It is B, <span>In fact, water will sink as it cools until a certain point. If I recall correctly this is around 39 F. As the temp gets lower than that water actually begins to expand and becomes less dense. This is why ice floats, which we should all be thankful for. If ice didn't float than all water on earth would likely freeze solid and life would have probably never evolved past small single celled things.</span>
Answer:
- the first direct detection of gravitational waves came in 2015
- gravitational waves are predicted to travel through space at the speed of light
- the existence of gravitational waves is predicted by Einstein's general theory of relativity
Explanation:
The gravitational waves are waves that are produced by the objects, and depending on the mass of the object they can be stronger or weaker in their influence.
These waves have been in the minds of the scientists for more than a century now, with Einstein predicting them in his theory of relativity. The only problem with these waves was that there was no proof of them. The proof finally came in 2015 when these waves were detected from the first time, with two black holes to be thanked for that as they were the source of them.
These waves are predicted to be able to travel with the speed of light through space when they have small amplitudes.
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Answer: They are extra-high tides and extra-low tides.</h2>
Explanation:
Tides are periodic movements of the great masses of water on our planet as part of the gravitational attraction exerted by the moon and the sun on Earth.
In this sense, there are two very special cases: The Spring and Neap tides.
<u>Spring tides </u>
Occur when there is a full moon or new moon, which makes the <u>tides higher.</u> During these lunar phases, the Moon, the Earth and the Sun are aligned and the gravitational attraction power is greater.
<u>Neap tides </u>
Occur when the moon, the earth and the sun form a right angle (
), being the gravity attraction on the masses of water the minimum. This happens in the crescent and wanning phases.
The transhumance and the nomadic ranching may seem very similar, but they are not and they have one very big important difference between them. The transhumance ranching is the type of ranching where the ranchers are moving their livestock seasonally. That usually happens twice a year. The movement occurs when the season change. It is driven by the climate, and it can be when there's wet and dry season, or warm and cold season, and the movement can be vertical, from the mountains toward the lowlands and vice versa, or horizontal, toward places with more suitable weather conditions at that period. The The nomadic ranching, on the other side, is a type of ranching where the livestock is moved constantly, almost on a daily or weekly basis. This type of ranching is driven by the amount of food sources at a particular place. The nomads keep their livestock at a particular spot depending on how much food there is available, which usually is in low amount, so they are in constant movement for new grazing lands.
Answer:
federal government developed over time?
The federal government's power has INCREASED over time, particularly through the New Deal Programs during the Great Depression.
Explanation:
