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Problem: A composite material used for rock-drilling bits consists of tungsten carbide cubes, each 20 micrometers in size, stuck together with a thin layer of cobalt. The material is required to withstand compressive stresses of 4,000 MN/m^2 in service. Use the equation k=sigma y/2 to estimate an upper limit for the thickness of the cobalt layer. Assume compressive yield stress of tungsten carbide is well above 4000 MN/m^2 and that cobalt yields in shear at k=175 MN/m^2.
What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself.
in the absence of compressed liquid property tables it is common to approximate properties by using the saturated
find the image region in the w plane
a c-130 pilot desires to fly a low-level navigation mission at 4 n milesmin 240 kn ground speed. winds are forecast out
What are the advantages and disadvantages of such a system of "distributing" the pollution? Does spreading the pollution solve the health problem and/or reduce citizen complaints?
a refrigerant 134a at 140 kpa and -10 degree celcius is compressed by an adiabatic 16kw compressor to an exit state of
Determine the pin force due to inertia of the driven wheel, and determine the torque on the driving shaft.
landing gear system structural designproblem statement consider the landing gear shown below. working in teprns of two
A machine has a first cost of $45 000 and operating and maintenance costs of SO.22 per unit produced. It will be sold for $4500 at the end of five years.
a rigid 1.0 m3 tank contains water initially at 120degc with 50 liquid and 50 vapor by volume. a pressure-relief valve
a rigid well-insulated tank contains a two-phrase mixture of ammonia with .0025ft3 of saturated liquid and 1.5 ft3 of
Independent Living Developments Inc. has recently awarded a project for the first phase of the detailed design of a system to deliver potable water.
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