The prefix yotta (Y) signifies a multiple of 1024. How many yottameters are there in a gigameter?
What will be an ideal response?
10-15 ym
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Kepler based his theories on the precise planetary observations of Tycho Brahe
Indicate whether the statement is true or false
A point charge Q is placed on the x axis at the origin. An identical point charge is placed on the x axis at x = ?1.0 m and another at x = +1.0 m. If Q = 40 ?C, what is the magnitude of the electrostatic force on the charge at x = +1.0 m?
A. 29 N B. 14 N C. 11 N D. 18 N E. 7.0 N
Although neutron stars are very hot, they are faint and not easy to see at visual wavelengths because
a. light does not escape from their event horizon. b. most lie beyond dense dust clouds. c. they have only a small surface area from which to emit. d. the peak of their thermal emission is at much shorter wavelengths than visual. e. they have only a small surface area from which to emit and the peak of their thermal emission is at much shorter wavelengths than visual.
Pluto is classified as a dwarf planet because
A. it has not cleared its neighborhood. B. it is not spherical. C. it doesn't orbit the Sun. D. All of these choices are correct.