Density: A compressed gas with a total mass of 107 kg is stored in a spherical container having a radius of 0.521 m. What is the density of the compressed gas?
A. 181 kg/m3
B. 110 kg/m3
C. 134 kg/m3
D. 161 kg/m3
Answer: A
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In which part of the electromagnetic spectrum does the sun emit the most intense radiation, i.e., in which part does the sun radiate the most energy?
A) radio B) gamma C) ultraviolet D) infrared E) visible
A double-convex lens is formed from a piece of plastic with an index of refraction of 1.70. The radius of the front surface has magnitude 20 cm, and the radius of the back surface has magnitude 30 cm. What is the focal length of this lens?
A) 86 cm B) -86 cm C) 43 cm D) -17 cm E) 17 cm
Astronomers who discovered quasars found that they show ___________ of their spectral lines and are thus probably much ___________ than nearby galaxies
a. large redshifts; farther away b. large blueshifts; farther away c. no wavelength difference; nearer d. large redshifts; nearer e. large blueshift; nearer
Determine the increase in the open spacing between precipitate particles that occurs when the 2014 aluminum alloy shown in Figure 7.17 is aged for 1000 h at 149°C (300°F), relative to the value at peak strength that is calculated in Example Problem 7.5. Assume that the as-quenched yield strength of 100 MPa is the value of ?0, that the lattice parameter of FCC aluminum is 0.404 nm, and that the shear modulus of this alloy is equal to that of aluminum given in Table 6.1.
What will be an ideal response?