Do you think it is possible that a carbon star could harbor an advanced civilization? Explain your reasoning
What will be an ideal response?
A carbon star is a very old low-mass star, after it has passed through the red giant phase. Earth may survive the red giant phase of the Sun, as planets in similar systems have, but. the cool red radiation may make processes such as photosynthesis difficult. Maybe an advanced civilization could have developed around this star, but it would have had to make special arrangements to survive the red giant phase of its mother star.
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Slanting Surfaces Without Friction: A slanted roof rises at 35° above the horizontal, and the straight-line distance from the top of the roof to the bottom edge is 4.5 m. The roof is covered with ice, so it offers no friction to objects sliding on it. A piece of ice at the top suddenly breaks loose and begins to slide down from rest.(a) How long will it take for the ice to reach the bottom edge of the roof?(b) How fast will the ice be traveling just as it reaches the bottom edge?
What will be an ideal response?
Which two factors determine a star's luminosity?
A) radius and surface temperature B) radius and distance from Earth C) surface temperature and distance from Earth D) mass and radius E) mass and surface temperature
Gaussian surfaces A and B enclose the same positive charge +Q. The area of Gaussian surface A is three times larger than that of Gaussian surface B
The electric flux through Gaussian surface A is A) three times larger than the flux of electric field through Gaussian surface B. B) three times smaller than the flux of electric field through Gaussian surface B. C) equal to the flux of electric field through Gaussian surface B. D) nine times larger than the flux of electric field through Gaussian surface B. E) unrelated to the flux of electric field through Gaussian surface B.
For an ohmic conductor, current is
a. directly proportional to voltage. b. directly proportional to resistance. c. independent of resistance. d. independent of voltage.