Chapter 9, Problem 9.12P

Computing Angles of Rotation and Angles of Tilt In each of the following problems, the axis of a hole is shown in a rectangular solid. In order to position the hole axis for drilling, the angle of rotation and the angle of tilt must be determined. Compute angles to the nearer minute in triangles with customary unit sides. Compute angles to the nearer hundredth degree in triangles with metric unit sides. a. Compute the angle of rotation, R. b. Compute the angle of tilt, T. 7. Given: H= 2.600 in. L = 2.400 in. a. W= 1.900 in. 8. Given: H= 55.00 mm b. Use this figure for #7 and #8. AXIS OF HOLE L 48.00 mm W= 30.00 mm H a. b. 9. Given: H = 4.750 in. L = 4.000 in. W= 3.750 in. a. 10. Given: H=42.00 mm b. L37.00 mm W = 32.00 mm a. b. 11. Given: H = 0.970 in. L = 0.860 in. W= 0.750 in. a. 12. Given: H= 22.00 mm L 18.00 mm = W = 15.00 mm a. b. Use this figure for #9 and #10. ZR AXIS OF HOLE Use this figure for #11 and #12. H b. L AXIS OF HOLE T

This is a tilt and rotation question. Here are notes attached for reference. I prefer handwritten solutions. ONLY UPLOAD A SOLUTION IF YOU ARE SURE ABOUT THE ANSWER PLEASE. I prefer handwritten solutions.

Consider a constant area semi-infinite fin of a circular cross section of radius r. and thermal conductivity k. The base is maintained at T. and the surface of the fin exchanges heat by convection to an ambient fluid at T with a heat transfer coefficient h. It is desired to increase the heat transfer from the fin. The following suggestions are made: (i) doubling k, (ii) doubling ro, (iii) doubling h. Which suggestion will bring about the largest increase in heat transfer? To x h, T C A h, T