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An experiment involves heating a very small sphere that is suspended by a fine string in air with a laser beam in order to induce the highest sphere temperature possible. After inspecting Equation 9.64, a research assistant suggests inducing a uniform downward airflow to exactly offset free convection from the sphere, thereby minimizing heat losses and maximizing the steady-state sphere temperature. In the limiting case of a very small sphere, what is the minimum value of the convection heat transfer coefficient expressed in terms of the sphere diameter and thermal conductivity of the air?
Calculate the maximum cell mass on a dry basis per Liter of the fermenter that can be obtained if the wet cell density is 1.1 g/cm3. Note that cells themselves consist of about 75% water and 25% solids, and cell mass is reported as dry weight in t..
1000 kg/hr of a mixture containing 42 mole percent heptane and 58 mole percent ethyl benzene is to be fractionated to a distillate containing 97 mole percent heptane and a residue containing 99 mole percent ethyl benzene using a total condenser an..
Find the relationship between voltage across the membrane and the concentration of CaCl2 before equilibrium is reached.
1. A newly constructed power plant proposes to burn coal with a sulfur content of (a) 1.8 and (b) 2.4 percent by weight. If the plant is to meet the new source review performance standard (see attached CFR new source regulation), what percent of SO 2..
Describe the major technical areas involved in engineering a new biomaterial such as a contact lens. Are there differences with other biomaterial based products?
The diode's saturation current is given to be 10-12 A and the I-V curve is shown in Figure P7.2.6. Find the current through the diode in the circuit by graphical analysis.
A 12.6-g sample of acetylene, C2H2, produced a temperature increase of 16.9C in the same calorimeter. What is the energy of combustion of acetylene (in kJ/mol)?
Calculate the volume of 0.25 M NaI that would be needed to precipitate all the g2+ion from 45 mL of a 0.10 M Hg(NO3)2 solution according to the following reaction:
Determine the efficiency when the transformer delivers a load of 2 kVA at 0.85 power factor lagging.
What is the degree of a binary, minimal polynomial of a primitive 17-th root of unity .How many such polynomials do exist? Prove that each is its own reciprocal. Determine these polynomials explicitly.
question 1a the radiation protection act 2003 makes provisions for the protection of people against the risks from
Describe a model that allows you to explain the multiplicity of the energy of the brick molecules and the water molecules in such a way to explain the observe changes in temperature of the brick and the water.
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