<span>The stars change position in the sky through the course of the night just like the sun changes position in the sky through the course of a day, they rise in the east and set in the west. If you were to start watching a star in the east at the beginning of the night and keep observing that same star for hours, you will see the star's position move across the sky and eventually drop below the western horizon. There some stars that don't rise and set through the night though. The stars near the celestial pole move in circles around the pole. There is one star in the sky that doesn't appear to move at all, because it is located in line with the Earth's axis of rotation, or in other words, on the celestial pole. This star is Polaris, or more commonly known as the North Star. The south celestial pole currently lacks a star so there is no southern hemisphere counterpart. In reality, Polaris isn't perfectly on the celestial pole so even it moves in a very small circle too small to be seen with the naked eye.</span>
Answer:
One example of checks and balances is that the president can veto any bill passed by Congress, but a two-thirds vote in Congress can override the veto.
Another example: The House of Representatives and the Senate both have to pass the same bill before it can become a law.
Answer:
more use of renewable and more eco friendly sources of energy like wind and solar power
Explanation:
https://www.eia.gov/energyexplained/us-energy-facts/
according to this graph from august 28th of 2019
3 different kinds of energy consumption
If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
