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Suppose it is known that a 5MHz transducer axis makes an angle of 30 degrees relative to the direction of motion of blood in a vessel. If the Doppler frequency is measured to be +500Hz, what is the velocity of the blood? Is it moving toward or away from the transducer?
At the end, the wave totally reflects with a pi phase shift, and the reflected wave now interferes with the incident wave to yield a standing wave pattern over the line length.a) Determine the standing wave pattern for the voltage in the line.
What are the incremental savings that result from increasing the efficiency of a PV collector by 1% in terms of collector area and costs? Assume that the PV module represents about 50% of the total PV system cost.
An engineering firm consisting of 3 programmers and 6 circuit engineers. The employees are randomly assign to 3 teams of 3, labeled Group 1, Group 2, and Group 3. a) How many ways are there to assign the 9 employees to Groups 1, 2 & 3
A delta-wye connected three-phase transformer is rated at 38 MVA with primary and secondary line voltage ratings of 345 and 125 kV, respectively. The transformer p.u. reactance is 10%, the p.u. no-load current is 0.1.
Write the VHDL assignment operator for the Y1 output of a BCD-to-binary encoder. Use Boolean operators, D0-D9 as the data inputs lines and Y0-Y2 for the outputs. Inputs and outputs are active-HIGH.
Design a 2-bit counter that, when f = 1, counts in the repeating sequence: 0, 2, 3, and when f = 0, counts in the reverse direction. Use T flip-flops. (a) Construct a state diagram or state table.
A 1000V, 50 hp compound motor runs at a speed of 750 rpm at full load. The armature, series and shunt field resistances are 0.5 ohm, 1 ohm, and 200 ohm, respectively. The motor efficiency at this condition is 80%. Calculate the motors starting cur..
The power supplied by a certain source is a constant 7.5 W over the first 5.8 min, zero for the next 2.8 min, a value that increases linearly from zero to 10 W during the next 8.8 min, and a value that decreases linearly from 10 W to zero
A parallel plate capacitor has gasoline as the dielectric. The area of the plate is 0.25 m^2 and the distance between two plates is 5cm. a. Find the capacitance given that the relative permittivity of gasoline is 2.
A current source of value 2cos(2t) A is used to power a string of 2W lightbulbs. If you wanted to replace this current source with a DC one, but have the same power drop, what DC current should you apply (one decimal place needed)
An AISI 4140 OQT 1000 sleeve is to be secured to a 2.50-inch diameter solid rod ot the same material employing a class FN1 force fit. The outside diameter of the sleeve is 5.00 inches.
g. What happened to all the power delivered to the resistors h. If the resistors are available with wattage ratings of 1/2 W, 1 W, 2 W, and 5 W, what minimum wattage rating can be used for each resistor
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