What else always happens when an electron is produced from energy in a particle accelerator?
A) The electron quickly becomes part of an atom.
B) The electron releases a tremendous amount of energy.
C) An antielectron (positron) is also produced.
D) The electron begins moving at extremely high speed.
C
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An uncharged metal sphere is placed on an insulating puck on a frictionless table. While being held parallel to the table, a rod with a charge q is brought close to the sphere, but does not touch it. As the rod is brought in, the sphere
a. remains at rest. b. moves toward the rod. c. moves away from the rod. d. moves perpendicular to the velocity vector of the rod. e. moves upward off the puck.
In a mass spectrometer, a single-charged particle has a speed of 1.00 × 106 m/s and enters a uniform magnetic field of 0.200 T at a right angle to the field. The radius of the resulting circular orbit is 20.75 cm
What is the mass of the particle? (e = 1.60 × 10-19 C) A) 6.64 × 10-27 kg B) 3.20 × 10-27 kg C) 1.67 × 10-27 kg D) 9.11 × 10-31 kg
According to our present theory of solar system formation, which of the following best explains why the solar nebula ended up with a disk shape as it collapsed?
A) The force of gravity pulled the material downward into a flat disk. B) The law of conservation of energy C) It was fairly flat to begin with, and retained this flat shape as it collapsed. D) It flattened as a natural consequence of collisions between particles in the nebula.
A 1000-turn toroid has a central radius of 4.2 cm and is carrying a current of 1.7 A. The magnitude of the magnetic field along the central radius is
A) 8.1 × 10-3 T. B) 5.1 × 10-2 T. C) 1.6 × 10-2 T. D) 8.1 × 10-2 T. E) 0.