explain physical changes

Answers

Answer 1

Answer:

A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.

Explanation:

Examples of physical change include changes in the size or shape of matter.  Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting.

Answer 2
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds. Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances. In general a physical change is reversible using physical means. For example, salt dissolved in water can be recovered by allowing the water to evaporate.A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.An example of a physical change is the process of tempering steel to form a knife blade. A steel blank is repeatedly heated and hammered which changes the hardness of the steel, its flexibility and its ability to maintain a sharp edge.Many physical changes also involve the rearrangement of atoms most noticeably in the formation of crystals. Many chemical changes are irreversible, and many physical changes are reversible, but reversibility is not a certain criterion for classification. Although chemical changes may be recognized by an indication such as odor, color change, or production of a gas, every one of these indicators can result from physical change.

Related Questions

All the following would be considered play gym or academic dishonesty except for which of the following

Answers

Answer:

Citing a source completely and correctly

Explanation:

Information exists to be learned from and if we, learn from it, understand it, and use to in our purposes...it is just putting the information to use.

order of magnitude of mass of electron​

Answers

Answer:

[tex]its \: - 30 \\ because \: mass \: of \: electron = 9 \times {10}^{ - 31} \\ 9can \: be \:round \: in \: to \: 10so \: 10 \times {10}^{ - 31} \\ = {10}^{ - 30} \\ then \: order \: = - 30 \\ thank \: you[/tex]

Will give Brainliest! :D

Answers

Answer:

SOH CAH TOA! 8

Explanation:

Who are the best candidates for members of the BPA? Select two options.

Allan wants to provide education for young people.
Brenna wants to have a career in computer-related work.
Philomena wants to have a career in agriculture.
Cody wants to manage a company’s office.

Answers

Look at the picture

let the girls sing a song.passive mood​

Answers

The song will be sung by the Girls.

[tex] \small { \underbrace{ \overbrace{hope \: it \: helps \: mark \: me \: as \: brainliest}}}[/tex]

An object with a density of 0.85 g/cm3 is dropped into each of the two beakers

shown below. What will happen to the object in each case?

X

Beaker 1

Denalty 0.5 ml

Denalty - 10 L

O A It will sink in both beakers

O B. It will float in Beaker 1 and sink in Beaker 2

O C. It will sink in Besker 1 and float in Beaker 2.

OD. It will float in both beakers

Answers

it will sink both bricks

In what part of the ocean do you find most marine organisms?



Group of answer choices

shallow, coastal waters

fisheries

deep ocean waters

none of the above

Answers

Answer:

shallow, coastal waters is the answer.

“Who am I?”
- -
\ /
;-;
|
|
/ \
/ \
- -

Answers

you are nevahbowe. Hope you are askibg me your name

What’s the answer for this inequalities

Answers

Answer:

C.

Explanation:

It states at least 1500. Eliminating B and D due top the fact that they have or less. To have the 1500 or more you must have x+y+z be more than 15. So it would make the answer C.

square of square root of 25​

Answers

Answer:

[tex]25 \\ { \sqrt{25} }^{2} \\ { \sqrt{25} }^{2} = { {25}^{ \frac{1}{2} } }^{2} \\ = {25}^{ \frac{2}{2} } = 25 \\ thank \: you[/tex]

How was Malcolm X's approach to gaining civil rights different from Dr. King's? Why do you think he resisted King's approach?

Answers

Answer:

Near the end of his life, Malcolm X publicly recognized that "Dr. King wants the same thing I want — freedom!" But for most of his ministry he did not identify with King and the civil rights movement. Although both Black Muslims and King's Southern Christian Leadership Conference had the same general goals of defeating white racism and empowering African Americans, Malcolm and King had different tended to speak at different venues (street corners vs. churches) and had different aims. Malcolm, who would publicly deny that he was even an American, worked for a Nation of Islam that sought to create a separate society for its members. Malcolm rejected integration with white America as a worthwhile aim (deriding it as "coffee with a cracker") and particularly opposed non-violence as a means of attaining it. "That's what you mean by non-violent," he said, "be defenseless." In Malcolm's mind, the African American could never surrender his right of self-defense against white violence.

Explanation:

I think that because Malcolm X had a different opinion thank King's approach on the civil rights movement he wanted to stick to it.

Read the list of phrases from the section "First Steps In CSI."

isolated and secured

crucial physical evidence

series of protocols

establishes a perimeter

How does the tone developed by these phrases help the author achieve her purpose?

1. by conveying a sense of lonely and secluded work conditions

2. by conveying a sense of physically demanding and difficult work

3. by conveying a sense of fascinating and adventurous events

4. by conveying a sense of a deliberate and methodical procedure

Answers

by conveying a sense of deliberate n methodical procedure

Drought
conditions
in
an
agricultural
area
often
impacts
food
production
for
example
during
a
dry
spell
in
2014
stockpiles
of
corn
in
the
United
States
decreased
forty-eight
percent
between
March
and
June

Answers

Answer:

Drought can be considered as a strictly meteorological phenomenon. It can be evaluated as a meteorological anomaly characterized by a prolonged and abnormal moisture deficiency

Answer: impact

Explanation:

32

A group of coworkers decided to buy their borsa

$400 birthday gift and to split the cost equally among

themselves. When three of the conorkes decided not

to contribute, those remaining still divided the $400-

birthday gift equally, but each coworket's share of the

cost increased by $30. How many coworkers were in

the group originally?

Answers

Answer:

830$ is answer.

is answer

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