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8_murik_8 [283]
3 years ago
12

From which of the following do most astronomers today think that the solar system formed?

Physics
2 answers:
4vir4ik [10]3 years ago
4 0

Answer: D. a nebula

Explanation:

Nebula is known as stellar nursery. It is composed of clouds of dust and gases from which stars are born. This cloud of dust and gases gravitates and shrinks to form a core of a star. When right temperature and pressure is reached, nuclear fusion kicks to produce heat and light which results in birth of a star. Astronomers think that solar system was formed from solar nebula. After the birth of the star, the rest of the material accreted to form the planets, asteroids and moons etc.

Rainbow [258]3 years ago
3 0
The answer is D.a nebula is what they say the solar system was formed 
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a) \%V = 87.36\,\%, b) x = 1.248\,m, c) F_{B} = 176488.341\,N, d) Six polar bears.

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\Sigma F =\rho_{w}\cdot g \cdot A \cdot x-\rho_{i}\cdot g\cdot V = 0

The height of the ice submerged is:

\rho_{w}\cdot A \cdot x = \rho_{i}\cdot V

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x = 1.248\,m

The percentage of the volume of the ice that is submerged is:

\%V = \frac{(1.248\,m)\cdot (14\,m^{2})}{20\,m^{3}} \times 100\,\%

\%V = 87.36\,\%

b) The height of the portion of the ice that is submerged is:

x = 1.248\,m

c) The buoyant force acting on the ice is:

F_{B} = \left(1030\,\frac{kg}{m^{3}} \right)\cdot (1.248\,m)\cdot (14\,m^{2})\cdot \left(9.807\,\frac{m}{s^{2}} \right)

F_{B} = 176488.341\,N

d) The new system is modelled after the Archimedes' Principle and Newton's Laws:

\Sigma F = -n\cdot m_{bear}\cdot g-\rho_{i}\cdot V \cdot g + \rho_{w}\cdot V\cdot g = 0

The number of polar bear is cleared in the equation:

n\cdot m_{bear} = (\rho_{w} - \rho_{i})\cdot V

n = \frac{(\rho_{w}-\rho_{i})\cdot V}{m_{bear}}

n = \frac{\left(1030\,\frac{kg}{m^{3}} - 900\,\frac{kg}{m^{3}} \right)\cdot (20\,m^{3})}{400\,kg}

n = 6.5

The maximum number of polar bears that slab could support is 6.

8 0
3 years ago
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