In a nuclear power reactor of the type used to generate electricity, a neutron bombards a uranium nucleus, causing it to split into two large pieces (fission fragments) plus two or three neutrons
Energy is released in this process in the form of electromagnetic radiation and kinetic energy. Which of the following is an accurate statement concerning what happens in such a fission process? A)
The electrical energy generated comes from the kinetic energy of the incident neutrons.
B)
The electrical energy generated comes from chemical energy stored in the electron bonds of the uranium atom.
C)
Electrical energy is generated because the fission fragments are electrically charged, whereas the uranium was electrically neutral.
D)
An intermediate step involves the fusion of protons to form helium nuclei, and energy is released in this process.
E)
The total mass of the particles after fission is less than the total mass of the particles (uranium nucleus plus one neutron) before fission, and this decrease in mass ?m is converted into energy E, where
E = ?mc2.
E
You might also like to view...
Why are Uranus and Neptune known as ice giants, rather than gas giants?
A. Their interiors may contain large quantities of water ice and other ices under tremendous pressure. B. Their interiors may contain liquid water and other materials that would be ices if not for the hot cores of those planets. C. Uranus and Neptune are much colder than Jupiter or Saturn. D. Uranus and Neptune are much smaller than Jupiter or Saturn. E. None of these choices are correct.
Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds its horn, which has a frequency of 540 Hz. What is the frequency heard by the driver of the lead car? (vsound = 340 m/s)
a. 463 Hz c. 579 Hz b. 540 Hz d. 500 Hz
A projectile that is fired vertically from the surface of Earth at 5 km/s will
A) go into circular about Earth. B) go into an elliptical orbit about Earth. C) rise and fall back to Earth's surface. D) none of the above
A silver wire has a cross sectional area A = 2.0 mm2. A total of 9.4 × 1018 electrons pass through the wire in 3.0 s. The conduction electron density in silver is 5.8 × 1028 electrons/m3 and e = 1.60 × 10-19 C
What is the drift velocity of these electrons? A) 2.7 × 10-5 m/s B) 9.1 × 10-5 m/s C) 5.2 × 10-5 m/s D) 1.1 × 10-5 m/s E) 7.4 × 10-5 m/s