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Session 10: Writing Exercise |
Reproduce the print page below in correctly formatted braille. This page is from "Astronomy" Fundamentals and Frontiers".
FILL IN THE BLANKS:
- A white dwarf is kept from collapsing by the incompressability of its ________. A similar role is played by the ________ in a neutron star.
- The radius of a white dwarf is about ________ miles; the radius of a neutron star is more like ________ miles.
- A star which is much more massive than the sun could probably end up as a(n) ________. Such an object would be distinguished by its high mass and copious emission of ________.
- It is probable that ________ are rapidly ________ neutron stars.
MULTIPLE CHOICE QUESTIONS:
- Physics predicts that
(a) matter or energy can never enter a black hole.
(b) nothing can stop the collapse of a black hole.
(c) black holes will "pop out" of our Universe and be undectable by any means.
(d) pulsars are black holes.
- The size of pulsars has been estimated primarily by their
(a) low luminosity.
(b) distance.
(c) location on the galactic plane.
(d) rapid variability.
- Pulsars typically fluctuate in brightness over a period of
(a) 1/10 second.
(b) 10 seconds.
(c) 10 minutes
(d) several hours.
- The following are ordered correctly with increasing size:
(a) Neutron star, black hole, white dwarf, sun, red giant.
(b) Black hole, neutron star, white dwarf, sun, red giant
(c) Neutron star, black hole, sun, white dwarf, red giant.
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