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White raven [17]
3 years ago
9

Which change is the best example of a physical change?

Mathematics
2 answers:
saw5 [17]3 years ago
8 0
There are multiple examples, for instance:

- Cutting a paper
- Ripping an object
- Mixing sand and water

Basically, anything that changes an object but is able to be reverted back to its original form. Since physical change is the opposite of chemical change, you need to focus on the factor that physical change keeps its original form.

A chemical change is when you can't revert the object back to its natural form, for instance, burning a paper or lighting anything on fire. 

Hope this helps!

Studentka2010 [4]3 years ago
4 0

This is an incomplete question, here is a complete question.

Which change is the best example of a physical change?

1) a cookie baking

2) a paper burning

3) ice cream melting

4) a nail rusting

Answer : the correct option is, (3) ice cream melting

Step-by-step explanation :

Chemical change : It is a change where changes occurs in the chemical composition and thus resulting in the formation of new compound or substance. It is an irreversible reaction.

The indication of chemical changes are :

Formation of gas bubbles.

Formation of precipitate.

Change in color.

Change in temperature.

Change in volume.

Change in smell or taste.

Evolution of heat, light and sound.

Physical change : It is a change in which shape and size of a substance changes. In this there is no change in the chemical composition of the substance and no new substance is forming. It is a reversible reaction.

The indication of chemical changes are :

Change in shape.

Change in form.

Change in size.

Change in phase.

1) a cookie baking

2) a paper burning

4) a nail rusting

Option 1, 2 and 4 are a chemical change because changes takes place in the chemical composition and form new compound.

3) ice cream melting  : It is a physical change because only changes takes place in the phase from solid phase to liquid phase.

Hence, the best example of a physical change is, ice cream melting.

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Two of the interior angles of a triangle are 50° and 75°. Which of the following could be a measure of an exterior angle of the
Karolina [17]

Answer:

Step-by-step explanation:

so, 50+75=125.

180-125=55.

There can be-

130, 95, and 125

8 0
2 years ago
Which are characteristics of the graph of the function f(x) = (x + 1)2 + 22 Check all that apply.
Sunny_sXe [5.5K]

Answer: The domain is all real numbers

I can't say that the y intercept is 3 because when you distribute,

f(x) = (x + 1)2 + 22 \\ f(x) = 2x + 2 + 22 \\ f(x) = 2x + 24

It seems like the y intercept is 24.

5 0
3 years ago
If x, y, and z are integers greater than 1, and (327)(510)(z) = (58)(914)(xy), then what is the value of x?
algol [13]

Answer:

<u>Statements (1) and (2) TOGETHER are NOT sufficient.</u>

Explanation:

As in the equation (327)(510)(z) = (58)(914)(xy) there are THREE variables in total i.e. "x", "y" and "z" hence minimum three equations are required to find out values of all variables. Hence,

If the given number of equations is equal to total variable used in any of the equation, values of all the variables can be find out otherwise there can be unlimited number of solutions.

So, value of "x" cannot be determined with the given data.

5 0
3 years ago
Please answer this, I need help ​
frutty [35]

Answer:

-$7

Step-by-step explanation:

20 - 15 = 5

5 + 5 = 10

10 - 10 = 0

0 - 7 = -7

8 0
3 years ago
Read 2 more answers
A bicycle shop is selling $500.00 bikes at 10% off. if the sales tax is 7% how much will the bike cost?
Vladimir [108]
The bike will cost $481.50
because 
10% off of 500 is 50 
so 500 - 50 = 450
Now include the sales tax which is
450 * 0.07 = 31.5
Now add the two totals to get 
$481.50
4 0
3 years ago
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