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A slab of dry wood of 4-in. thickness and sealed edges is exposed to air of 40% relative humidity. Assuming that the two unsealed faces of the wood immediately jump to an equilibrium moisture content of 10 lb H20 per 100 lb of dry wood, determine the time for the moisture to penetrate to the center of the slab (2 in. from either face). Assume a diffusivity of water in the wood as 8.3 x l0-6 cm2/s.
gold has a face centered cubic crystal structure where there are four atoms per unit cell.below is a calculated xrd
The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of indium gallium arsenide absorbs light with a wavelength less than 1.37 microns. What is the band gap of the indium gallium arsenide samp..
Calculate the atomic weight (in amu) of an element (X), given the following data: 24X : 24.000 amu at 0.7879 fractional abundance 26X : 26.000 amu at 0.1017 fractional abundance 25X : 25.000 amu at 0.1113 fractional abundance
Calculate the energy required to heat 1kg of CO 2 from 400ºC to 600ºC at a constant pressure of 1atm using:-
question 1suppose the system shown below. initially the gas is at 200 kpa and occupies a volume of 0.1 m3. the spring
Express the maximum radius (Rmax) and maximum thickness (Tmax) in terms of bulk oxygen concentration, Cb (mol/mL), diffusivity of oxygen through the device D (cm2/s) and maximum oxygen consumption rate, Vmax (mol/mL/s).
Why is it important - where does galvanising fit into possible corrosion protection strategies?)
primitive problem statementa 100 million tonsyear chemical product as shown in the table 1 is to be manufacture as per
Risk Analysis and Management: Fragility versus Loads and Fire Explosion Safety Issues, 1. A propane tank is located 100 m away from the nearest buildings. The fragility to explosion can be expressed by
What is the volumetric efficiency
Consider that you are a senior consulting engineer and that you need to explain the topic in a written report to your customer, who is the managing director of a large company, and a commerce or law graduate.
when sulfuric acid is a component of polluted air it chemically attacks statues memorials and monuments made from
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