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A differential pressure system is used to measure the level of the liquid in a tank. The sensing line to the top of the tank is filled with cold water having a density of 990 kg/m3. When the level is at the bottom of the tank, the transducer reads -58.8 kPa (upper sensing line connection at a higher pressure than the lower sensing line connection). What is the level in the tank (relative to the tank bottom) when the transducer reads -10 kPa if the fluid in the tank has a density of 978 kg/m3?
A certain transmission line is 10 meters long. Measurements indicate that the total inductance of the cable is 16 H. Standing wave measurements indicate that the voltage reflection coefficient at the load is 0.5 + j0 when a 75 ohm resistor
A solar cell is uniformly illuminated by monochromatic light of 700nm with power density of 20 mW/cm^2. What is the corresponding incident photon flux What is the upper limit to Jsc if the bandgap is 1.4eV
An ideal p-n junction diode has saturation current Is = 3e-15 A. Calculate the diode current.
We can model the human body as a voltage source in series with a high resistance, let's say 10mV in series with 100kOhms. If we use an instrument with 1MOhm input resistance, what voltage value will we measure
Assume the coil around the toroid is one single coil and extends all the way around. A toroid is like a donut with a circular cross section. The following characteristics are given: Toroid material = sheet steel, N = 250 turns Inner Radius
draw a possible three phase motor that is based on two rotating electric fields and explain 1) the basic principle; 2) the drawback of the electric field based machine when it is compared to its counterpart in magnetic field based machines.
consider a 3λ/4 linear wire antenna which is fed at the center,find : i- the current distribution on the wire. ii- for the input current of .7 Amp, find the loop current (I0) , and the maximum radiated E at r = 1000 m
Construction on Hoover Dam was started in 1931 and finished in 1935, and the dam was in service from 1936. When completed, it was both the world's largest electric power producing facility and the world's largest concrete structure.
Given the surface charge density,ρs =2μ c/m2 , exsisting in region ρ=0.2m, z=0, find E at (a) PA(ρ=0, z=0.5); (b) PB(ρ=0, z=-0.5). Show that (c) the field along the z axis reduces to that of an infinite sheet charge at small values of z
Given the electric field of a 200 MHz uniform plane wave propagating in the z^ direction, where E is parallel to the y axis and reaches a peak value of 150 (mV/m) at t = 0 (s) and z = 0.5 (m).
Audio amplifiers use transformer coupling between the final amplifier stage and a speaker to match impedances and in order to avoid having DC current of the final stage flow through the speaker coil. We wish to connect an 8 Ω speaker to an 8000 Ω ..
A certain 100-watt light bulb costs 75 cents and lasts for 120 hours. Another longer-lived 100-watt light bulb costs $1.20. How much longer would the more expensive bulb have to last to make it a "good buy"
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