When 241Am decays by emitting an alpha particle of kinetic energy 5.49 MeV, what is the recoil energy of the daughter nucleus?
A. 5.49 MeV
B. 1.27 MeV
C. 0.880 MeV
D. 0.0930 MeV
E. 0.0910 MeV
D. 0.0930 MeV
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A negatively charged particle is moving in the +x-direction when it enters a region with a uniform electric field pointing in the +x-direction. Which graph gives its position as a function of time correctly? (Its initial position is x = 0 at t = 0.)
a.
b.
c.
If the earth's electric field is 100 N/C downward, what must be the charge on a 1-kg object so that it would be "weightless"?
A) 9.8 C B) 0.22 C C) 1.0 C D) -9.8 × 10-2 C E) 9.8 × 10-2 C
What component is combined with the converging lens to construct a light microscope?
a. A focusing tool for the lens. b. A second, diverging, lens. c. A second, converging, lens. d. A concave mirror. e. A convex mirror.
In general, how does the size and location of a star's habitable zone depend on the star's mass?
A) the smaller (less massive) the star, the smaller and the closer-in the habitable zone B) the smaller (less massive) the star, the larger and the closer-in the habitable zone C) the smaller (less massive) the star, the larger and the farther-out the habitable zone D) The habitable zone is always about the same size, but its location moves inward for smaller stars.