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monitta
2 years ago
9

19. A satellite goes along an elliptical path around earth. The rate of change of area swept by the line joining earth and the s

atellite is proportional to (a) r/2 (c)r3/2 (d) r2
Geography
1 answer:
grigory [225]2 years ago
4 0

Answer:

r^\frac{1}{2}

Explanation:

Angular momentum, L = m v r

areal velocity = \frac{dA}{dt}

according to kepler's 2nd law

\frac{dA}{dt}=\frac{L}{2m}

since, we know that

v=\sqrt{\frac{Gm}{r} }

areal velocity= \frac{mvr}{2m} = \frac{vr}{2}

now substituting value of v in areal velocity we get

\frac{1}{2}\sqrt{GMr}

hence from above equation of rate of change of area swept i.e. areal velocity is proportional to   r^\frac{1}{2}

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Describe the relationship between the level of service and the price of a hotel room?
dexar [7]

Answer:

The role of pricing on customer satisfaction has been largely ignored, however hospitality services are, for the most part produced by humans, and consequently, no two guest stays will be precisely alike.

However researches have been carried out suggesting that the variability in performance across different consumption experiences leads to increased uncertainty, and thus to decreased reliance on prior expectations, in such situation consumers tend to use price as a cue of performance expectations. Which makes it difficult to know customer satisfaction.

Meaning the relationship between the level of service and the price of hotel room is uncertain because know two human is alike.

Explanation:

4 0
2 years ago
The geocentric model, in all of its complexity, survived scientific scrutiny for almost 1400 years. However, in modern astronomy
Wittaler [7]

Answer:

The geocentric model appealed to mans' vanity, being in the center of everything. Simply, it satisfied their self-thought thus leaving no room for questioning its validity.

Explanation:

The geocentric and heliocentric models were the two main models proposed on how our solar system is laid out. Geocentric, coming from the word 'geo' meaning earth and 'centric' being center said that the Earth was the center of our solar system and the rest of the planets rotated and revolved around it. This model appealed to mans' vanity, this theory was promoted by Egyptian mathematician, Ptolemy. This theory was incorporated into religious dogma thus creating false credit. Ptolemy's calculations were correct, but his assumptions were not: the earth was motionless, circular orbits for planets, all celestial bodies orbit the earth etc. This was until Keppler and Galielo proved him wrong with his assumptions giving rise to the valid, Heliocentric model where the sun is the center of our solar system, planets have elliptical orbits and other planets had bodies orbiting them.

3 0
2 years ago
Adam, who is 5'6" tall, notices his shadow on the sidewalk. If the angle of elevation from the tip of the shadow to the sun is 6
german
<h2>Answer:</h2>

This problem can be solved using trigonomtry, assuming that the figure formed by Adam's shadow and Adam himself is a Right Triangle (as shown in the figure attached).


According to this,  the distance from the tip of the shadow to the top of Adam's head is the hypotenuse H of the triangle, and we already know Adam's height and the angle of elevation. So, the trigonometric function that best works in this case is sine:


sen(angle)=\frac{Oppositeleg}{hypotenuse}  


Where the opposite leg is the side of the triangle that is opposite to the 60\º angle.

In this especific case:


sen(60\º)=\frac{5.6feet}{H}     (1)


In order to know the value of the hypotenuse we have to find  H from equation (1):

H=\frac{5.6feet}{sen(60\º)}



H=6.4663 feet



Rounding:

H=6.46 feet>>>>>This is the distance from the tip of the shadow to the top of Adam's head



8 0
2 years ago
Read 2 more answers
Cartographers can represent the spherical Earth on flat paper by making a(n)
zimovet [89]

Cartographers can represent the spherical Earth on flat paper by making a projection which is like casting shadows from the spherical world onto a flat piece of paper

<u>Explanation</u>:

Cartographers otherwise known as map makers who combine nature and science through an acquired skill called cartography, it could serve as an efficient form of communicative technique for acquiring information through the procession of data.

Cartographers use PROJECTION to represent the spherical earth on a flat paper, through this scientific method, one could say that this structure reshapes reality in the human eye. There are steps or ways in which one can achieve a representation of the spherical earth on flat paper but it can only be foreseen by the complementarity of PROJECTION.

5 0
2 years ago
1. What is the approximate elevation of Wonderland Lake? Explain your reasoning.
Alisiya [41]

Answer:

Explanation:

Ans 1) The approximate elevation of wonderland lake is about 5500 feet, because it lies in the vicinity of the ridge where peak are having contour values upto 6600 feet and the wonderland lake lies on the lower contour of near about 5500 feet.

Ans 2) The peak elevation of poorman hill is 6485 feet as it can easily seen in the map that the highest contour value us 6485 feet. Poorman hill is lying in this contour value.

Ans 3) It is clearly seen and observed from the map that the elevation of the poorman hill is about 6485 feet where as the elevation of the boulder creek present at the south of poorman hill is less than 6000 feet. Thus poorman hill has higher elevation as compared to bank of boulder creek.

7 0
2 years ago
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