Engineering » Page 13

Engineering

Jenna Burke

Solve Problem 15.7 if all specified conditions remain the same but radiant energy exchange from glass to the surroundings at the air temperature is also considered.

Plate glass,

K = 1.35 W/m · K, initially at 850 K, is cooled by blowing air past both surfaces with an effective surface coefficient of 5 W/m

K. It is necessary, in order that the glass not crack, to limit the maximum temperature gradient in the glass to 15 K/cm during the cooling process. At the start of the cooling process, what is the lowest temperature of the cooling air that can be used?

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Engineering

Toby Robles

Which of these would be a likely speed of the wind in a jet stream?

A. 10 kilometers per hour

B. 300 kilometers per hour

C. 1,000 kilometers per hour

D. 30,000 kilometers per hour

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Engineering

Angeline Mcfarland

Cuando nació don quijote

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Engineering

Miranda Miller

Thermosetting polymers are polymers that becomes soft and pliable when heated. (True, False)

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Engineering

Nayeli Aguilar

A sludge pump pumps at a rate of 40 GPM. The raw sludge density is 4.5 percent solids. How many minutes per hour should the pump operate if the inflow to the clarifier is 1.8 MGD, the influent suspended solids are 210 mg/L, and the effluent suspended solids are 60 mg/L

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Engineering

Alvaro Santos

List the 6 steps used in the Buckingham Pi method

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Engineering

Callum Crane

Within a cubic unit cell, sketch the directions of [012], [721], [110].

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Engineering

Devon

Manufacturing is a method of converting raw materials into semi finished products. a) - True b) - False

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Engineering

Amirah Shaw

The vertical and horizontal poles at the traffic-light assembly are erected first. Determine the additional force and moment reactions at the base O caused by the addition of the three 86-lb traffic signals B, C, and D. Report your answers as a force magnitude and a moment magnitude.

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Engineering

Honey Pie

A household refrigerator with a COP of 1.2 removes heat from the refrigerated space at a rate of 60kJ/min. Determine: (a) The electric power consumed by the refrigerator, and (b) The rate of heat transfer to the kitchen air.

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Engineering

Adriel Duncan

python Write a program that prompts the user to enter the month and year and displays the number of days in the month. For example, if the user entered month 2 and year 2000, the program should display that February 2000 has 29 days. If the user entered month 3 and year 2005, the program should display that March 2005 has 31 days.

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Engineering

Aliana Diaz

The diameter of a cylinder is called the

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Engineering

Tucker

Calculate the fraction of atom sites that are vacant for lead at its melting temperature of 327°C (600 K). Assume an energy for vacancy formation of 0.55 eV/atom.

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Engineering

Molly Sanders

A certain robot can perform only 4 types of movement. It can move either up or down or left or right. These movements are represented by 'U', 'D', 'L', 'R'. Assume all these movements to be of unit distance. Write a function named theRoundTrip that takes all the movements the robot made in a day as input and output True of bool type if the robot returned to its starting position after its journey. Otherwise, return False. If the input is bad print the message "bad input".

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Engineering

Taniyah Campos

A mass of 1.3 kg of air at 120 kPa and 24°C is contained in a gas-tight, frictionless piston-cylinder device. The air is now compressed to a final pressure of 600 kPa. During the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. Calculate the magnitude of work input during this process.

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