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seropon [69]
3 years ago
14

Which statement is true regarding a chemical reaction?

Physics
2 answers:
alina1380 [7]3 years ago
8 0

Answer:

B) The total number of atoms does not change, so mass is conserved in the reaction.

Explanation:

According to the <u><em>Law of Conservation of Mass</em></u>, no matter can ever be created or destroyed. The number of atoms does not change, thus the mass does not change.

hoa [83]3 years ago
6 0

Answer:

B

Explanation:

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Answer:

Explanation:

Using the principle of moment, assuming the rod is uniform rod of mass 1 kg

the center of mass of the rod will be at 1 m

assuming the system is in equilibrium,

clockwise moment = anticlockwise moment

let the distance of the man shoulder be x from the center of gravity and also is the pivot point

total mass of bucket + mass of honey = 2kg + 3 kg =  5 kg for rear bucket and

2kg + 5 kg = 7 kg for front bucket

( 5kg × ( 1+x)) + ( 1 kg × x) = 7 kg × ( 1 - x)

5 + 5 x + x = 7 - 7x

5 + 6x = 7 - 7x

6x + 7x = 7 - 5

13x = 2

x = 2 / 13 = 0.154 m

the honeybucket man's shoulder is 0.154 m from the center of the pole ( forward ).    

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3 years ago
When you must give something up in order to get something else, it is called...
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3 years ago
A space probe produces a radio signal pulse. If the pulse reaches Earth 12.3 seconds after it is emitted by the probe, what is t
adoni [48]

Answer:

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Substituting the values of speed and time into equation 1;

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2 years ago
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Answer:

Explanation:

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