A. seafloor spreading at mid-ocean ridges
Explanation:
Pulsar is also called as<u> neutron stars or white dwarfs.</u> These are formed after the supernova explosion. Their mass is higher than a normal star. And the most different thing we find in pulsar is that, in a pulsar the proton and electrons combine themselves to form a neutron. That's why this is also called as neutron star. After neutron or white dwarf the star goes to the black dwarf stage.
Remember when the core of the iron becomes iron rich that time it cannot sustain further nucleo synthesis process, that's why it goes for a supernova explosion. Which results the formation of neutron star or white dwarf, followed by black dwarf or black hole.
So if you think of a pyramid, the highest rank is on top, the order goes
1. Brahmins (highest rank or most respected) - priests, and the academic class
2. Kshatriyas - Rulers, administrators, and warriors
3. Vaishyas - artists, tradesmen, farmers, merchants
4. Shudras - commoners, peasants, servants
5. Dalits/outcastes/untouchables - street sweepers, latrine cleaners
Hope this helped a bit!
Answer:
True
Explanation:
The model of the universe developed by Nicolas Copernicus gave better predictions than the model of Ptolemy. The model of Ptolemy had prevailed for centuries, and it placed the Earth at the center of the universe. However, Copernicus accurately established that the sun was located at the center of the solar system. Moreover, Copernicus also established that the Earth is only one of many planets, that the Sun is stationary and that the Earth moves in three different ways (daily, annual, and annual tilting), among other astronomical principles.
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