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nlexa [21]
3 years ago
11

What happens when a substance undergoes a physical change?

Physics
2 answers:
vodka [1.7K]3 years ago
8 0
A: Some physical properties change, but the substance keeps its identity.
zlopas [31]3 years ago
8 0

Answer;

A: Some physical properties change, but the substance keeps its identity.

Explanation;

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This is different from chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.

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If a substance is changing from a vapor to a liquid, like steam on a mirror, it is said to be _______.
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Answer:

condensing

Explanation:

Condensing is the word used to indicate the change of state of a substance from vapor to liquid, as in this case. During condensation, the substance releases thermal energy to the environment, therefore the kinetic energy of the molecules in the vapor decreases until they become closer to each other and they start to be affected by the intermolecular forces and so the substance becomes a liquid.


8 0
3 years ago
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Why are unit of length mass and time independent with each other?​
mariarad [96]
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Все другие единицы в системе СИ являются производными от 7 основных единиц, таких как скорость (метр / секунда).

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4 0
3 years ago
Are defined as subatomic particles that have more mass than neutrinos but do not interact with light.
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bija089 [108]

Answer:

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Where, ρ is the resistivity of the conductor, l be the length of the conductor and A be the area of crossection of the conductor.

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