Cartridge brass can be extensively deformed into thin-walled sections because it does not _________-harden.
Fill in the blank(s) with the appropriate word(s).
strain or work
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Mass on a Spring: When a 0.350-kg package is attached to a vertical spring and lowered slowly, the spring stretches 12.0 cm. The package is now displaced from its equilibrium position and undergoes simple harmonic oscillations when released. What is the period of the oscillations?
A. 0.695 s B. 0.483 s C. 0.286 s D. 0.0769 s E. 1.44 s
Which of the following quantities are units of momentum? (There could be more than one correct choice.)
A) N ? m B) kg ? s/m C) kg ? m/s D) N ? s E) kg ? m2/s2
A ball is thrown with a velocity of 40 m/s at an angle of 30° above the horizontal and attains a certain range R. At what other angle will this ball attain the same range keeping its initial velocity the same?
A) 15° B) 90° C) 120° D) 60° E) All other angles will give different ranges.
Hot, low-density gas can be detected in galactic clusters through X-ray emission. The gas is important in understanding dark matter because ____
a. dark matter is responsible for heating the gas b. dark matter must make the cluster massive enough to hold on to the hot gas c. the gas may be the source of dark matter d. the gas is clumped in empty places between galaxies where there is more dark matter e. the gas is produced by dark matter