Please see the attached file for the fully formatted problem(s). 1. A heated copper wire 1 mm in diameter is in a pool of water at 1 atm. What is the maximum heat flux (q/A)? The temperature difference is related to the heat flux (q/A) by the following equation: [Equation] What temperature difference (which we'll cal
Explain what is meant by the concept of "residence time" as applied to combustors in jet engines.
When operating from a 230 V dc supply, a DC series motor operates at 900 rounds per minute with a line current of 75 Amps. Its armature-circuit resistance is 0.13 Ohms, and its series-field resistance is 0.09 Ohms. Due to saturation effects, the flux at an armature current of 25A is 45 percent of that at an armature current of
Consider a point source emitting 10^12 neutrons/s in a vacuum. Calculate the flux and the current at a distance of 1 m from the source.
Consider the space region bounded below by the right angled cone z=sqrt(x^2+y^2), and above by the sphere x^2+y^2+z^2=2. These two surfaces intersect in a horizontal circle, let T be the horizontal disk having this circle as boundary, S the spherical cap forming the upper surface, and U the cone forming the lower surface.
Find : Double of F*dS,over S, where F=(x*i+y*j+z*k)/(x^2+y^2+z^2) and where S is the surface of the infinite cylinder x^2+y^2=1; n pointing outward
Please refer to the attached file. It begins: A magnetic core with its dimensions is shown in the attached figure...
Let C be a differentiable curve contained in the portion 0 inferior or equal to x inferior or equal to 1 of the first quadrant, starting on the positive y-axis and ending somewhere on the line x=1. Show that the flux of the vector field F F=(2xy-2x^4*y)i+(4x+4x^3y^2-y^2)j across C is always equal to -2. Hint : App
A) Let C be the unit circle, oriented counterclockwise, and consider the vector field F=i+j. Which portions of C contribute positively to the flux of F? Which portions contribute negatively? b) Same questions with F=x^2*y*i+x*y^2*j
Question: Find the current I_N, required to establish a flux of 2 mWb in the air gap of the magnetic structure shown in the figure in the attached file. The structure is made of silicon sheet steel, and its magnetization curve is also shown. Assume that the coil has 500 turns, and the structure has the dimensions given in the at
SHOW ALL STEPS. Find the flux of F = xi + yj + zk across the surface S consisting of the triangular region of the plane 2x -2y + z = 2 that is cut out by the coordinate planes. Use an upward-pointing normal to orient S.
Dry air will break down and generate a spark if the electric field exceeds about 2.95 x 10^6 N/C. How much charge could be packed onto a green pea (diameter 0.830cm) before the pea spontaneously discharges?
See attached file for proper format. Consider a body of flowing water, such as a river. We can describe the flow of river water mathematically by a vector field that describes the water velocity v at every point in the river at an instant of time. Now imagine a small, flat surface submerged in the river. (If you want to visu
A tile in the horizontal xy plane has an area of 2.0cm^2. Assume that the circulation direction for its boundary is counter clockwise when viwed from above. What is the flux of the magnetic field through this tile in the vicinity of this tile, the magnetic field is approximately B=300 MN/C in a direction 37 degrees up from t
Question: Consider a generator constructed as shown in the attachment. The loop in this generator rotates at an angular rate of w. The slip rings in this design ensure that the same leg of the rotating loop is always connected to the same output terminal. Show that the potential difference between the output terminals is given b
(a) Let F(x,y,z)=(x^2+y-4)i + (3xy)j + (2xy+z^2)k. Evaluate the double integral over S of (curl(F). dS) where S is the surface x^2 + y^2 + z^2 = 16, z >=0 (I) Using Stroke's theorem (II)By direct evaluation (b) Find the flux of the vector field F(x,y,z) = (y-x)i + (x+y)j + y k across the side of the triangle with vert
Neglect end effects. The region between the conductors is air. Ke =1/4*pi*epsilon= 8.98755e9 N m^2/C^2. A coaxial cable has a charged inner conductor (with charge +4.8 microcoulombs and radius 1.199 mm) and a surrounding oppositely charged conductor (with charge -4.8 microcoulombs and radius 7.405 mm). a) What is the magn
Winding (stator and rotor), production of rotating flux and rotation of rotor.
The air conditioner in a car uses R-134a, and the compressor power input is 1.5 kW, bringing the R-134a from 201.7 kPa to 1200 Kpa by compression. The cold space is a heat exchanger that cools 30 degrees C atmospheric air from the outside down to 10 degrees C and blows it into the car. What is the mass flow rate of the R-134a an
Determine the magnetic flux density at the center of a solenoid of length 20 cm and diameter 50 cm if it is uniformly wound with 1200 turns of wire carrying a current of 3A?
A magnetic circuit consists of an iron core of a cross sectional area of 4cm^2 in which an air gap is cut in, where a flux density of 0.9T is required. There is a leakage factor of 1.2 and fringing increases the cross sectional area of the gap by 10%. What should be the flux density in the iron?