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aev [14]
3 years ago
15

Careful measurements reveal that a star maintains a steady apparent brightness at most times, except that at precise intervals o

f 73 hours the star becomes dimmer for about 2 hours. The most likely explanation is that:________.1. The star is cepheid variable.2. The star is a member of binary eclipsing star system.3. The star is peridically ejecting gas into space every 73 hours.4. The star is a white dwarf.
Social Studies
1 answer:
Veseljchak [2.6K]3 years ago
8 0

Answer:

2. The star is a member of binary eclipsing star system.

Explanation:

The question above shows an example of an eclipsing binary star. This type of star is very variable because the intensity of its brightness varies in the deccore of a few hours. This is because these stars are so close to an observer's field of view on the Earth's surface that they are easily eclipsed, and it is exactly these eclipses that cause the brightness of these stars to vary, which undergo a constant period of approximately 73 hours. intense shine, followed by constant drops in the intensity of that shine (lasts about 2 hours).

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Answer:

Explanation:

Assuming that this is referring to the same list of options that was posted before with this question, the correct response would be "a system of checks and balances", since this doesn't allow any branch to become too powerful.

8 0
2 years ago
According to John Maynard Keynes, a. the demand for money in a country is determined entirely by that nation’s central bank. b.
ryzh [129]

Answer:

d. the interest rate adjusts to balance the supply of, and demand for, money.

Explanation:

In Keynes's view, the interest rate is the premium that economic agents get for delaying the consumption that satisfies them. This is why people decide to save rather than consume. Thus, the consumer decides between present consumption or future consumption, depending on the attractiveness of the interest rate practiced in the market. In other words, the interest rate acts as the beacon between supply and demand for money. When the interest rate is attractive, savers forgo current consumption and save for extra income.

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3 years ago
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Bezzdna [24]

Answer:

Concrete operational

Explanation:

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One of the stages of this development is called the Concrete Operational stage and it takes place during the ages of 7 to 11. During this stage children start using logic as a way of thinking and start realizing how other people feel and view different situations (and therefore they are less egocentric).  One of the main milestones of this period is the development of the concept of conservation: They start understanding that when we take some liquid from a container and move it to a different container, the amount of liquid remains the same, for example.  

Therefore, it is in the Concrete Operational stages where a child would have just developed the ability to conserve.

7 0
3 years ago
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Rus_ich [418]
The answer would be Morrocco
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Dafna11 [192]

Answer:

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3 years ago
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