What makes dark energy "dark"? a. its unknown nature b. its completely black color c. its existence beyond the visible spectrum d. its inevitable creation of a totally destructive big crunch nucleosynthesis began when and ended when a. the big bang occurred; the big crunch occurred b. nuclear reactions could first occur; matter had condensed into galaxies and stars c. the cosmic microwave background radiation formed; dark energy replaced it as the dominant energy form d. the universe had cooled enough for atoms to combine; protons and neutrons were too far apart to form nuclei
Dark energy makes "dark" the answer is option A. its unknown nature.
Nucleosynthesis began when the answer is option D. the universe had cooled enough for atoms to combine an ended when the answer is option D. protons and neutrons were too far apart to form nuclei.
answered: Guest
it is called kinetic energy
answered: Guest
igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods
The atoms in a sidewalk on a hot summer day are vibrating the atoms in the sidewalk on a freezing day in winter. a. more rapidly than b. more slowly than c. at the same speed as