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1 year ago

Why don't we see a lunar eclipse every time there is a full moon?

SAT

1 answer:

Vesnalui [34]1 year ago

7 0

A lunar eclipse happens when Earth is between the Sun and the Moon, which is a true statement about them.

When there is a lunar eclipse, the moon moves into a position where it will be in the Earth's shadow and will not be visible. This means that because the Earth sits between the sun and the moon, a shadow forms, and when the moon moves behind the Earth, the Earth prevents the moon from receiving light from the sun. If the eclipse is a total lunar eclipse, the Moon will spend roughly two hours traveling through the umbra (region of total shadow) cast by Earth. When the Moon merely passes through a portion of Earth's umbra or penumbra, a partial eclipse of the Moon occurs.

Learn more about Lunar eclipse here:

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In ΔUVW, u = 8.6 cm, v = 2 cm and w=7.7 cm. Find the measure of ∠V to the nearest 10th of a degree.

Goryan [66]

Answer:

12.6

Explanation:

delta math

5 0

2 years ago

The professor informs the class that there will be a test next week. what is the probability that a randomly selected student st

marusya05 [52]

The probability that students who were randomly selected studied for the test, if they pass it with a B or higher grade is: D. 0.80.

<h3>How to calculate the probability?</h3>

In this exercise, you're required to determine the probability that students who were randomly selected studied for the test, if they pass it with a B or higher grade. Thus, we would apply Bayes's theorem.

Let S represent studied for.

Let B represent a score of B or higher grade

Therefore, we need to find P(S|B):

$S|B = \frac{B|S \times S}{B|S \times S\; +\; B|S' \times S'} \\\\S|B = \frac{0.55 \times 0.6}{0.55 \times 0.6 \;+ \;0.2 \times 0.4}\\\\S|B =\frac{0.33}{0.33 + 0.08} \\\\S|B =\frac{0.33}{0.41}$

S|B = 0.80.

Read more on probability here: brainly.com/question/25870256

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<u>Complete Question:</u>

At the beginning of the semester, a professor tells students that if they study for the tests, then there is a 55% chance they will get a B or higher on the tests. If they do not study, there is a 20% chance that they will get a B or higher on the tests. The professor knows from prior surveys that 60% of students study for the tests. The probabilities are displayed in the tree diagram.

5 0

2 years ago

What are the three components of personality, and how does personality develop in relation to each?.

Mumz [18]

Answer:

He proposed three components to our personality: the id, ego, and superego. The job of the ego is to balance the sexual and aggressive drives of the id with the moral ideal of the superego. Freud also said that personality develops through a series of psychosexual stages.

3 0

2 years ago

In normal riding posture, the proper position for the elbows is:

Svet_ta [14]

Assuming the riding position pertains to biking, the best position for the elbows is bending them. In doing so, you would relieve some pressure on your elbows, wrists and hands. This could also help you absorb shock when passing over bumpy roads through your arms.

3 0

3 years ago

the distribution of lengths of salmon from a certain river is approximately normal with standard deviation 3.5 inches. if 10 per

juin [17]

Complete question;

<em>The distribution of lengths of salmon from a certain river is approximately normal with a standard deviation of 3.5 inches. If 10 percent of salmon are longer than 30 inches, which of the following is closest to the mean of the distribution? 26 inches A 28 inches B 30 inches C 33 inches D 34 inches</em>

Option B is correct. The value that is closest to the mean of the distribution is 30inches.

The formula for calculating the z-score is expressed as:

$z=\frac{ x-\mu}{\sigma}$

Given the following parameters

$\sigma = 3.5\\x = 26in$

If 10 percent of salmon are longer than 30 inches, then:

P(x>30) = 0.1

Using the z table to get the value corresponding to the mean area 0.1.

The required z-score will be -1.285

Substitute the resulting parameters into the formula to get the mean of the distribution.

$z=\frac{x-\mu}{\sigma}\\-1.285=\frac{26-\mu}{3.5}\\-1.285 \times 3.5 = 26 - \mu\\ -4.4975 = 26 - \mu\\\mu = 26 + 4.4975\\\mu = 30.4975\\\mu \approx 30in$

Hence the value that is closest to the mean of the distribution is 30inches.

Learn more here: brainly.com/question/15295437

3 0

2 years ago