(a) a steel ring of 300 mm and 200 mm external and internal diameters res solid steel shaft. the interference is arranged such that the radial pressure between the mating surfaces will not fall below 30 mn/m2 whilst the assembly rotates in service. if the maximum circumferential stress on the inner surface of the ring is limited to 240mn/m2, and there is no relative slip between the shaft and the ring, determine the maximum speed at which the assembly can be rotated. take density of steel, p 7470 kg/m', v 0.3, e- 208 gpa (9 marks). pectively is shrunk onto a (b) a 10 m hollow shaft with 60 mm and 30 mm external and internal diameters respectively, is subjected to a torque 1300 nm. with a modulus of rigidity of 90 gpa, determine () the polar second moment of area (u)(i) shear stress () and (ii) the angle of twist (0)

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

What substance has a mass of 9.5g and volume of 2.1cm^3

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.