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timofeeve [1]
2 years ago
12

Why is it possible for star that is no longer in space to still appear to shine?

Chemistry
2 answers:
Kamila [148]2 years ago
5 0
There is a difference in the time we see things from space. There is a delay so we see things after they happen
Helen [10]2 years ago
5 0

Answer:

Explanation:

stars are so far away from Earth that, even through large telescopes, they appear only as pinpoints. And it’s easy for Earth’s atmosphere to disturb the pinpoint light of a star. As a star’s light pierces our atmosphere, each single stream of starlight is refracted – caused to change direction, slightly – by the various temperature and density layers in Earth’s atmosphere. You might think of it as the light traveling a zig-zag path to our eyes, instead of the straight path the light would travel if Earth didn’t have an atmosphere.

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How many aluminum atoms are in 1 mole of aluminum?
natulia [17]

Answer:

2 atoms of aluminium makes a molecule of aluminium

8 0
3 years ago
Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react
laiz [17]

1) List the reactants: sodium bicarbonate (NaHCO₃) and citric acid (H₃C₆H₅O₇).

Reactants undergo change during a chemical reaction.

2) List the products: water (H₂O), carbon dioxide (CO₂) and sodium citrate (Na₃C₆H₅O₇).

Products are the substances formed from chemical reactions.

3) The balanced chemical equation:

3NaHCO₃ + H₃C₆H₅O₇ → 3H₂O + 3CO₂ + Na₃C₆H₅O₇.

6 0
3 years ago
If it takes 2000 years to weather 1 cm of limestone, how long will it take to weather 5 cm of limestone?
Anna71 [15]

Answer:10,0000 years

Explanation:

If it takes 2000 years to weather 1cm of limestone

It will take 5*2000 years to weather 5cm of limestone. This gives us 10000 years.

3 0
3 years ago
Drill bits are attached to power drills to make holes. drill bits are made of because they’re hard and resistant to corrosion. t
Svetllana [295]
<span>Drill bits are attached to power drills to make holes. Drill bits are made of carbon-steel because they’re hard and resistant to corrosion. However, it is not only limited to carbon-steel. There are also other materials that are used for drill bits such as high speed steel, titanium coated steel and the like. The bodies and handles of power drills are made of polyethylene because they’re good insulators. </span>
7 0
3 years ago
Give the concentration of solution which contains 2.5g of sugar dissolved in 50g of water.
meriva

Answer: -

The concentration of solution which contains 2.5 g of sugar dissolved in 50 g of water is 5 % (w/w)

Explanation: -

Amount of sugar = 2.5 g

Mass of water = 50 g

Concentration of sugar = \frac{2.5 g}{50g} x 100

= 5%

Thus the concentration of sugar is 5 % (w/w)

8 0
3 years ago
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