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1. A 1/6-scale model of a torpedo is tested in a water tunnel to determine drag characteristics. What model velocity corresponds to a torpedo velocity of 20 knots? If the model resistance is 10 lb, what is the prototype resistance?
2. During the development of a 300-ft ship, it is desired to test a 10% scale model in a towing tank to determine the drag characteristics of the hull. Determine how the model is to be tested if the Froude number is to be duplicated.
An op amp with an open-loop gain of 6x10^5 and Vcc = 10V has an output voltage of 3V. If the voltage at the inverting input is -1 μV, what is the magnitude of the noninverting-input voltage
What is the height of the spectral line at zero frequency? How is this related to the DC level of the m-sequence?
A 15 hp, 209V,three-phase,six pole, Y-connected induction motor has the following parameter values per phase: R1= 0.128 ohm, R'2=0.0935 ohm Xeq- X1 + X'2 = 0.49 ohm. The motor slip at full load is 3%, and the efficiency id 90%.
Two 100 kg football players wearing regulation helmets collide helmet to helmet while each is moving directly at each other at 10.0 m/s and come to a near instantaneous ( 2 , and the helmets are each designed to provide a crumple zone of 0.025 m. ..
Suppose that we are located at the center (field-free region) of a very large, uniform, spherical cloud of positive charge. Show that what we consider to be negative charges may then be interpreted merely as holes in this cloud. What are then the ..
you have the task of ordering a replacement inductor for one that has become defective. The information on the nameplate has been painted over and cannnot be read. The machine that contains the inductor on 480V at a frequency of 60 Hz.
X & Y are Gaussian random variables with E[X]=1, E[Y]=2, E[XY]=.1, VAR[X]=5 & VAR[Y]=10. Define the vector V=(matrix) 1 1;1 -1 matrix X;Y. Find the mean of E[V], covariance martix for V, use matrix notation
A 100-L rigid tank contains nitrogen (N2) at 900 K, 6 MPa. The tank is now cooled to 100 K. What are the work and heat transfer for this process?
Resize the following unsigned binary numbers to 8 bits: 01101, 111000, 0001011001, 0011110000 and 000110001001. In which cases does the result not represent the same numeric value as the original number?
The total charge accumulated by a certain device is given by as a function of timeby q=18t2-2t4 ( in SI units). What is the max charge in the interval 0
A 50 hp, 460 V, three phase induction motor draws 61 amps when operating at rated voltage and at a power factor of 0.85 lagging when supplying a rated load. knowns: 1hp=746watts effeciency (n) = Pout/Pin = Pout/(Pout+losses)
A circular capacitor of radius r is made using SiO2 as the dielectric on a silicon wafer. If a trench of depth l is made to replace the circular capacitor with the trench capacitor with trench depth l, find the ratio of the two capacitances.
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