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Industries use displacement washing with solvent to separate solutes from the voids in a porous medium. Tarleton, Wakeman, and Liang (Trans IchemE, 2003) developed a new technique to improve separation of solid-liquid mixture, using an electric field during washing. They recorded zeta potential of titania (TiO2) in 0.01 or 0.001 M concentrations of NaNO3 solutions at different pH levels. The data from their experiments are listed in table at the right. The zeta potential is the overall charge a particle acquires in a specific medium. It is used to understand and control colloidal suspensions, emulsions, and slurries. Its value is related to the stability of colloidal dispersions. Colloids with high zeta potential (negative or positive) are electrically stabilized. Colloids with low zeta potentials tend to coagulate or flocculate.
a Make a scatterplot of zeta potential against the solution pH for each NaNO3 concentration.
b Describe the nature of the relationships.
c Fit the appropriate model to describe the predicted zeta potential.
Determine for each of following 4 signals if it is bandlimited and, if yes, find the minimum sampling rate without causing aliasing. (a) x1(t) = cos(500pt) + sin(700pt); (b) x2(t) = sin2(50pt);
An archaeologist finds the 14C in a sample of 3.0 g of material to be decaying at 107 counts per second. A modern 1.0 g sample of the same material decays at 151 counts per second. The half-life of 14C is 5730 years
A Technician is send to Residential House,and theHome-Owner complains that he doesn't have Emergency-Heat.However,when the Technician arrive the A ir Condition works &Heat works,but the Emergency-Heat still doesn't come on.
X1 and X2 are two independent Gaussian random variables each with mean zero and unit variance.
Determine the gain K so that the phase margin is 45 degrees. For the gain K selected in part (a), determine the gain margin. Predict the bandwidth of the closed-loop system.
How to apply forming voltage and after that how to repeat it. What is the necessity of forming voltage in RRAM.
Consider a hollow cylinder with a length L along the z-axis and a radius R and a charge -Q, containing a wire also of length L and charge Q running co-axially to the cylinder at its center.
A random signal X can be observed only in the presence of independent addictive noise N. The observed quantity is Y = X + N.The joint probability density function of X and Y is f(x,y) = K exp[-(x2 + y2 + 4xy)] all x and y
Dc input supply voltage VS = 48 V dc, where as the source available is an ac with 230 V (rms). Determine the values of Le and Ce for the output LC-filter. Determine the (peak and rms) voltage ratings and the (average, rms, and the peak) current for a..
Determine the maximum power that a 430 km, high-voltage 3-phase transmission line can transmit if the system voltage is 550kV and the impedance of the line is 0.5 ohm/km. Determine illuminance at a distance of 12 ft from source.
Common radio uses two modulation schemes-they are AM and FM.Explain very briefly what the FM scheme is. How does it differ fromAM what are the advantages and disadvantages of each scheme
Electrons and holes are moving in a uniform, onedimensional electric field E = +2500 V/cm. The electrons and holes have mobilities of 700 and 250 cm2/V · s, respectively. What are the electron and hole velocities
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