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kow [346]
4 years ago
10

Which is TRUE about physical changes but not chemical changes?

Chemistry
1 answer:
Naily [24]4 years ago
3 0
B

No new substances are made
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NEED ANSWER FAST
Korolek [52]

Answer: Option (c) is the correct answer.

Explanation:

When current passes through a wire then a magnetic field is formed. Therefore, when two wires carry current in the same direction then both the wires with have respective magnetic fields in the same direction and their total magnetic field will be large.

But when current between two wires flow in opposite direction then the magnetic field produced will also be in opposite direction. Therefore, both the magnetic fields cancel each other out. Thus, total magnetic field will be small.

As a result, wires which carry current in the opposite direction repel each other.


4 0
4 years ago
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Answer:

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Explanation:

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Which type of compound usually has higher melting points: ionic compounds or covalent compounds?
faltersainse [42]
Ionic bonds generally have higher melting points due to stronger electrostatic interactions. 
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What is the smallest part of a compound that retains the properties of that compound?
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