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Engineering

6 years ago

Estimate the weight of a 25 km gas pipeline with a DN 600 mm, OD of 610 mm, and a wall thickness of 12.7 mm.

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Engineering

6 years ago

There are four distinct events that occur in the Carnot cycle. Name the events and describe each one.

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Engineering

6 years ago

Question 1

The value of shear stress which is induced in the shaft due to the applied couple varies

Oa from zero at the center to maximum t the circumference

Ob from maximum at the center to minimum at the circumference

Oc from minimum at the center to maximum at the circumference

Od from minimum at the center to maximum at the circumference

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Engineering

6 years ago

How does Cesca show that she has learned these lessons?

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Felicity Benson

Engineering

6 years ago

An empty metal can is heated to 908C and sealed. It is then placed in a room to cool to 208C. What is the pressure inside the can upon cooling? Assume that can contains air under ideal conditions.?

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Engineering

6 years ago

In determining liquid propellant performance a combination of A. High chemical energy & high molecular weight B. High chemical energy & low molecular weight C. Low chemical energy & low molecular weight D. Great taste & less filling

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Engineering

6 years ago

A 12-kN tensile load will be applied to a 50-m length of steel wire with E = 200 GPa. Determine the smallest diameter wire that can be used, knowing that the normal stress must not exceed 150 MPa and that the increase in length of the wire must not exceed 25 mm.

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Engineering

6 years ago

How long does a car battery last?

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Engineering

6 years ago

A structural component is fabricated from an alloy that has a plane-strain fracture toughness of 62 MPa√m. It has been determined that this component fails at a stress of 250 MPa when the maximum length of an internal crack is 1.6 mm. What is the maximum allowable internal crack length (in mm) without fracture for this same component exposed to a stress of 250 MPa and made from another alloy that has a plane strain fracture toughness of 40 MPa√m?

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Engineering

6 years ago

At what distance should the warning triangle be placed if a vehicle breaks down on the autobahn?

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Engineering

6 years ago

Your coworker was impressed with the efficiency you showed in the previous problem and would like to apply your methods to a project at a site with a sandy clay profile. Direct shear test results show a vertical pressure of 80 kPa and the shear stress at failure of 48 kPa. Present your recommendations to your coworker.

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Engineering

6 years ago

Estimate the time it would take for such axons to carry a message from a foot stepping on a sharp object to the brain and then back to the foot. This calculation gives a rough prediction of human reaction time.

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Engineering

6 years ago

If the wire has a diameter of 0.6 in., determine how much it stretches when a distributed load of w=100lb/ft acts on the beam. The wire remains elastic. Use Est=29.0 (103) ksi.

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Engineering

6 years ago

Now, after all of the ice melts, the sun shines for a while and the water column experiences heating at the surface. Would surface heating increase or decrease the stability of the water column? Explain.

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Engineering

6 years ago

A power cycle operating at steady state receives energy by heat transfer at a rate Q˙ H at TH = 1500 K and rejects energy by heat transfer to a cold reservoir at a rate Q˙ C at TC = 500 K. For each of the following cases, determine whether the cycle operates reversibly, irreversibly, or is impossible. If it is impossible, state why it is impossible. (a) Q˙ H = 550 kW, Q˙ C = 100 kW (b) Q˙ H = 500 kW, W˙ cyc = 200 kW, Q˙ C = 200 kW (c) W˙ cyc = 300 kW, Q˙ C = 150 kW (d) Q˙ H = 500 kW, Q˙ C = 200 kW

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