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Trava [24]
2 years ago
6

In the early 1600's, Galileo used a telescope to investigate dark features on the Sun's surface and used them to calculate the r

ate of the sun's rotation. What areas of relatively cool gas were Galileo observing?
prominences
solar flares
photospheres
sunpsots
Chemistry
1 answer:
KatRina [158]2 years ago
4 0

Answer:

I think its "sunspots"

Explanation:

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Fusion is safer than fussion because....
Goryan [66]

Answer: B, a fusion recrion creates waste material that is easier to store than fission.

Fusion produces far less harmful waste than fission does. The reliance of something independent like whether a reaction will stop on its own when something goes wrong is never indefinite (technological failures are unpredictable and destructive a lot of the time when it comes down to nuclear power).

3 0
2 years ago
When Mrs. Green describes the physical properties of matter she said that physical properties often concern changes in state. On
dedylja [7]

Properties of matter can be broadly classified into two categories:

-Physical properties, these usually involve a change in the state of matter

-Chemical properties. these involve a change in the chemical composition of matter.

Now, physical properties can be further classified as:

Extensive: these depend on the amount of the substance, eg: mass, volume  

Intensive: these do not depend on the amount of the substance eg: density, color, melting point, boiling point

A physical property that does not describe a change in state is color. For example: copper sulfate is a compound which is a blue in color. Thus, color provides information which describes the appearance of matter. In contrast, properties like melting or boiling point suggests a change in the state of the substance.


3 0
3 years ago
3. How many molecules are in 0.500 moles of sulfur?
satela [25.4K]

Explanation:

No of molecules=0.500×6.023×10²³=3.011×10²³ molecules

7 0
3 years ago
Name two events involving electrons that can result in the formation of chemical bonds between atoms.
Alona [7]

Explanation:

Two events involving electrons are gain and loss of electrons.

When there is gain or loss of electrons between two atoms then it results in the formation of ionic bond.

Whereas when there is sharing of electrons between two atoms then it results in the formation of covalent bond.

Therefore, the chemical bonds formed can be ionic or covalent bonds.

6 0
3 years ago
When a nonmetal bonds with a nonmetal it is a _ bond
Karolina [17]

It is a covalent bond

3 0
3 years ago
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