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Engineering

A ball bearing has been selected with the bore size specified in the catalog as 35.000 mm to 35.020 mm. Specify appropriate minimum and maximum shaft diameters to provide a locational interference fit.

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Engineering

Milk has a density of as much as 64.6 lb/ft3. What is the gage pressure at the bottom of the straw 6.1 inches deep in the milk? Give your answer in units of psi. (Do not put units in the blank.)

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Liliana Velazquez

Engineering

What is the main role of matrix in composites! a) - to transfer stress to the other phases b) - to protect phases from environment c) - to reduce the hardness d) - to enhance ductility

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Engineering

What is not required for current to flow through a conductor

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Engineering

The following sentence can be categorized as what stage in the Scientific Method: Abraham notices that Saharan desert ants will take great distances when looking for food, however once return from their journey they will take the shortest distance possible (straight line) to get back to their niche.

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Engineering

Q1. Basic calculation of the First law (2') (a) Suppose that 150 kJ of work are used to compress a spring, and that 25 kJ of heat are given off by the spring during this compression. What is the change in internal energy of the spring during the process? (b) Suppose that 100 kJ of work is done by a motor, but it also gives off 10 kJ of heat while carrying out this work. What is the change in internal energy of the motor during the process?

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Iliana Villegas

Engineering

What are the main renewable energy sources? Why are ocean, wave, and tidal energies not considered as main renewable sources?

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Engineering

What is the slow moving vehicle symbol?

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Engineering

Why do we care about a material's ability to resist torsional deformation?

(A) Because the angle of twist of a material is often used to predict its shear toughness

(B) Because rotating shafts are used in engineering applications

(C) We don't care - simply an academic exercise.

(D) Because it can determine G and inform us of a materials ability to resist shear deformation

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Engineering

An inventor claims to have developed a heat engine that produces work at 10 kW, while absorbing heat at 10 kW. Evaluate such a claim

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Engineering

Oil with a density of 850 kg/m3 and kinematic viscosity of 0.00062 m2/s is being discharged by an 8-mm-diameter, 42-m-long horizontal pipe from a storage tank open to the atmosphere. The height of the liquid level above the center of the pipe is 4 m. Disregarding the minor losses, determine the flow rate of oil through the pipe. Solve this problem by making the assumption that since the velocity through the pipe is so small, the pressure at the pipe entrance is nearly the same as the hydrostatic pressure at that location.

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Engineering

Consider the following schema:Suppliers (sid: integer, sname: varchar, address: varchar) Parts (pid: integer, pname: varchar, color: varchar) Catalog (sid: integer, pid: integer, cost: real) Where sid is the supplier's id (primary key in Suppliers), pid is the part's id (primary key in Parts), and sid together with pid is the primary key of Catalog. The Catalog relation lists the prices charged for parts by Suppliers. A) Write the following queries using relational algebra:5 Find the sids of suppliers who supply every part6. Find the sids of suppliers who supply every red part7. Find the sids of suppliers who supply every red or green part. 8. Find the sids of suppliers who supply every red part or supply every green part

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Engineering

A DC generator turns at 2000 rpm and has an output of 200 V. The armature constant is 0.5 V-min/Wb, and the field constant of the machine is 0.02 H. What is most nearly the field current produced by the generator? a) 4.0 A b) 10 A c) 1000 A d) 4000 A

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Engineering

What are the relative volume requirements for a CM reactor compared to a PF reactor if first-order kinetics apply and treatment efficiencies of 50%, 75%, 90%, 95%, and 99% are required?

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Engineering

A desktop computer is to be cooled by a fan whose flow rate is 0.34 m3 / min. Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m3. Also, if the average velocity of air is not to exceed 110 m/min, determine the diameter of the casing of the fan. (Page 215).

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