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A motor-generator set is designed with steady-state operating speed between 2000 and 4000 rpm. Unfortunately, due to an imbalance in the machine, a large violent vibration occurs at around 3000 rpm.
An initial absorber design is implemented with a mass of 2 kg tuned to 3000 rpm. This, however, causes the combined system natural frequencies to occur at 2500 and 3500 rpm.
Redesign the absorber so that ω1 6 2000 rpm and ω2 7 4000 rpm, rendering the system safe for operation.
Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
the temperature profile at a location in water flowing over a flat surface is -800y experimentally measure to be tdegc
A 90 kg pilot ejects from a plane and reaches a steady state velocity of 30 m/s with one parachute open. Neglect any air drag force on the pilot and assume that the air drag force can be modeled as an ideal damper i.e. linearly proportional to the ve..
Calculate the heat loss. Assume the habitat is 10m in diameter. The distance from the center of the habitat to the Martian surface is 6m in diameter. An aerogel is put on the surface above the habitat acting as insulation.
Compare and contrast the heat capacity pcp of common brick, plain carbon steel, engine oil, water, and soil. Which material provides the greatest amount of thermal energy storage per unit volume? Which material would you expect to have the lowest ..
If the motorcycle has a deceleration of a_t = -(0.001s);{rm m}/{rm s}^{ 2 } and its speed at position A is 18 m/s, determine the magnitude of its acceleration when it passes point B.
What is the evaporation rate of water from the cylinder per unit length (kg/h · m)? What electrical power per unit length of the cylinder (W/m) is required to maintain steady-state conditions?
For any precipitation-hardened alloy, like an al-cu alloy, the strengthening of the alloy depends on the size and number of the precipitates. Calculate the cross-sectional area of a single 10-micron (10-5 m) diameter spherical precipitate. Determine ..
Use K-maps to determine an optimal equation for each output. Convert each equation to use, at most, one gate. Draw a circuit that implements each equation from part c.
a piston-cylinder device contains 0.8 kg of steam at 300degc and 1 mpa. steam is cooled at constant pressure until
a certain solar-energy collector produces a maximum temperature of 100ordmc. the energy is used in a cyclic heat engine
You are assigned to design a heating system for a swimming pool that is 2 m deep, 20 m long and 20 m wide. The client desires that the heating system be large enough to raise the water temperature from 2 C to 3C in 2 hours. The rate of heat loss from..
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