1. What does the view factor represent? When is the view factor from a surface to itself not zero? 2. Consider two coaxial parallel circular disks of equal diameter D= 1 m spaced apart by 1 m, and two aligned parallel square plates (1 mx 1 m) are also spaced apart by 1 m. Determine the view factors Fu between the circular disks and the square plates. Which of the two geometries has the higher view factor value? D D 1 m 1 m 1m A₂ A₁ Im

For a hypothetical crystal structure, the {212} family of planes and <110> family of directions have the highest planar and linear densities, respectively. Determine all possible slip systems of the crystal structure.

2C.4 Falling-cylinder viscometer (see Fig. 2C.4). A falling-cylinder viscometer consists of a long vertical cylindrical container (radius R), capped at both ends, with a solid cylindrical slug (ra- dius KR). The slug is equipped with fins so that its axis is coincident with that of the tube. One can observe the rate of descent of the slug in the cylindrical container when the lat- ter is filled with fluid. Find an equation that gives the viscosity of the fluid in terms of the ter- minal velocity of the slug and the various geometric quantities shown in the figure. Cylindrical slug descends- with speed t -XR- Cylindrical container filled with fluid Fig. 2C.4 A falling-cylinder viscom- eter with a tightly fitting solid cylin- der moving vertically. The cylinder is usually equipped with fins to maintain centering within the tube. The fluid completely fills the tube, and the top and bottom are closed. (a) Show that the velocity distribution in the annular slit is given by (1-)-(1+¹) In…

Problem 3: A model equation for chemical reactive flow in a one-dimensional reactor is given as ac ac +u. ôt dx :DOC-KC, where C is the dimensionless concentration of the species, u is the velocity, D is a diffusion coefficient, k is a reaction rate, and x,t are the distance from the reactor and time, respectively. (3a) Determine the dimensions of D, k;

the question to be answered in 2 nd image

At 293 K Benzene flows through viscometer 1.8 times slower than acetone. What is the density ratio of acetone to benzene based on viscosity? Assume that viscosity of acetone at 293 K is the same as 298 K.

plz answer both 2 questions

radiation

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