Which represents a correct match between ideas related to the formation of the universe? select the two correct answers.
a: greatest percent of mass of universe - dark matter
b: glowing nebula - dark energy
c: accelerating expansion - dark energy
d: structures forming in the early universe - dark matter

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

For which pair of objects would adding the same a