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GarryVolchara [31]
2 years ago
7

Which of the following is NOT a characteristic of noble gases?

Physics
2 answers:
Rudik [331]2 years ago
8 0
Solid at room temperature
matrenka [14]2 years ago
6 0
I think it’s Solid at room temperature
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Why would we expect protogalactic clouds with relatively high density to form an elliptical galaxy rather than a spiral galaxy?
Svetlanka [38]

The higher density allows the protogalactic clouds to cool faster and form an elliptical galaxy rather than a spiral galaxy.

In physical cosmology, a protogalaxy or protogalactic cloud , which could also be called a "primeval galaxy", is a cloud of gas which is forming into a galaxy. It is believed that the rate of star formation during this period of galactic evolution will determine whether a galaxy is a spiral or elliptical galaxy; a slower star formation tends to produce a spiral galaxy. The smaller clumps of gas in a protogalaxy form into stars.

Composition

Since there had been no previous star formation to create other elements, protogalaxies would have been made up almost entirely of hydrogen and helium. The hydrogen would bond to form H2 molecules, with some exceptions. This would change as star formation began and produced more elements through the process of nuclear fusion.

Mechanics

Once a protogalaxy begins to form, all particles bound by its gravity begin to free fall towards it. The time taken for this free-fall to conclude can be approximated using the free-fall equations. Most galaxies have completed this free-fall stage to become stable elliptical or disk galaxies, the disks taking longer to fully form. The formation of galaxy clusters takes much longer and is still in progress now.

This stage is also where galaxies acquire most of their angular momentum. A protogalaxy acquires this due to gravitational influence from neighbouring dense clumps in the early universe, and the further the gas is away from the centre, the more spin it gets.

Learn more about protogalactic clouds here : brainly.com/question/28166070

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7 0
1 year ago
Which apparatus is used to measure mass of a bread
Harrizon [31]

Explanation:

a triple beam balance can measure the mass of one slice of bread

3 0
2 years ago
What characteristic describes what happens during a physical change
Alex73 [517]
Physical change changes the form of a chemical substance
7 0
3 years ago
The classic Millikan oil-drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oi
Sati [7]

Answer:

1.56\times 10^5 N/C        

Explanation:

The electric field that will balance the weight of the oil drop can be calculated using the following:

electric force, F = e E ( where, e is the charge of an electron and E is the electric field)

weight, W = 2.5 ×10⁻¹⁴ N

e E = W

E =\frac{W}{e}

Substitute the values:

E =\frac{ 2.5 \times 10^{-14} N}{1.6\times10^{-19}C}= 1.56\times 10^5 N/C

6 0
2 years ago
Read 2 more answers
. Which of the following is a vector describing how fast an object moves over a long time interval?. . average speed. instantane
gulaghasi [49]
"Average velocity" is the vector among the choices given in the question that describes <span>how fast an object moves over a long time interval. The correct option among all the options that are given in the question is the last option or the fourth option. I hope the answer has helped you.</span>
8 0
3 years ago
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