Answer:
earth plates move on top of the mantle like a RAFT floats on water
In a white dwarf, gravitational collapse is prevented by electron degeneracy pressure. this is a result of the pauli exclusion principle, which basically states that two electrons cannot occupy the same orbital/energy level at the same time.
Diffrent things could have happened to the other 4 kg
1 burnt up in the fire
2 turned to ash and blew away
The correct answer is letter D. Economy. Perestroika, as announced early in his years of leadership, was Gorbachev's policy to restructure the economy. At that moment, it's one of the crucial things to be taken care of.
