Answer:
time taken for 25% Phlebotinum and 75% Dilithium is 168 million years
Explanation:
radioactive isotope of Phlebotinum decays into Dilithium.
time taken to half life takes = 42 million years
half life means that the Phlebotinum is 50% and Dilithium is also 50%
and now it is given that Phlebotinum is 25% and Dilithium is 75%
hence this condition will come after two half lives.
for one half life it takes 42 million years
and for second half life time becomes 4 times of first half life
time for 25% Phlebotinum and 75% Dilithium is = 4 × 42
= 168 million years.
hence time taken for 25% Phlebotinum and 75% Dilithium is 168 million years
Answer:
The celestial entities are roaming around the free space, as the different planets has a level of gravity which it imposes on other free roaming objects inside the solar system or more over inside the universe.
- As these celestial entities hold greater significance in shaping the whole system having a number of the planets and stars. The asteroids are considered as the belt of rocks or the large entities having masses equivalent to mountains.
- While, some of these celestial entities lose there track and get lost out of there normal track inside the solar system. The pull of gravity pushes these celestial entities to come closer towards the planets.However, in the past there were a number of asteroids which caused some of the most catastrophic events that we ever know.
- The asteroids are required to be avoided by any habitable place inside the universe but however lets say, we have an asteroid coming closer towards itself which will result in the catastrophic events on the target planet.
- But, lets say that an asteroid is faced by the planet in a more specific direction then the asteroid will have to act on a more specific target or point of collision to cause some of the catastrophic events on the planet's surface. As the living beings are greatly damaged by the impact of the asteroids.
- The point a which the center of mass, m of the planet is placed is considered to be the point at which the planet will feel more impact.
It is the birth rate because the other answers do not fit. Migration rate would be the rate at which people move to the country, meaning they weren't born there. Urbanization rate has to do with the movement of people to urban areas, which has nothing to do with birth. Death rate has to do with the death of people in a country which is the opposite of being born. Therefore, A is the only logical answer.
The seasons in Australia are the "opposite" of what happens in North America
So from June to August, when North America experiences summer, Australia experiences winter.
It experiences summer in December to February.
The change is graduate: so there are no such seasons around the equator at all.
Answer:
I'm pretty sure it's D but it might not be