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3 years ago

If there is no oxygen in outer space, and, at the same time, oxygen must be present for fire, where does the sun come from?

Physics

2 answers:

miv72 [106K]3 years ago

6 0

The sun is a huge ball of gas it is not necessarily on fire.

victus00 [196]3 years ago

3 0

The sun is a huge ball of gas held together by gravity.

It does not burn the way wood does, due to oxygen, but it gets energy by a process called nuclear fusion, where Hydrogen is converted to Helium.

The sun will cease to "burn" when it runs out of Hydrogen, but that has a long way to go.

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gtnhenbr [62]

Answer:

I still cant see no matter how much I zoom in!???!

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3 years ago

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Example of a static balance

Rufina [12.5K]

Ability to maintain ones balance when not moving.

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4 years ago

True [87]

Answer:

$\Delta T=3.615^{\circ}C$ is the drop in the water temperature.

Explanation:

Given:

mass of ice, $m_i=14.7\ g=0.0147\ kg$

mass of water, $m_w=324\ g=0.324\ kg$

Assuming the initial temperature of the ice to be 0° C.

Apply the conservation of energy:

Heat absorbed by the ice for melting is equal to the heat lost from water to melt ice.

Now from the heat equation:

$Q_i=Q_w$

$m_i.L=m_w.c_w.\Delta T$ ......................(1)

where:

$L=$ latent heat of fusion of ice $=333.55\ J.g^{-1}$

$c_w=$ specific heat of water $=4.186\ J.g^{-1}.^{\circ}C^{-1}$

$\Delta T=$ change in temperature

Putting values in eq. (1):

$14.7 \times 333.55=324\times 4.186\times \Delta T$

$\Delta T=3.615^{\circ}C$ is the drop in the water temperature.

8 0

3 years ago

If a magnet could swing freely, what would happen to its north-seeking pole?

maksim [4K]

You clearly identified the pole you're talking about as the
"north-seeking" pole. Assuming your integrity and sincerity,
we would then naturally expect that pole to seek north, and
point to Earth's north magnetic pole.

I'm confident in this answer also because I have several of
these devices hanging from the ceiling of my office, and I can
attest to the fact that on most clear days, they do in fact point
toward Earth's north magnetic pole.

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4 years ago

Calculate the kinetic energy of a 2.2kg brick when it has a speed of 4.9m/s

Alborosie

Answer:

Kinetic energy of the brick is 26.4 Joule

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3 years ago

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If there is no oxygen in outer space, and, at the same time, oxygen must be present for fire, where does the sun come from?​

If there is no oxygen in outer space, and, at the same time, oxygen must be present for fire, where does the sun come from?