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sashaice [31]
3 years ago
15

What kind of change forms a chemical reaction?

Chemistry
2 answers:
satela [25.4K]3 years ago
7 0
Physical change I’m pretty sure
Zolol [24]3 years ago
7 0

Answer:

a chemical change is correct answer

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4) If an object is traveling at a speed of 400 m/s, how long (in hours) will it take to reach 950.5 km?
gogolik [260]

Answer:

Answer: 0.66 hours

Explanation:

{ \rm{time =  \frac{distance}{speed} }} \\  \\ { \rm{time =  \frac{(950.5 \times 1000) \: m}{400 \: m {s}^{ - 1} } }} \\  \\ { \rm{time =  {2376.25 \: s}}}

• Remember 1 second accounts for 1/3600 hours

{ \rm{time =  \frac{2376.25}{3600} }} \\  \\ { \rm{time = 0.66 \: hours}}

4 0
3 years ago
The way in which light moves through objects is related to the type of material from which the object is made
adelina 88 [10]

Answer: True

Explanation:

The speed of light in a material medium depends on its molecular structure, in particular its electromagnetic properties, electrical and magnetic permeability. These properties may have different values for different wavelengths or frequencies of the incident light.

In this way,<u> the speed of light depends on the medium and reaches its maximum value in a vacuum</u>, so that, it will be lower in a material medium . In the vacuum (or in the air) the speed of light is 3 x 10⁸ m / s and in any other medium its value is lower.

<u>To characterize the particularities of the propagation of light in the media</u>, the refractive index is introduced ,

n = c / v  

where c is <u>speed of light in a vacuum</u>  and v is t<u>he speed of light in the medium</u> considered . So the speed of light in a medium is given by the refractive index whose value is always greater than 1.

6 0
4 years ago
Indicate whether the following interactions of matter include a physical or chemical change. P/C? Evidence
Anarel [89]
1. CHEM CHANGE
2. PHYS CHANGE
3. CHEM CHANGE
4. CHEM CHANGE
5. PHYS CHANGE
3 0
3 years ago
What atom has the largest atomic radius barium calcium magnesium radium
iogann1982 [59]

Answer:

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Explanation:

It has the highest atomic number so it would have more shells, making it larger than the others.

6 0
3 years ago
What is <br><br> 114.1 kPa to atm
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Answer:

1.126 atm

Explanation:

4 0
4 years ago
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