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alexdok [17]
3 years ago
12

What is needed to start a chemical reaction

Physics
2 answers:
LekaFEV [45]3 years ago
4 0

Answer:

reactants are needed to start a chemical reaction

Explanation:

am I correct

Novosadov [1.4K]3 years ago
3 0
Activation energy is needed to start a chemical reaction
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Two bodies made of the same material have same external dimension and appearance, but one is compact solid and other is hollow.
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Answer:

Different

Explanation:

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You jump off a truck and accelerate toward the surface of the Earth. Does the Earth accelerate toward you?
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When we jump from the truck and accelerate towards the earth surface, the earth also accelerates towards us but it's acceleration is very negligible.

To find the answer, we need to know about the acceleration of earth due to the gravitational attraction.

<h3>What's the gravitational force between the earth and a person?</h3>
  • Gravitational attraction force is GMm/r² between the earth and a person.
  • M= mass of the earth

m= mass of the person

r= separation between them.

<h3>What's the acceleration of the earth towards the person when he jumps from a truck?</h3>
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so acceleration of earth= Gm/r²

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Thus, we can conclude that the earth also accelerates towards us.

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