supply based on a miniature wind turbine that is 20 efficient. meteorological
for a separations process it is necessary to determine the vapor-liquid equilibrium compositions of a mixture of a and
two moles of nitrogen are initially at 10 bar and 600 k state 1 in a horizontal pistoncylinder device. they are
a turbine produces 2 mw of power while accepting steam at 3 mpa and 400 c and rejecting steam at 50 kpa and 100c. find
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