Between the processes of nuclear fission and fusion, radioactive by-products are more characteristic of nuclear
A) fission.
B) fusion.
C) both of these
D) neither of these
Answer: A
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Calculate the kinetic energy (in eV) of a nonrelativistic neutron that has a de Broglie wavelength of 9.9 × 10-12 m. (h = 6.626 × 10-34 J ? s, mneutron = 1.675 × 10-27 kg, 1 eV = 1.60 10-19 J)
What will be an ideal response?
Long parallel wires separated by 7.5 cm carry 3.3 Amperes each in opposite directions
(a) What magnetic force per length acts on the wires? (b) Find the magnitude of the magnetic field midway between the wires.
Car A rear ends Car B, which has twice the mass of A, on an icy road at a speed low enough so that the collision is essentially elastic. Car B is stopped at a light when it is struck. Car A has mass m and speed v before the collision. After the collision
a. each car has half the momentum. b. car A stops and car B has momentum mv. c. car A stops and car B has momentum 2mv. d. the momentum of car B is four times as great in magnitude as that of car A. e. each car has half of the kinetic energy.
Photons from a source each have energy 3.30 eV. Photons from a second source have double the frequency of those from the first source. What is the energy of a photon from the second source?
A. 6.60 eV B. 13.2 eV C. 1.65 eV D. 0.825 eV E. 3.96 eV