All categories

3 years ago

What is the difference between a physical change and a chemical change

2 answers:

6 0

A physical change in something doesn't change what the it is. For example, if you break glass, it will still be glass. In a chemical change where there is a chemical reaction, a new thing is formed and energy is either given off or absorbed. For example, when you burn a log. The carbon in the log is reacting to the oxygen to create ashe and smoke

Aleks [24]3 years ago

4 0

physical rearranges molecules but doesn't affect their internal structures while chemical <span>is any change that results in the formation of new chemical substances</span>

You might be interested in

Light of wavelength 436.1 nm falls on two slits spaced 0.31 mm apart. What is the required distance from the slits to the screen

kakasveta [241]

Answer:

The correct answer is "4.26 m".

Explanation:

Given:

Wavelength,

$\lambda = 436.1 \ nm$

or,

$=436.1\times 10^{-9} \ m$

Distance,

$d = 0.31 \ mm$

or,

$=0.31\times 10^{-3} \ m$

Distance between the 1st and 2nd dark fringes,

$(y_2-y_1) = 6\times 10^{-3} \ m$

As we know,

⇒ $\frac{d}{L} (y_2-y_1) = \lambda$

or,

⇒ $L=\frac{d(y_2-y_1)}{\lambda}$

By substituting the values, we get

$=\frac{0.31\times 6\times 10^{-6}}{436.1\times 10^{-9}}$

$=\frac{0.31\times 6\times 10^3}{436.1}$

$=\frac{1860}{436.1}$

$=4.26 \ m$

3 0

3 years ago

Can someone please answer these in the next 20 minutes. ill give you a brainiest. thanks! :)

oee [108]

Answer:

1. 2380m

2. 13.6m

3. 132 Hz

6 0

3 years ago

Which of Newton’s Laws explains why an object originally moving in a circular path will continue in a straight line path if the

Andreas93 [3]

When object is moving in circular path then if suddenly its force reduced to zero then it will move to straight line

This is defined by Newton's First Law

So as per first law of Newton we can say

When there is no net force on an object then it will continue its state of motion in its original state without any change in it.

This is also known as law of inertia

so correct answer will be

Newton's 1st law

6 0

3 years ago

PLZ HELP ME 3 MIINS 50 POINTS AND BRAINLEIST

yawa3891 [41]

Answer:

I calculated the mechanical advantage. It is in the picture above

but I haven't gotten the weight but I know the general formula of weight 2 be m×g (mass ×gravity) I will get back 2 u once I solve it plz don't be offended and plz Mark me brainliest answer

4 0

3 years ago

Read 2 more answers

Which two men developed the steam engine?

maks197457 [2]

The steam engine is developed by Newcomen and James Watt.

The first steam engine is founded by the James watt in the year 1763, but requires several improvements, which are performed by the Newcomen, later in 1775, therefore the credit for development of steam engine goes to Newcomen and James Watt.

3 0

4 years ago

Read 2 more answers