Question Solved1 Answer List three minerals in this lab that can scratch glass. What are three minerals in this lab that can scratch glass? feldspar quartz muscovite biotite clay minerals olivine amphibole pyroxene calcite biotite clay minerals olivine amphibole pyroxene calcite dolomite halite gypsum hematite pyrite magnetite talc Which two minerals in this lab fizz in hydrochloric acid? feldspar quartz muscovite biotite clay minerals olivine Camphibole pyroxene calcite dolomite halite gypsum amphibole O pyroxene calcite dolomite halite gypsum hematite O pyrite magnetite talc For each of these igneous rocks, indicate whether it cooled quickly or slowly. Granite quick cooling slow cooling Question 8 (1 point) Listen For each of these igneous rocks, indicate whether it cooled quickly or slowly. Diorite quick cooling slow cooling

A Variation of Gauss' Law In 1942, Boris Podolsky proposed a generalization of electrostatics that eliminates the divergence of the Coulomb field for a point charge. His theory retains \( \nabla \times \mathbf{E}=0 \) but replaces Gauss' law by \[ \left(1-a^{2} \nabla^{2}\right) \nabla \cdot \mathbf{E}=\rho / \epsilon_{0} . \] (a) Find the electric field predicted by this equation for a point charge at the origin by writing \( \mathbf{E}=-\nabla \varphi \) and integrating the equation over an infinitesimal spherical volume. It will be convenient at some point to write \[ \varphi(r)=\frac{q}{4 \pi \epsilon_{0} r} u(r) . \] (b) Suggest a physical meaning for the parameter \( a \).

undefined 19 If we multiply a complex number z = reis by ei', we get ei®z = re (6+0), that is, a complex number with the same r but with its angle increased by e. We can say that the vector r from the origin to the point z= x+iy has been rotated by angle e as in Figure 7.4 to become the vector R from the origin to the point Z = X +iY. Then we can write X +iY = ei®z = ei® (x + iy). Take real and imaginary parts of this equation to obtain equations (7.12).

7) Write Electrochemical equations for the oxidation and reduction processes which occur during: [10 marks]i. The corrosion of aluminium by air-free sulfuric acidii. Corrosion of iron in aerated sulfuric acid containing ferric sulphate iii. Corrosion of copper in aerated sulfuric acid containing ferric sulphateiv. Corrosion of nickel in seawater v. Corrosion of iron in air-free ferric chloride solutionvi. The uniform corrosion of a 50% iron-chromium alloy in aerated hydrochloric acid

Problem 4. For each of the following statements, determine if it is true or false. If it is true, explain why; if it is false, find a counter example. In the following, assume that i = Ax is an asymptotically stable continuous-time LTI system. = (a) The system i = -Ax is asymptotically stable. (b) The system i AT x is asymptotically stable. The system i = A-4x is asymptotically stable (assume A-1 exists). (d) The system i = (A + AT)x is asymptotically stable. (e) The system i = A x is asymptotically stable. In the following, assume that x[k+1] = Ax[k] is an asymptotically stable discrete-time LTI system. (f) The system x[k + 1) = -Ax[k] is asymptotically stable. (8) The system x[k + 1] = ATx[k] is asymptotically stable. (h) The system x[k + 1] = A-1x[k] is asymptotically stable (assume A-1 exists). (i) The system x[k + 1) = (A + AT)x[k] is asymptotically stable. (j) The system x[k + 1] = A2x[k] is asymptotically stable.

A sample of air at 101 kPa has a dry-bulb temperature of 25°C and a wet-bulb temperature 20°C. Calculate (a) the specific humidity ; (b) the partial pressure of water vapour Pu: (c) the relative humidity o: (d) the mass of dry air in 1 m' of mixture; (e) the dew point (1) If the mixture is cooled to 5 °C at constant pressure, determine the specific humidity in the final state. N.B. Do not use the psychrometric chart or the properties software for these calculations.

The aqueous decomposition of A is studied in an experimental CSTR. The results in the table below are obtained in steady-state runs. To obtain 75% conversion of reactant in a feed, C A0 = 0.8 mol/liter, what space time is needed in a plug flow reactor? Use a Levenspiel graph 4. The aqueous decomposition of A is studied in an experimental CSTR. The results in the table below are obtained in steady-state runs. Concentration ofA, mol/liter In Feed ime In Outlet 208 2.00 1.00 1.00 0.56 40 250 110 832 1.00 0.48 0.48 0.48 24 200 560 0.28 0.20 Based on the data of the table and using the Levenspiel graphical method, predict what space time would be needed to obtain 75% conversion in a plug flow reactor with a feed of initial concentration CA = 0.8 mol/liter