The following test data apply to a 110 kVA, 2300 V three-phase four-pole 60 Hz induction motor.

No load test at rated voltage and frequency: Load current = 8.1 A, Three-phase power = 3025 W

Blocked-rotor test at rated current and 15 Hz: Line voltage = 268 V, Three-phase power = 10.2 kW

Stator resistance between line terminals = 2.34 Ω.

Compute the stator current and power factor, kW output, and efficiency when this motor is operating at rated voltage and frequency with a slip of 2.8 percent.

A 1.5 KVA, 220/120 V, 60Hz real step-down transformer has the following parameters that are all referred to the primary-side: the total copper loss R = 2.4 Ω, the core loss Rc = 2.4 KΩ, the magnetization reactance Xm = 2 KΩ, and all the leakages are negligible. Suppose that the output port in the secondary-side is operated at full-load and rated voltage with the unity power factor p.f. = 1.

(a) Find the power factor p.f.1 at the primary-side input port;

(b) What is the voltage regulation (V R)?

(c) Determine the power efficiency η .

Two isolated, concentric, conducting spherical shells have radii R1 = 0.470 m and R2 = 1.00 m, uniform charges q1 = +1.50 μC and q2 = +2.00 μC, and negligible thicknesses. What is the magnitude of the electric field E at radial distance (a) r = 4.70 m, (b) r = 0.610 m, and (c) r = 0.220 m? With V = 0 at infinity, what is V at (d) r = 4.70 m, (e) r = 1.00 m, (f) r = 0.610 m, (g) r = 0.470 m, (h) r = 0.220 m, and (i) r = 0?

Given vector s = [4, -5, 7], u = [-6, 8, 11], and v = [-5, 3, -7]
a. Let r1(t) be the vector equation through s and u. Express the vector equation r(t) in two ways and then find r(1); r(-5); r(9)
b. Let r2(t) be the vector equation through u and parallel to r1(t), Express r2(t) in two forms and then find r(-3); r(13); r(2)
c. Let w = 2s -4v, find r(t) through u and v

Humid air at 70.0 °C and 1.00 atm with 2.00 °C of superheat is fed to a condenser. Gas and liquid streams leave the condenser in equilibrium at 15.0 °C and 1.00 atm.

Use material balances to determine the following quantities for a basis of 100.0 mol of warm, humid air fed to the condenser.

Two isolated, concentric, conducting spherical shells have radii R₁ = 0.450 m and R₂ = 1.50 m, uniform charges q₁ = +1.70 μC and q₂ = +2.30 μC, and negligible thicknesses. What is the magnitude of the electric field E at radial distance (a) r = 3.40 m, (b) r = 0.840 m, and (c) r = 0.360 m? With V = 0 at infinity, what is V at (d) r = 3.40 m, (e) r = 1.50 m, (f) r = 0.840 m, (g) r = 0.450 m, (h) r = 0.360 m, and (i) r = 0?

There have been a lot of sci-fi shows recently using the "rotating space station" explanation for gravity on space stations.

After watching these videos:

http://www.youtube.com/watch?v=49JwbrXcPjc&NR=1
http://www.youtube.com/watch?v=_36MiCUS1ro

I was wondering what would happen, if you were facing the direction of rotation, while standing on the "floor" of a rotating space station and tossed a ball "up". From the video it looks like the ball should land in front of you. Is this in fact what would happen and if you dropped a ball would it land behind you?

1) For the following Business Cycle Phases listed (Provide objectives and at least two deliverables from each phase)

• Initiation Phase: Make the business case for the project. Work also begins on the user experience and on architectural proof of concepts.

• Discovery Phase: Conduct investigation leading to an understanding of the solution’s desired behavior

• Construction Phase: Complete the analysis and design, code, integrate, and test the software

• Final V & V Phase : Perform final testing before the product or service is transitioned into production

• Closeout Phase: Manage and coordinate deployment into production and close the IT project.

SUBJECT : MODERN PROJECT MANAGEMENT

you jump from a 20 meter tall building to a 12 meter tall building you jump horozontally with a speed of 5.0 m/s.

all must be answered using ther following equations v = dx/dt;   a = dv/dt;    v = v₀ + at;    x = x₀ + v_ot + at²/2;    v² = v_o² + 2aD

how long in seconds are you in the air?

how far apart are the two buildings assuming you jumped from the edge and landed on the edge?

what is your speed when you land?

for this question you must use the pythagrium therm