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Hunter-Best [27]
3 years ago
9

When a substance has changed into something new or different so that the original substance is gone, as in digestion, radioactiv

e decay, or a battery in a flashlight producing light, it is known as a ______________________________.
a.physical property
b.chemical property
c.physical change
d.chemical change
Physics
2 answers:
andreyandreev [35.5K]3 years ago
7 0

Answer:

d . chemical change.

Explanation:

Physical change involves change which can be retrieved back . sugar is dissolved in water . It is physical change . because sugar can be retrieved by evaporating water.

burning of coal is a chemical change because the ash that we get after burning coal can not be turned into coal .

In the given case in the problem , after digestion , things that  are formed are  quite different . After radioactive decay new element is produced . In battery , current is produced after the chemical reaction which produces new products.

Hence all they involve chemical change.

Reil [10]3 years ago
6 0

Answer:

d

Explanation:

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A person tries to lift each object with a force of 25 N, upward. Which
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Answer:

Option C. Objects 1 and 3 will not move, and objects 2 and 4 will accelerate

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Explanation:

The following data were obtained from the question:

OBJECT >>>>>>>>> WEIGHT (N)

1 >>>>>>>>>>>>>>>> 35

2 >>>>>>>>>>>>>>>> 23

3 >>>>>>>>>>>>>>>> 26

4 >>>>>>>>>>>>>>>> 18

Force (F) applied = 25 N

From the above, the force applied to each object is 25N. Thus the following can be concluded based on the data given above:

For object 1:

Weight = 35 N

Force applied = 25 N

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For object 2:

Weight = 23 N

Force applied = 25 N

Thus, the object will move since the force applied is greater than the weight of the object.

For object 3:

Weight = 26 N

Force applied = 25 N

Thus, the object will not move since the weight of the object is greater than the force applied.

For object 4:

Weight = 18 N

Force applied = 25 N

Thus, the object will move since the force applied is greater than the weight of the object.

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3 years ago
Read 2 more answers
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