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Problem 3 (10 points) For a blackbody at 2250 K that is in air, find: (b) the hemispherical total emissive power (kW Im2). (c) the emissive power in the spectral range between o 2 and 8um. (d) the ra...
Problem 3 (15 points) A white ceramic surface has a hemispherical spectral emissivity distribution at 1600 K as shown....
Problem 3 (15 points) A white ceramic surface has a hemispherical spectral emissivity distribution at 1600 K as shown. What is the hemispherical total emissivity of the surface at this surface temperature? My guess is you need to do a numerical integration here. 1.0 0.8 0.6 E N 0.4 0.2 10 10 2 4 6 8 10 12 λ, μ
Problem 3 (15 points) A white ceramic surface has a hemispherical spectral emissivity distribution at 1600 K as shown. What...
A small object with an opaque, diffuse surface at a temperature of 500 K is suspended...
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...
Problem 2 (10 points) Find the emissivity at 400 K and the solar absorptivity of the diffuse material with the measured...
Problem 2 (10 points) Find the emissivity at 400 K and the solar absorptivity of the diffuse material with the measured spectral emissivity shown in the figure. 1.0 0.83 0.50 0.17 1.90 2.80 λ(μm)
Problem 2 (10 points) Find the emissivity at 400 K and the solar absorptivity of the diffuse material with the measured spectral emissivity shown in the figure.
1.0 0.83 0.50 0.17 1.90 2.80 λ(μm)
Problem 2: Now assume that a power of H = 3 kW is transmitted between the...
Problem 2: Now assume that a power of H = 3 kW is transmitted between the shafts and gears and the pressure angle of the bevel gears is ø= 20°. Then find: a) Contact forces between the helical and bevel gears b) Reaction forces at bearings C and D. Assume that the thrust forces are taken by the bearing D. m= 6, 32765 -16 m = 2. 12T. 23° F 38 mm) SXBja 540 rev/min 40T EI 27 35 50...
constant, find the power delivered to the wire 9-2 In the circuit on the right, find a. the equivalent resistance between points a and b b. the voltage across the 7 1-2 on resistor o c. the curren...
constant, find the power delivered to the wire 9-2 In the circuit on the right, find a. the equivalent resistance between points a and b b. the voltage across the 7 1-2 on resistor o c. the current in the 6 resistor d. the potential difference between points a and c, that is Ve-Va 3-n ㄟˋ 4o.oV
constant, find the power delivered to the wire 9-2 In the circuit on the right, find a. the equivalent resistance between points a...
Problem 4 (30 points) If D= (2y + 2)ax + 4.ryay + ra, C/m², find (a)...
Problem 4 (30 points) If D= (2y + 2)ax + 4.ryay + ra, C/m², find (a) (10 points) The volume charge density at (-1,0, 3) (b) (10 points) The flux through the cube defined by 0 <r <1,0 Sy<1,02<1 (c) (10 points) The total charge enclosed by the cube
5. Problem 3.54 (Textbook) (20 points) KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of...
5. Problem 3.54 (Textbook) (20 points) KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of rubberized sheath. Contact resistance between sheath and wire. Convection coefficient and ambient air temperature. Maximum allowable sheath temperature. FIND: Maximum allowable power dissipation per unit length of wire. Critical radius of insulation. SCHEMATIC: Air Wire Egen. D-2 mm Two Tini Tino To Ric = 3x10-4 m2-KW Insulation, t = 2 mm T= 20°C Ric Rcond conv k = 0.13 W/m-K Tmax = 50°C h...
6) (15 total points) For the root locus plot shown below: a) b) c) Find the...
6) (15 total points) For the root locus plot shown below: a) b) c) Find the open-loop transfer function G(s) (show as factors) (3 points) Assuming unity feedback H-1, find the characteristic equation of the closed loop transfer function (3 points). Find the gain K that the system goes unstable. Hint: express the characteristic equation in (a) as s2 + 2ơs + -0, and determine the point ơ becomes negative (6 points). Find the natural frequency of the closed loop...
2. Let A:(-1,1,-1), B:(2,0.2), C:(4.1.-3), and D:(-3, 1, 10) be points in R. (a) Find the...
2. Let A:(-1,1,-1), B:(2,0.2), C:(4.1.-3), and D:(-3, 1, 10) be points in R. (a) Find the angles (in degrees) of the triangle with vertices A, B and C. (b) Find an equation of the plane passing through the points A, B, and C. (c) Find two unit vectors perpendicular the plane through A, B, and C. (d) Find the volume of the tetrahedron with vertices A, B, C, D. 3. (a) Find an equation of the tangent line to the...
