At temperatures above 0.80 of the melting temperature and at very low stress, the primary mechanism of creep strain in metals is

(a) Cobel creep.
(b) Dislocation glide
(c) Dislocation creep
(d) Herring-Nabarro vacancy flux


(d) Herring-Nabarro vacancy flux

Physics & Space Science

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Power: Suppose you left five 100-W light bulbs burning in the basement for two weeks. If electricity costs 10.0¢/kW?h, (a) how much did the electricity cost (to the nearest dollar) to leave those bulbs on, and (b) how many joules of electrical energy did they consume?

What will be an ideal response?

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A car travels at a constant speed of 95.0 km/h around a circular track with a diameter of 1.00 km. What is the magnitude of the car's centripetal acceleration, and what supplies this?

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What is the longest wavelength of electromagnetic radiation that will eject photoelectrons from sodium metal for which the work function is 2.28 eV?

(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 580 nm B) 499 nm C) 633 nm D) 668 nm E) 545 nm

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Electric potential, measured in volts, is the ratio of electric energy to the amount of electric

A) current. B) resistance. C) charge. D) voltage. E) none of the above

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