Answer:
Rate at which velocity changes with time.
Explanation:
This is interesting .. could you be more in detail ?
A star passes through stages of instability and stability. When core hydrogen fusion begins in a pre main sequence star, the star enters a stage of <u>stability</u>.
When the body has sufficient mass, the collapsing gas and dust burn hotter which eventually reaches temperatures enough to fuse hydrogen into helium. Thus, the star turns on and becomes a main sequence star, powered by hydrogen fusion.
A pre main sequence star is a star in the stage when it has not yet reached the main sequence. Earlier it is a protostar that grows by acquiring mass from its surrounding dust and gas.
Hence, in the pre main sequence star stage, core hydrogen fusion begins and the star enters a stage of stability.
To learn more about pre main sequence star here:
brainly.com/question/14094439
#SPJ4
The EU has created many different programs and actions, including:
1) Euro: The Euro is the currency shared by all members of the EU, and works in all European countries except for Britain (which uses the pound) and Western Russia.
2) Trade tariffs: All trade tariffs between the countries in the EU were lifted, and they essentially have 'free trade' within.
3) Unified response: Members of the EU work together, and may take action to help each other in case of situations, such as immigration, invasion, etc.
hope this helps
