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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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Engineering

What skills are key to reading comprehension?

Ability to pronounce words and understand usage within a sentence

Ability to recognize words and understand vocabulary

Ability to recognize grammatical parts of speech and the impact on sentence structure

Ability to identify text structure and form complete sentences

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Engineering

Why ceiling fan rotating anticlokwise and tabe fan rotate clockwise

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Jaylin Thornton

Engineering

36. Technician A says that whenever drum brake shoes are being replaced, the drum brake

hardware should be cleaned in a parts washer and re-used. Technician B says that when installing

duo-servo brakes, the larger of the two shoes should be installed towards the front of the vehicle.

Who is correct?

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Engineering

A 4.60 L vessel contains 24.5 g of PCl3 and 3.00 g of O2 at 15.0 ⁰C. The vessel is heated to 195 ⁰C, and the contents react to give POCl3. What is the final pressure in the vessel, assuming that the reaction goes to completion and that all reactants and products are in the gas phase?

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