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3 years ago

How do we know the universe is a closed system?

Physics

1 answer:

Dmitrij [34]3 years ago

3 0

There has been no proof of life out side the universe

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Why is the ionic compound magnesium chloride neutral

shutvik [7]

Answer: The charges on cation and anion balances each other.

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

$Mg:12:1s^22s^22p^63s^2$

$Mg^{2+}:10:1s^22s^22p^6$

$Cl:17:1s^22s^22p^63s^23p^5$

$Cl^{-}:18:1s^22s^22p^63s^23p^6$

Thus $Mg^{2+}$ combines with two $Cl^-$ ions to give neutral $MgCl_2$

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3 years ago

A cartoon plane with four engines can accelerate at 8.9 meters per second squared

Tom [10]

The answer is 2728283 69

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3 years ago

Is all Energy the same?

anzhelika [568]

Answer:

Big NO

Explanation:

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4 years ago

Read 2 more answers

If the average time it takes for the cart from point 1 to point 2 is 0.2 s, calculate the angle θ from the horizontal of the tra

inn [45]

Answer:

hehe

Explanation:

I dont know because I am a noob ant study

5 0

3 years ago

Please help with these i dont know how to do them

Svetradugi [14.3K]

20.0M/S. IS THE HORIZONTAL VELOCITY OF THE BALL JUST BEFORE IT REACHES THE GROUND

12.2 SECONDS IS THE APPROXIMATE TOTAL TIME REQUIRED FOR THE BALL

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4 years ago