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Nadusha1986 [10]
3 years ago
7

Which of the following is a sign of a physical Change ?

Physics
2 answers:
guapka [62]3 years ago
7 0

C.) i believe because the change in shape is changing the physical appearance

galina1969 [7]3 years ago
5 0

<u>Answer:</u>

The correct answer option is C) A change in the shape of a substance.

<u>Explanation:</u>

Physical changes can be defined as the changes which affect the form of a chemical substance but not its chemical composition. These are the changes in which no bonds are broken or formed.

A change in the shape of a substance is a physical change because there is no change in composition of the substance chemically.

While all other options involve a change in chemical composition so they are not the examples of a physical change.

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You drop your cell phone. Prior to hitting the ground, the phone's kinetic energy will ________ and its potential energy will __
SVETLANKA909090 [29]

Answer:

The kinetic energy of the phone would increase. The gravitational potential energy of the phone would decrease.

Explanation:

The kinetic energy {\rm KE} of an object is proportional to the square of the speed of that object. If air resistance is negligible, the phone would accelerate under gravitational pull and speed up. Hence, the kinetic energy of the phone would increase.

The gravitational field near the surface of the earth is approximately constant. Hence, the gravitational potential energy {\rm GPE} of the phone would be proportional to its height. As the phone approaches the ground, the height of the phone becomes lower and the gravitational potential energy of the phone would decrease.

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1 year ago
This DNA strand consists of eight pairs of nitrogenous bases. How many different sequences of eight bases can you make?
BaLLatris [955]

Answer:

assuming that there is an equal amount of each base, you can make 65,536 bases

Explanation:

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8 0
2 years ago
Elements that easily transmit electricity and heat display the property known as conductivity.
Musya8 [376]


True.

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Conductivity is a physical property because the composition of the substance does not change.

A copper wire is still  a copper wire when it is conducting electricity. Like wise, an aluminum rod is still an aluminum rod when heated. It is conducting heat but the heat does not change it, it is still  an aluminum rod during the whole process.

7 0
2 years ago
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The description of the question provided above points out to the famous Big Bang Theory. In addition, this theory is among the most accepted by cosmologists because it fits like a glove to the phenomenon the universe is experiencing right now: it is expanding and distances between celestial bodies are getting farther and farther.
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3 years ago
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More weight means more force, more force will shrink the spring more.
7 0
3 years ago
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