For a given material at 3000 K, the transmissivity and reflectivity are as follows, O um<...
A small object with an opaque, diffuse surface at a temperature of 500 K is suspended in a large furnace with walls at 2000 K. Assume that the walls of the furnace provide a diffuse irradiation to the object at a blackbody temperature equal to the furnace wall temperature. The object’s surface has a spectral hemispherical emissivity and absorptivity as given below. (a) Determine the total emissivity and total absorptivity of the object’s surface. Partial Ans: ?=0.021 (b) Evaluate the...
The rigid body shown below rotates around a fixed axis at O and position angle 0= 0 when the body is in static equilibrium. Force f(t) is applied to the body as shown below. The mass of the body is 12 kg and O is the center of mass. k=1000 N/m_for the spring. Mass moment of inertia I and damping constant c are to be determined. The plot below shows the response 0(t) when f(t) = 60 N is a...
QUESTION9 Determine the specific volume (m-/k) for ammonia at T-173.45°C and P-86.3 bar using the Note: Give your answer to five decimal places generalized compressibility chart given below 1.00 B.00 6.008 Ty 5.00 3.00 00 4.0 2.00 0.90 1.60 ト080 602 A0.2.20 00 2. 1.80 1.60 -1.40 1.30 40 1.30 1.20 1.10 0.80 .0.85 1,20 0.90 ブ115. 0.70 1.00 1.10 0.90 0.95 0.80 0.60 0.70 0.50 00 0.40 0 30 00 0.1 02 0.3 0.4 0.5 Reduced pressure, pa 0.6...
Question No: 3 (a) A factory produces 2.5% of defective items.If a sample of 200 items is taken at random from the production. What is the probability that there will be at least four collision in a week? (2 Marks) 50,where t (b) The failure distribution function F(t) of a building system is given F(t) = 1-e is in years. Determine the following: (i) The system will last more than 6 years (ii) hazard function h(t) (3 Marks) (C) A...