Problem 3 (8 points) (a)Find the natural response and the COMPLEX forced response (2 points). (b) And then write the general REAL solution of the given differential equation (2 points). (c)Rewrit...
Problem 3 (8 points) (a)Find the natural response and the COMPLEX forced response (2 points). (b) And then write the general REAL solution of the given differential equation (2 points). (c)Rewrite the forced response in POLAR form and sketch it on (y, t) AND on the PHASE (v, y) plane (3 points). (d) Sketch the solution of the INITIAL VALUE Problem y(0) 0, y (0) 0 using your sketches on both planes in part (c) (1 point) Use COMPLEX numbers!...
Problem 3 (15 points) A white ceramic surface has a hemispherical spectral emissivity distribution at 1600 K as shown. What is the hemispherical total emissivity of the surface at this surface temperature? My guess is you need to do a numerical integration here. 1.0 0.8 0.6 E N 0.4 0.2 10 10 2 4 6 8 10 12 λ, μ
Problem 3 (15 points) A white ceramic surface has a hemispherical spectral emissivity distribution at 1600 K as shown. What...
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...
Problem 2 (10 points) Find the emissivity at 400 K and the solar absorptivity of the diffuse material with the measured spectral emissivity shown in the figure. 1.0 0.83 0.50 0.17 1.90 2.80 λ(μm)
Problem 2 (10 points) Find the emissivity at 400 K and the solar absorptivity of the diffuse material with the measured spectral emissivity shown in the figure.
1.0 0.83 0.50 0.17 1.90 2.80 λ(μm)
Problem 2: Now assume that a power of H = 3 kW is transmitted between the shafts and gears and the pressure angle of the bevel gears is ø= 20°. Then find: a) Contact forces between the helical and bevel gears b) Reaction forces at bearings C and D. Assume that the thrust forces are taken by the bearing D. m= 6, 32765 -16 m = 2. 12T. 23° F 38 mm) SXBja 540 rev/min 40T EI 27 35 50...
constant, find the power delivered to the wire 9-2 In the circuit on the right, find a. the equivalent resistance between points a and b b. the voltage across the 7 1-2 on resistor o c. the current in the 6 resistor d. the potential difference between points a and c, that is Ve-Va 3-n ㄟˋ 4o.oV
constant, find the power delivered to the wire 9-2 In the circuit on the right, find a. the equivalent resistance between points a...
Problem 4 (30 points) If D= (2y + 2)ax + 4.ryay + ra, C/m², find (a) (10 points) The volume charge density at (-1,0, 3) (b) (10 points) The flux through the cube defined by 0 <r <1,0 Sy<1,02<1 (c) (10 points) The total charge enclosed by the cube
5. Problem 3.54 (Textbook) (20 points) KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of rubberized sheath. Contact resistance between sheath and wire. Convection coefficient and ambient air temperature. Maximum allowable sheath temperature. FIND: Maximum allowable power dissipation per unit length of wire. Critical radius of insulation. SCHEMATIC: Air Wire Egen. D-2 mm Two Tini Tino To Ric = 3x10-4 m2-KW Insulation, t = 2 mm T= 20°C Ric Rcond conv k = 0.13 W/m-K Tmax = 50°C h...
6) (15 total points) For the root locus plot shown below: a) b) c) Find the open-loop transfer function G(s) (show as factors) (3 points) Assuming unity feedback H-1, find the characteristic equation of the closed loop transfer function (3 points). Find the gain K that the system goes unstable. Hint: express the characteristic equation in (a) as s2 + 2ơs + -0, and determine the point ơ becomes negative (6 points). Find the natural frequency of the closed loop...
2. Let A:(-1,1,-1), B:(2,0.2), C:(4.1.-3), and D:(-3, 1, 10) be points in R. (a) Find the angles (in degrees) of the triangle with vertices A, B and C. (b) Find an equation of the plane passing through the points A, B, and C. (c) Find two unit vectors perpendicular the plane through A, B, and C. (d) Find the volume of the tetrahedron with vertices A, B, C, D. 3. (a) Find an equation of the tangent line to the...
Problem 3 (8 points) (a)Find the natural response and the COMPLEX forced response (2 points). (b) And then write the general REAL solution of the given differential equation (2 points). (c)Rewrite the forced response in POLAR form and sketch it on (y, t) AND on the PHASE (v, y) plane (3 points). (d) Sketch the solution of the INITIAL VALUE Problem y(0) 0, y (0) 0 using your sketches on both planes in part (c) (1 point) Use COMPLEX numbers!...
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