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Engineering

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

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Engineering

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

How does Cesca show that she has learned these lessons?

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Felicity Benson

Engineering

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

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

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

How long does a car battery last?

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Engineering

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

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

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Engineering

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

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

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

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

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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Engineering

Fluid originally flows through a tube at a rate of 100 cm^3/s. To illustrate the sensitivity of the Poiseuille flow rate to various factors, calculate the new flow rate for the following changes with all other factors remaining the same as in the original conditions:

a. Another tube is used with a radius 0.100 times the original.

b. Pressure difference increases by a factor of 1.60.

c. A new fluid with 3.00 times greater viscosity is substituted.

d. The tube is replaced by one having 4.00 times the length.

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