Calculate the diffusion coefficient
The activation energy for the diffusion of atomic species A inmetal B is 125 kJ/mol. Calculate the diffusion coefficient at823°C, given that the value of D at 1200°C is 8.3× 10-12 m2/s.
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Calcium carbonate, the major component of limestone, isslightly soluble in water. Write an equilibrium equation showing the slight solubility of calcium carbonate in water.
Three particles are fixed on an x axis. Particle 1 of charge q1 is at x = -a and particle 2 of charge q2 is at x = +a. If their net electrostatic force on particle 3 of charge Q is to be zero, what must be the ratio q1/q2 when particle 3 is at a p
The force (weight) from a hanging sign attached at the outer tip of the top rail (P)? What will the tension be if a 50lb sign is hung at the tip of the bracket?
(a) how much farther west does the blue boat travel, compared to the green boat, and (b) how much farther south does the green boat travel, compared to the blue boat? Express your answers in km.
In a test of weight loss programs, 198 subjects were divided such that 33 subjects followed each of 6 diets. Each was weighed a year after starting the diet and the results are in the ANOVA table below. Use a 0.025 significance level to test the c
Write down the balanced chemical equation for one lbmol of ethane (b) Find the heat transfer in Btu per lbmol of ethane.
A rabbit runs in a straight line with a velocity of +1.6 m/s for a period of time, rests for 9 s, and then runs again along the same line at +0.55 m/s for an unknown amount of time. The rabbit travels a total distance of 1116 m, and its average sp
A typical automobile under hard braking loses speed at a rate of about 6.4 m/s2; the typical reaction time to engage the brakes is 0.48 s. A local school board sets the speed limit in a school zone such that all cars should be able to stop in 3.9
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