If the surface area of a sphere is increased by 16%, by what percentage has the radius been changed?
A. 16%
B. 8.1%
C. 7.7%
D. 12%
C. 7.7%
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An electron in a TV picture tube is accelerated through a potential difference of 10 kV before it hits the screen. What is the kinetic energy of the electron in electron volts? (1 eV = 1.6 × 10^?19 J)
a. 1.0E+4 eV b. 1.6E–18 eV c. 1.6E–11 eV d. 6.3E+22 eV e. 2.6E–15 eV
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?
The binding energy per nucleon of a nucleus
A) increases steadily as we go to heavier elements. B) is approximately constant throughout the periodic table, except for very light nuclei. C) has a maximum near iron in the periodic table and decreases after that for heavier elements. D) decreases steadily as we go to heavier elements. E) has a minimum near iron in the periodic table and increases after that for heavier elements.
You can increase the internal energy of a gas by heating it or by compressing it
Indicate whether the statement is true or false