Some galaxies have regions that are relatively blue other regions appear redder what does this varuation indicate about the differences between these regions?

Which of the following correctly describes the early view of catastrophism?

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?