Answer:
Two objects with different masses collide and bounce back after an elastic collision.
Answer:
b. Interest-group
Explanation:
This group is the actual one due to the fact that, they all work towards actualizing a common goal and agenda of the said group. For example, if the agenda of the group was to see to the establishment of military arm of that countries forces in another smaller country, they will work towards that knowing fully well that, the group will benefit in one way or the other.
Answer:
people morality,honesty, civilization and cooperation increase the prestige of nation
Land, label, capitol, and entrepreneur
Explanation:

<em><u>Bitcoin is a digital currency which operates free of any central control or the oversight of banks or governments. Instead it relies on peer-to-peer software and cryptography. A public ledger records all bitcoin transactions and copies are held on servers around the world</u></em>