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Alecsey [184]
3 years ago
10

Which phrase best to find a star system

Chemistry
1 answer:
Paladinen [302]3 years ago
6 0

Assuming the answers are:

a group of hundreds of stars a group of two or more stars

a group of stars that formed around the same time

a group of two stars in which one star is brighter than the other

The correct answer is b:

a group of stars that formed around the same time

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A teacher wants to perform demonstration that illustrates both chemical and physical changes. Which would be the best demonstrat
saveliy_v [14]

Answer:

D) burning a candle

A demonstration that contains both physical and chemical changes will be BURNING OF A CANDLE.

<em>This is because when a candle is lighted up, on the top of it (where we see flame) the oxygen and other gases present around will be chemically changed (burned up)</em>

<em>When the wax in the top of the candle will get melted due to the heat of the fire a physical change takes places.</em>

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3 years ago
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6 0
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How can you tell if a molecule is polar or nonpolar?.
Semmy [17]

\huge \underline\frak \red{Answer}

1) If the arrangement is symmetrical and the arrows are of equal length the molecule is nonpolar

2) If the arrows are of different lengths and if they do not balance each other the molecule is polar

3) If the arrangement is asymmetrical the molecule is polar

3 0
2 years ago
The theories of continental drift and sea-floor spreading combined to make the theory of _______. A. supercontinents B. rejoined
GarryVolchara [31]
Do not know this answer
6 0
4 years ago
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If the freezing point of a soda is – 4.5 ºC and you leave it in your car overnight when the temperature dips to 25 ºF, will the
Sveta_85 [38]

Explanation:

We leave a soda in the car overnight and the temperature dips to 25 °F. To see if it will freeze we have to convert the °F to °C.

T(°C) = ( T(°F) - 32 ) *5/9

T(°C) = (25 - 32) *5/9

T(°C) = -3.9 °C

Since -3.9 °C is a temperature greater than the freezing point (-4.5 °C) the soda won't freeze.

Answer: The soda won't freeze.

6 0
2 years ago
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