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2 years ago

Question 25

Physics

1 answer:

aniked [119]2 years ago

7 0

Answer:

o The result of a chemical change is a different composition; in a physical change, the composition remains the same.

Explanation:

In a chemical change, new kinds of matter are produced although the atoms are the same.

For physical changes, no new kinds of matter formed. Only the state of substances changes.

Most chemical changes are usually irreversible
Physical changes are reversible in most parts.
Changes in state and form are salient characteristics of physical changes.
When new products are formed from the reactants, it is an indicator of a chemical change.

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Illusion [34]

Answer:

The answer is 80 kN . m (clockwise)

Explanation:

As,

M = P x L

Here, the towline exerts a force is P.

Substituting P for 4000N.

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= -80000N.m

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Maximum moment about the point O is 80kN.m (Clockwise)

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igor_vitrenko [27]

Answer:

0.64 m from the first charge

Explanation:

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These forces are equal

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Answer:

C) The upward force of air resistance is greater with the note card causing it to reach the ground slower.

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OLEGan [10]

Answer:

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