Which of the following deformation processes is best suited to producing a continuous strip with a C shape from metal that has a low strain-hardening rate?
(a) Rolling
(b) Extrusion
(c) Drawing
(d) Forging
(b) Extrusion
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A silicon monoxide (n = 1.45) film of 322-nm thickness is used to coat a glass camera lens (n = 1.56). What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10?9 m)
a. 467 nm b. 498 nm c. 623 nm d. 527 nm e. 736 nm
An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The mass of this object as measured by a stationary observer
A) approaches infinity. B) approaches zero. C) increases slightly. D) does not change.
Jill does twice as much work as Jack does and in half the time. Jill's power output is
A) the same as Jack's power output. B) one-fourth as much as Jack's power output. C) one-half as much as Jack's power output. D) twice Jack's power output. E) four times Jack's power output.
Which uranium isotope has the largest cross section for slow neutrons?
A) U-236 B) U-238 C) U-237 D) U-235 E) U-239