Consider a salient-role generator delivering power
through a short transmission line to an infinite bus V∞=1∠0°,
|Ea|=1.5. The active power delivered to the infinite bus is 0.7. We
are given the generator reactances Xd=1.6 and Xq=1.0 and the line
reactance XL=0.3. Neglect resistances, draw the phasor diagram and
find Ea and Ia.
In: Electrical Engineering
Describe evidence that supports boyles law, PV = constant for an
isothermal process. describe difficulties for exploring this
law
Describe evidence that supports gay-lussac's law, p/t = constant
for an isovolumeteric process. describe difficulties exploring this
law
Describe evidence that supoorts charle's law, v/t=constant for an
isobaric process. describe difficulties exploring this law
In: Physics
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Normal saline (0.9% w/v) solution has the same osmotic pressure as human blood. The solution is made by dissolving 0.9 g of NaCl in 100 mL of water. Calculate the osmostic pressure of a 0.9% saline solution at 37 oC (normal human body temperature.) (Hint: remember that NaCl dissociates into ions when it dissolves!) π = ___ atm |
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In: Chemistry
0.5 kg of R12 are contained in a piston/cylinder and has a quality of 75% and a temperature of 0 C. Heat is transferred at constant pressure until the R12 is a saturated vapor. Determine: a) the initial volume of the R12; b) the work done; c) the heat transfer; d) the T-v diagram.
Ans:
a) 0.0208 m3 b) 2.13 kJ c) 18.9 kJ
In: Mechanical Engineering
A closed rigid tank contains 2 kg of water at 80 C and
quality of 0.5815. The tank is then heated until it contains
only
saturated vapor. How much heat (in kJ) is added to reach this
condition? Include a drawing and plot the process on a P-V
diagram.
Organize the solution as
Given and drawing:
Assumptions:
First Law Analysis:
Solution:
PV diagram:
In: Physics
Question 1
A series RLC circuit has a capacitor with a capacitance of 36.0 ?F , an inductor with an inductance of 0.300 H and a resistor with a resistance of 65.0 ?. The circuit is attached to a source that has a rms voltage of 52.0 V and a frequency of 85.0 Hz. What is the peak current, the phase angle and the average power loss?
The Peak Current:
The Phase Angle:
The Average Power Loss:
In: Physics
Consider two-dimensional incompressible plane viscous flow between parallel plates a distance 2h apart, with the origin along the centerline. The plates are very wide and very long, so that the flow is essentially axial. The present case is where the upper plate moves at velocity V but there is no pressure gradient. Neglect gravity effects. Determine the velocity profile for this flow.
In: Mechanical Engineering
A simple harmonic oscillator consists of a block of mass 3.70 kg attached to a spring of spring constant 260 N/m. When t = 1.60 s, the position and velocity of the block are x = 0.199 m and v = 3.920 m/s. (a) What is the amplitude of the oscillations? What were the (b) position and (c) velocity of the block at t = 0 s?
In: Physics
A mass-spring oscillator consists of a 3.40-kg block attached to a spring of spring constant 103 N/m. At time t = 1.40 s, the position and the velocity of the block are x = 0.150 m and v = 3.18 m/s respectively. What is the amplitude of oscillation? What was the position of the block at t = 0? What was the speed of the block at t = 0?
In: Physics
6. Contrast the classical and Quantum-mechanical cases
for a delta-function potential bar-
rier, referring to the values of the transmission and reflection
coefficients in each case.
Make use of the table below. (6)
Case Classical Quantum-mechanical
E > Vmax (i) (iii)
E < Vmax (ii) (iv)
(v) What is R + T equal to? Explain.
[2
In: Physics