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3 years ago

What are the maria composed of? Is this material found elsewhere in the solar system?

Physics

1 answer:

zepelin [54]3 years ago

6 0

Answer:

Basaltic Lava. It is very similar in composition to the basaltic lava on Earth.

Explanation:

Maria (Plural for Mare) are the huge dark plains on the Lunar surface. They were name as such as the ancient astronomer thought them to be sea (Latin meaning of mare is sea). As the astronomer's studied and observed Lunar surface further we got to know that these are not sea of water but huge plains filled with lava. These are easily visible to naked eye as dark spots on the Lunar surface.

These were formed due to ancient volcanic eruptions when the Moon was young. The study of these with Earth based observatories and Lunar missions have revealed a lot about the composition of these Lunar Maria. Major composition of them is Basaltic Lava very similar to that of Earth. They are iron rich which makes them less reflective in comparison to the highlands.

Elemental composition of the Lunar Maria is as follows:

1. Silica (SiO₂) - 45.4%

2. Alumina (Al₂O₃) - 14.9%

3. Iron Oxide (FeO) - 14.1%

4. Lime (CaO) - 11.8%

5. Magnesia (MgO) - 9.2%

6. Titanium Oxide (TiO₂) - 3.9%

7. Sodium Oxide (Na₂O) - 0.6%

The percentage of these elements is very similar to that on Earth.

The high percentage of Aluminum can be attributed to the replacement of Iron by anorthosites (which are mostly composed of plagioclase feldspar). Anorthosites replaced iron and magnesium in the continental areas.

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A motorcycle, which has an initial linear speed of 8.0 m/s, decelerates to a speed of 2.2 m/s in 4.1 s. Each wheel has a radius

SVETLANKA909090 [29]

Answer:

Explanation:

Given

Initial linear speed $v_1=8 m/s$

initial angular velocity $\omega _1=\frac{v_1}{r}=\frac{8}{0.6}=13.33 rad/s$

Speed after 4.1 s is $v_2=2.2 m/s$

$\omega _2=\frac{2.2}{0.6}=3.66 rad/s$

using $\omega _2=\omega _1+\alpha t$

where $\alpha$ is angular acceleration

$3.66=13.33+\alpha \cdot 4.1$

$\alpha =-2.37 rad/s^2$ i.e. clockwise

(b)angular displacement

$\theta =\omega _1t+\frac{\alpha t^2}{2}$

$\theta =13.33\times 4.1-\frac{2.37\cdot 4.1^2}{2}$

$\theta =54.66-19.75$

$\theta =34.91 rad$

3 0

4 years ago

Jerome is learning how the model of the atom has changed over time as new evidence was gathered. He has images of four models of

Yuki888 [10]

Answer:

Y, X, Z, W

Explanation:

Jerome must put the given models in the order Y, X, Z, W to display the development of atom from the earliest to the most recent one. 'Y' represents 'Thomson's plum pudding model' came in 1904 which was followed by the 'Rutherford's nuclear atomic model' of 1911 as represented by X. This was succeeded by the 'Bohr's electrostatic model' in 1913(as shown in model Z) and lastly, the model W which exemplifies the 'Quantum Mechanical Model' by Edwin Schordinger in 1926. Thus, the correct order is <u>Y, X, Z, W</u>.

6 0

3 years ago

Read 2 more answers

A ball is thrown horizontally from the top of a building and strikes the sidewalk after 2.8 s. How tall is the building? Neglect

Brut [27]

Answer:

h = 38.41 m

Explanation:

Given that,

A ball is thrown horizontally from the top of a building and strikes the sidewalk after 2.8 s.

We need to find the height of the building. Let it is h.

Initial speed of the ball, u = 0

Using second equation of motion to find h as follows :

$h=ut+\dfrac{1}{2}at^2\\\\\text{Put u = 0 and a = g}\\\\h=\dfrac{1}{2}gt^2\\\\=\dfrac{1}{2}\times 9.8\times 2.8^2\\\\=38.41\ m$

So, the building is 38.41 m tall.

3 0

3 years ago

A penguin slides at a constant velocity of 1.43 m/s down an icy incline. The incline slopes above the horizontal at an angle of

andrew11 [14]

Answer:

t =1.285 s

Explanation:

u=1.43 m/s

∅=6.47°

We know that μ(k)=tan∅

F(net)=-f(k)

ma =μ(k)*m*g

a =μ(k)*g equation 1

v=u+at

0=u+(μ(k)*g*t

Putting values

t=u/(g*tan∅)

t= $\frac{1.43}{9.81*tan(6.47)}$

t=1.285 s

7 0

3 years ago

How do the average temperature and the seasonal changes at the equator differ from those at the poles?

GarryVolchara [31]

Yeah 38dhdiichccudiidchcbc

3 0

3 years ago