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Engineering

How many atoms are centered on the [100] direction in a FCC unit cell

An approach to a signalized intersection has a saturation flow rate of 1800 veh/h. At the beginning of an effective red, there are 6 vehicles in queue and vehicles arrive at 900 veh/h. The signal has a 60-second cycle with 25 seconds of effective red. What isthe total vehicle delay after one cycle?

The speed of an aircraft is given to be 260 m/s in air. If the speed of sound at that location is 330 m/s, the flight of the aircraft is _____.

The velocity, c, at which pressure pulses travel through arteries (pulse-wave velocity) is a function of the artery diameter, D,and wall thickness, h, the density of blood, p, and the modulus of elasticity, E, of the arterial wall. Determine a set of nondimensional parameters that can be used to study experimentally the relationship between the pulse-wave velocity and the variables listed. Form the nondimensional parameters by inspection.

Assuming `qualified` is already declared, code a fall-through switch statement to print the following messages: When `qualified` is 1 or 2: "You are a student or teacher and you get a 10% discount." When `qualified` is 3 or 4: "You are a senior citizen or military and you get a 12% discount." For any other value of `qualified`: "Sorry, you're not eligible for a discount."

When it comes to making a good impression in a work setting, it does not apply to an initial contact, since both people are meeting for an express purpose. you have a 5 to 10 minute grace period before people form their impression of you. your handshake and facial expression dominate all other elements of your appearance. you have only seconds in which a person will accept or reject an employee or firm.

Liquid water enters a cooling tower operating at a steady state, with a temperature of 40ºC and a mass flow rate of 105 kg/h. Cooled water exits the cooling tower at 25ºC with the same mass flow rate. Makeup water is supplied at 23ºC. Atmospheric air enters the tower at 30ºC, 1 bar, and 35% relative humidity. A stream of saturated moist air exits at 34ºC and 1 bar. Determine: a. the mass flow rates of the dry air and makeup water, in kg/h. b. the rate of exergy destruction within the cooling tower, in kW, for T0 = 23ºC.

You are in charge of ordering the concrete for a basement wall concrete pour. The wall forms are all set up and ready. The wall around the basement is 10 inches thick. The interior finished dimension of the basement is 120 feet 5 inches by 86 feet 4-1/2 inches and fourteen (14') feet tall. What is the exact quantity of concrete in cubic yards (CY) to order plus three (3%) per cent added for spilled concrete.

1. _____________________ are the most important aspects of rope safety. A) Weight and measures B) Strength and leverage C) Care and maintenance D) Moisture and grease

A concentric tube heat exchanger for cooling lubricating oil is comprised of a thin-walled inner tube of 25 mm diameter carrying water and an outer tube of 45 mm diameter carrying the oil. The exchanger operates in counterflow with an overall heat transfer coefficient of 60W/m2K and the tabulated average properties given below. If the outlet temperature of the oil is 60oC, plot the temperature as a function of x and determine the total heat transfer, the outlet temperature of the water, and the required length.

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