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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.
If the pump is to produce the same head and discharge at a location where the atmospheric pressure is 12 psi, what is the necessary change in elevation of the pump relative to the inlet reservoir to avoid cavitation?
If the power factor is raised to unity, how many more kilowatts can alternator supply for the same kVA loading ?
Given that you want to transfer a 3MB song by sending packets across an Ethernet link that has a MTU. of 1500 Bytes, answer the following questions. (for this question use 1MB = 1024KB, 1KB=1024Bytes)
What is the attenuation per octave between 1 kHz and 10 kHz? What is the increase in attenuation between 5 kHz and 10 kHz?
What is the feedback factor. If a manufacturing error results in a reduction of A to 103, what close-loop gain results? What is the percentage change of Af corresponding to this factor of 100 reduction of A.
The process of stereophonic broadcasting was illustrated in Chapter 3. By comparing the noise power in the l(t)-r(t) channel to the noise power in the l(t)+ r(t) channel, explain why stereophonic broadcasting is more sensitive to noise than nonste..
An LTI system has an impulse response h(t) = e^(t) u(-t),where u(t) is the unit step signal. (a) Give a differential equation description for the system. (b)Suppose that an input signal is given as x(t) = e^(-t) u(t). Determine the output response.
1. Describe types of electrical hazard, their causes, the dangers and what can be done to prevent them. 2. Provide some guidelines, using the standards provided, on electrical hazards identified above.
Two batteries with emf's of 1.5V and 1.2V and internal resistances of 0.50-ohm and 0.80-ohm, respectively, are connected in parallel with + terminals together. a.) Determine the current they would deliver to an external resistance
For multiple frequencies what type of analysis must be performed. Discuss the advantages of transforming time-domain circuits into the corresponding frequency domain. How does this change the way circuits are analyzed
A certain automated data-logging instrument has 16K-words of on-board memory. The device samples the variable of interest once every five minutes. How often must data be downloaded and the memory cleared in order to avoid losing any dat
A water tank, 22 ft in diameter, is made from steel plates that are ½ in. thick. Find the maximum height to which the tank may be filled if the circumferential stress is limited to 6000 psi. The specific weight of water is 62.4 lb/ft.
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