How does the discovery of a comet typically differ from that of an asteroid?
What will be an ideal response?
While both bodies are in motion, and thus noted as streaks on time exposure photos and CCD images, comets typically do not become visible until they approach the Sun and develop a coma, so their images are often fuzzy. Many amateur discoveries of comets depend on this fuzzy appearance in telescopes.
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Circular Motion of Charges: Alpha particles, each having a charge of +2e and a mass of 6.64 ×10-27 kg, are accelerated in a uniform 0.50 T magnetic field to a final orbit radius of 0.50 m. The field is perpendicular to the velocity of the particles. What is the kinetic energy of an alpha particle in the final orbit? (1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C)
A. 3.0 MeV B. 2.6 MeV C. 3.4 MeV D. 3.9 MeV E. 4.3 MeV
The maximum east or west longitude possible is also called the
a. meridian. b. longitude. c. International Date Line. d. equator.
Six pounds on Earth has what weight on the moon?
A) 1. kg B) 6. lb C) 36. lb D) 1. lb E) 1/6 lb
Radioactivity Basics: A radioactive isotope of atomic number Z emits an alpha particle, and the daughter nucleus then emits a beta-minus particle. What is the atomic number of the resulting nucleus?
A. Z - 1 B. Z + 1 C. Z - 2 D. Z - 3