Engineering » Page 26

Engineering

2 years ago

It is desired to produce and aligned carbon fiber-epoxy matrix composite having a longitudinal tensile strength of 800 MPa. Calculate (a) the critical fiber length (in mm), and (b) the volume fraction of fibers necessary if (1) the average fiber diameter is 0.017 mm, (2) the average fiber length is 2.3 mm, (3) the fiber fracture strength is 5500 MPa, (4) the fiber-matrix bond strength is 18 MPa, (5) the matrix stress at fiber failure is 13.5 MPa.

Answer Answers (1)

Engineering

2 years ago

Can a 1½ " conduit, with a total area of 2.04 square inches, be filled with wires that total 0.93 square inches if the maximum fill for that conduit is 40%?

Answer Answers (1)

Engineering

2 years ago

How do we define energy efficiency

Answer Answers (2)

Engineering

2 years ago

When shutting down your computer yesterday, you received a notice that you had a pending update, so you allowed the computer to update before shutting down. This morning when you turned your computer on, you received the error message, "OS not found." What is the first thing you should check or do when you receive this error message? a. SATA cable Tb. Power supply c. Hard drive d. Roll back the Windows update

Answer Answers (1)

Engineering

2 years ago

An electric heater draws 12 A from a 120 V power source. How much powe heater dissipate? (a) 10 W (b) 1200 W (c) 1440 W (d) 17,280 W

Answer Answers (1)

Finnegan Daniels

Engineering

2 years ago

What is System approach to maintenance?

Answer Answers (1)

Engineering

2 years ago

Short-term memoryA) has a larger storage capacity than long-term memory. B) takes longer to retrieve than long-term memory. C) involves transient modifications in the function of preexisting synapses, such as channel modification. D) two of these answers. E) all of these answers.

Answer Answers (1)

Engineering

2 years ago

What happens if your son makes a spark in a outlet and then the room goes dark

Answer Answers (1)

Engineering

2 years ago

Is CO, an air pollutant? How does it differ from other emissions resulting from the combustion of fossil fuels?

Answer Answers (1)

Engineering

2 years ago

7. A single-pole GFCI breaker is rated at

a. 120VAC

b. 240VAC

c. 120/240VAC

d. 240/480VAC

Answer Answers (1)

Engineering

2 years ago

Which of the following identifies the fields of study in which aerospace engineers specialize?

mechanics, chemistry, and physics

materials, mechanics, and biochemistry

thermodynamics, geology, and chemistry

acoustics, propulsion, and thermodynamics

Answer Answers (1)

Engineering

2 years ago

Determine the change in the enthalpy of helium, in kJ/kg, as it undergoes a change of state from 100 kPa and 20 oC to 600 kPa and 300 oC

Answer Answers (1)

Kristen Oconnor

Engineering

2 years ago

The composition of stainless steel is best described as an iron-carbon alloy with: Group of answer choices low carbon content, a little manganese and only residual amounts of other impurities. normally between 3.1 and 4.0 wt% carbon and some silicon. significant nickel. normally between 3.1 and 4.0 wt% carbon and some chromium. significant chromium.

Answer Answers (1)

Engineering

2 years ago

Micrometers with a vernier graduation are capable of taking readings to the nearest 0.0001 in. a) - True b) - false

Answer Answers (1)

Engineering

2 years ago

Twenty degree C air enters a tube bank which is to be used to remove 150 [kW] of heat from condensing refrigerant. The refrigerant is flowing inside the tubes of the bank and causes the external tube surfaces to be maintained at 100o C. The air is accelerated by a fan to 8 [m/s] upstream of the bank. The bank is to be constructed of transverse rows of fifty 8 [mm] O. D. tubes 0.75 [m] wide with the center-to-center transverse spacing equal to 15 [mm].

Calculate the exit temperature of the air from the bank

Answer Answers (1)

Menu

Calculator

Subjects