When the length of a simple pendulum is tripled, the time for one complete vibration increases by a factor of
A) 9.
B) 1/9.
C) 3.
D) 1/3.
E) .
E
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The ____________________ describes blazars, Type 1 Seyferts, Type 2 Seyferts, and radio lobe galaxies as being produced by a dense disk of gas and a hot accretion disk around a super massive black hole at the core of a galaxy
Fill in the blank(s) with correct word
A star is observed with a surface temperature of 3,000 K and a luminosity of 105 solar. What is the approximate radius of this star?
A) 30 Msun B) 0.3 Msun C) 3 Msun D) The radius cannot be determined.
Europa is one of the most promising of the bodies in the outer solar system for life in its salty seas
Indicate whether the statement is true or false
In the riddle, what is meant by light leaving its trap?
A: Light travelled much slower than the speed of light after the time of nucleosynthesis. B: Light was stuck to the matter concentrations by the force of gluons. C: Black holes prevented light from escaping in the early universe until after recombination. D: The universe was opaque until atoms formed and radiation could travel freely through space. E: The electromagnetic force held light in its place since light has an opposite charge to matter.