For a specimen of 1020 steel with the stress-strain diagram shown in Figure 6.17, calculate the maximum load-carrying capacity for a standard tensile test specimen as shown in Figure 6.15a.
What will be an ideal response?
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How does Earth's varying distance from the Sun affect our seasons?
A) It doesn't; Earth's orbital distance plays no significant role in the seasons. B) It makes summer warmer in the Northern Hemisphere than in the Southern Hemisphere. C) It is responsible for the fact that the seasons are opposite in the Northern and Southern hemispheres. D) It causes the seasons to be more extreme than they would be if the Earth's distance from the Sun were always the same.
Which of the following is a contribution that Kepler made to astronomy?
A. He discovered his Three laws (of Planetary Motion). B. He discovered four moons (or satellites) of Jupiter. C. He discovered epicycles. D. He determined the size of Earth.
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 486.1 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 485.9 nm
What can we conclude? A) The star is moving toward us. B) The star is moving away from us. C) The star is getting hotter. D) The star is getting colder. E) The "star" actually is a planet.
Planetary rings are found around
A) all of the planets B) the planet Saturn only C) all of the Jovian planets D) all of the terrestrial planets