Engineering » Page 5

Estrella Mcneil

Engineering

Old cars used to have a purely mechanical device called a carburetor to draw fuel into the engine for combustion. (Modern cars accomplish this with electronic fuel injection systems.) To prepare for this discussion, do some online research about how carburetors function.

1. How does the Bernoulli Effect allow the carburetor to function?

2. What advantages and disadvantages do you see with only using a carburetor?

3. Why do you think modern cars use electronic fuel injection systems instead of carburetors?

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Engineering

A 14 inch diameter pipe is decreased in diameter by 2 inches through a contraction. The pressure entering the contraction is 28 psi and a pressure drop of 2 psi occurs through the contraction if the upstream velocity is 4.0 ft/sec. What is the magnitude of the resultant force (lbs) needed to hold the pipe in place?

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Engineering

Answer if your name is russ

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Engineering

How should the system administrator resolve the issue?

A marketing user needs to create a new campaign, but the new button is NOT visible from the campaign home page. The system administrator has verified that the user has the "Create" profile permission for the campaign object.

A. Add the new button to the page layout using the page layout editor

B. Select the Marketing User checkbox in the user record

C. Grant the user "Read" profile permission for the campaign object

D. Select the "Manage Campaigns" profile permission

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Engineering

In response to the market revolution:the legal system worked with local governments to find better ways to regulate entrepreneurs. Chief Justice John Marshall ruled that legislatures could not alter or rescind charters and contracts that previous legislatures had created. local judges protected businessmen from paying property damages associated with factory construction and from workers seeking to unionize. Massachusetts Chief Justice Lemuel Shaw held in Commonwealth v. Hunt that workers had no right to organize. corporations proved less able to raise capital than chartered companies did.

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Engineering

A volume of 0.3 m3 of O2 at 200 K and 8 MPa is mixed with 0.5 m3 of N2 at the same temperature and pressure, forming a mixture at 200 K and 8 MPa. Determine the volume of the mixture, using (a) the ideal-gas equation of state, (b) Kay's rule, and (c) the compressibility chart and Amagat's law.

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Engineering

One kilogram of "as received" yard trimmings is made up of approximately 620 g moisture, 330 g of decomposable organic matter (represented by molar composition C1276H21 280 26Nosa) and 50 g of other non-biodegradable constituents. Calculate: (a) the moles of methane gas produced from one mole of decomposable organic matter, (b) the volume of methane gas (0.224 m / mole) from 1 kg of "as received" yard trimmings, and (c) energy (890 kJ/mole CH that could be produced from anaerobic decomposition of one kilogram of "as received" yard trimmings in a landfill. [Given: C, HONn H0 m CHs CO2 + d NH and m (4a + b-2c-3d) / 8]

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Engineering

A 5000-lb truck is being used to lift a 1000-lb boulder B that is on a 200-lb pallet A. Knowing that the truck starts from rest and that the horizontal force between the tires and the ground is 700 lb, determine the velocity of the boulder after the truck has moved forward 6 ft.

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Engineering

The fuel mixer in a natural gas burner mixes methane (CH4) with air to form a combustible mixture at the outlet.

Determine the mass flow rates at the two inlets needed to produce 0.5 kg/s of an ideal combustion mixture at the outlet. Use data from the tables.

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Engineering

A three-phase 25-kVA, 480-V, 60-Hz alternator, operating under balanced steady-state conditions, supplies a line current of 20 A per phase at a 0.8 lagging power factor and at rated voltage.

Determine the power triangle for this operating condition.

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Engineering

Given that the company "Slate Rock and Gravel" has business locations in Granitetown and Bedrock, suppose that the company has been assigned a large block of consecutive IP addresses starting with 192.172.0.0, and that it wishes to set up two subnets, one for each location, with each subnet having sufficient IP numbers assigned to cover the host computers at that location. The IP addresses must be assigned in this order: first to Granitetown, and then to Bedrock. Assume that there are 4,000 computers in Granitetown and 2,000 in Bedrock.

Your task is to assign IP address to the two locations. You must show your steps for each calculation.

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Engineering

Semiconductors are primarily used in? 1) electromechanical controls 2) electronic controls 3) pneumatic controls

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Engineering

It is well known that the thermal efficiency of heat engines increases as the temperature of the energy source increases. In an attempt to improve the efficiency of a power plant, somebody suggests transferring heat from the available energy source to a higher-temperature medium by a heat pump before energy is supplied to the power plant. What do you think of this suggestion? Explain.

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Deangelo Chambers

Engineering

Which one of the following is NOT a method of universal motor speed control? A. Tapped field windings with a switch selector B. Varying the voltage using semicoinductor devices C. Dynamic braking of the motor's shaft D. Using an adjustable centrifugal switch in parallel with a reistor

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Engineering

An adiabatic closed system is raised 100 m at a location where the gravitational acceleration is 9.8 m/s2. What Is the specific energy change of this system in kJ/kg?

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