All categories

4 years ago

According to the _____ model, the solar system formed from a cloud of dust and gas.

2 answers:

4 0

The correct answer to the question above is nebular. According to the NEBULAR model, the solar system formed from a cloud of dust and gas. Nebula model is a hypothesis in which tells you the origin (formation and evolution) of the solar system.

weqwewe [10]4 years ago

3 0

Answer:

According to the <u>NEBULAR</u> model, the solar system formed from a cloud of dust and gas.

Explanation:

According to Nebular model, the solar system was formed from molecular cloud of dust and gases. The material accreted and collapsed under its own weight. The rotating core gathered more mass increasing its temperature and pressure until nuclear fusion reaction started and Sun was born. The rest of the material flattened into disk from which planets were formed.

You might be interested in

Why surface tension of water is greater than methylated spirit?

Harrizon [31]

Surface tension is a property of a liquid to resist the external force. It is the result of cohesive forces between the molecules of the liquid.

The stronger the cohesive forces between the molecules of the liquid, the stronger is the surface tension.

Since methylated spirit has weaker cohesive forces than water, it will also have a weaker surface tension.

4 0

3 years ago

The model below shows a carbide ion. 8 light grey and 6 dark grey balls sit at the center with 2 concentric black rings around t

azamat

Answer:

This carbide ion change into a neutral carbon atom.

Explanation:

Given that,

Light grey balls = 8

dark grey balls = 6

medium grey balls = 2

Charge on dark grey ball = +1

Charge on light grey ball = 0

Charge on medium grey ball = -1

We need to change this carbide ion to a neutral carbon atom

Using given data

A dark grey ball has one positive charge. It means, it is a proton.

A light grey ball has has zero charge. It means, it is a neutron.

A medium grey ball has one negative charge.It means, it is a electron.

We know that,

The number of proton and number of electron is equal in a neutral atom.

So, No charge is present on the given model of atom.

Therefore, we can say that the atom is neutral.

We know that,

The sum of total number of protons presents in an atom it is called atomic number.

So, The total number of protons is 8, the total number of electrons is 8 and the total number of neutrons is 9 in given atom.

Hence, This carbide ion change into a neutral carbon atom.

6 0

4 years ago

In an experiment to measure the wavelength of light using a double slit, it is found that the fringes are too close together to

Mandarinka [93]

Answer:

halve the slit separation

Explanation:

As we know that

In YDS experiment, the equation of fringe width is as follows

$\beta = \frac{\lambda D}{d}$

where,

D denotes the separation in the middle of screen and slits

d denotes the distance in the middle of two slits

And to increase the Δx we have to decrease the d i.e, the distance between the two slits

Hence, the first option is correct

4 0

3 years ago

Fission and fusion reactions both involve making changes to an atom's _____.

spayn [35]

Option (A) is correct. Fission and fusion reactions both involve making changes to an atom's nuclei.

Nuclear fission is a process in which a bigger nucleus breaks into two or more smaller nuclei with the liberation of large amount of energy.

Nuclear fusion is a process in which two smaller nuclei fuse together to form a bigger nucleus. A tremendous amount of energy is released during fusion.

Thus both fission and fusion involve the changes in the nuclei of atoms. Rest of the atom like the electronic configuration etc remains same.

6 0

3 years ago

A 58.1 kg wood board is resting on very smooth ice in the middle of a frozen lake. A 48.3 kg boy stands at one end of the board.

VLD [36.1K]

Answer:

V = 1.41 m /s

Explanation:

Movement in both wood board and boy is created by internal forces . No horizontal external force acts on them . So conservation of momentum will apply on both of them for movement in horizontal direction.

Mass of wood board x velocity = mass of boy x velocity

58.1 x V = 48.3 x 1.69

V = 1.41 m /s

4 0

4 years ago