Why do scientists often use melting point and boiling point to identify substances?

Answers

Answer 1

Answer:

Melting or boiling point is another property that scientists can use to identify a substance. Melting point is the temperature at which a substance changes from solid → liquid. Boiling point is the temperature at which a substance changes from liquid → gas.

Explanation:


Related Questions

What characteristic of an element determines how its atoms can bond with other atoms?

A. its total number of electrons
B. its number of valence electrons
C. how many low-energy-level electrons it has
D. how many protons and neutrons it has

50 brainly points!

Answers

Answer:

The answer is A

Explanation:

its total number of electrons

What source did you use the most in your research? What was the name of the source? Where did you find this source (book, newspaper, magazine, online)? How do you know that this source is trustworthy?
HELPPPPP PLEASEEEEE

Answers

Answer:

Can you show more information please?

Explanation:

The personal experiences, print media like books, pamphlet, journals, magazines, and newspapers, as well as electronic sources accessed via the Internet, can all be used as research resources.

What do you mean by research ?

Research is a systematic inquiry process that includes data gathering, documentation of important information, analysis, and interpretation of that data and information in accordance with appropriate procedures established by particular academic and professional disciplines.

You can use databases and search engines like Scholar to look for academic sources online. They offer a variety of search options that might assist you in locating the most pertinent sources. Include the title or the author's name in your search if you're looking for a specific article or book.

The primary publication format for scholarly research is scholarly journals. Students can read the majority of intellectual articles online and through library databases.

Thus, These can also come from polls and interviews that you or another else conducts.

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List the characteristics of life that plants and animals in a food web share

Answers

Answer:They are movement, nutrition, respiration, sensitivity, reproduction, excretion,and growth.

Explanation:

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Thus, movement, nutrition, respiration, sensitivity, reproduction, excretion and growth are  the characteristics of life that plants and animals in a food web share.

What is matter?

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Movement, nutrition, respiration, sensitivity, reproduction, excretion and growth are  the characteristics of life that plants and animals in a food web share.

Thus, movement, nutrition, respiration, sensitivity, reproduction, excretion and growth are  the characteristics of life that plants and animals in a food web share.

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Imagine that you and your friend are at the beach. You have your chairs and umbrella set up in the perfect spot near the water so you can jump in to cool off with ease. A few hours into your stay, the water line has managed to creep up closer and closer to your chairs and your things start to get wet! Your friend points up at the Moon and says it is to blame. What does this mean? Write a response in complete sentences. I NEED A ANSWER PLZZZZZ! And this is a science question.

Answers

Answer:

High tides and low tides are caused by the moon. The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. ... When you're not in one of the bulges, you experience a low tide.

In humans, tongue rolling is dominant over non-rolling. A man who can roll his tongue marries a woman who cannot. They have 8 children, of which 6 can roll their tongue. What is the genotype of these 6 children? Why?

Answers

Answer:

50% cant roll their tounge

Explanation:

What class of lever is shown below?



Question 3 options:

First Class Lever


Second Class Lever


Third Class Lever


Forth Class Lever

Answers

forth class lever you can see it
It is the forth class lever

Which 3 characteristics are used to describe all waves, regardless of type? Check all that apply.

Resting Position

Frequency

Trough

Amplitude

Crest

Wavelength

Answers

frequency trough crest

what do drumlins tell us about glaciers

Answers

Drumlins are the hills of rock, sand, and gravel formed by moving glaciers
Drumlins are the hills of rock,sand,and gravel formed by moving glaciers. The person above me is correct

Which electromagnetic wave has a lowest frequency?

ultraviolet light

visible light

microwaves

x-rays

infrared light

Answers

Answer:

microwave

Explanation:

Microwaves as the lowest frequency in the list.

I am pretty sure it is microwaves, like the other answer says

Which type of electromagnetic energy must be used carefully in medicine so it does not damage living tissue?(1 point)

low frequency waves
visible light
radio waves
gamma rays

Answers

Answer: Gamma rays
Explanation: They are used to kill the dead cells from e.g. cancer but they don’t destroy the living cells as gamma is only a wave.

Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. Therefore, gamma rays is used carefully in medicine without damaging living tissue.

What is electromagnetic wave?

Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave.

There is a relation between energy of wave. frequency of wave, and wavelength of wave

Mathematically,

E=hc/λ

where,

E = energy of electromagnetic wave

h is planks constant having value 6.67×10⁻³⁴js

c is speed of light that is 3×10⁸m/s

λ is the wavelength of electromagnetic wave

There are many uses of electromagnetic radiations in medical field. Gamma rays are used to kill the dead cells from e.g. cancer but they don’t destroy the living cells as gamma is only a wave.

Therefore, gamma rays is used carefully in medicine without damaging living tissue.

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I need help, ACTUAL ANSWERS PLEASE

Answers

What’s the question?
What’s the question you need help with?

3.How are climate and weather different?
4.How can you depict annual precipitation at a site location, like a local airport?
5. What is the transformation of water vapor to liquid water droplets in the air?

Answers

Number 3. c.

Number 4. a.

Number 5. d.

Climate is different from the weather. Climate is the long term weather condition and weather is short term atmospheric condition. The annual precipitation is report is depicted as graphical data. Transformation of water vapor to liquid droplets in air is called condensation.

What is climate?

Climate in a region is the long term weather exists there and which will be characteristic for that region. Weather is forecasted for a day or a particular time, reporting the short term atmospheric condition. Climate of a locality depends on the landscape there, local winds etc.

The annual precipitation report determined by the summation of monthly precipitation data and which in turn obtained by the summation daily precipitation for each month and it is depicted graphically to analyse.

The transformation of water vapor to liquid droplets in the air is called condensation. The gaseous molecules of the water vapor condense together to form the liquid droplets.

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what would happen to an object of 2.5g/ml when is placed in 1g/cm3

Answers

Answer:

It would sink because it is more dense.

Explanation:

When ever you see grams/mL or g/cm^3, know that they are the same thing.

mL = cm^3

He right have a good day

A shorter wavelength does what to the frequency?

Increases the frequency to a lower frequency

Decreases the frequency to a higher frequency

Decreases the frequency to a lower frequency

Increases the frequency to a higher frequency

Answers

Increase the frequency to a higher frequency

Answer:

Increases the frequency to a lower frequency

Explanation:

Help plz Noo Links Bots Or scams. If a chromosome folds, how is transcription prevented?

Question 2 options:

The DNA region is easily accessible.


The DNA region is not easily accessible.


The RNA region is not easily accessible.


The RNA has already been made.

Answers

Answer:

Regulatory sequences are bound tightly and specifically by transcriptional regulators, proteins that can recognize DNA sequences and bind to them. The binding of such proteins to the DNA can regulate transcription by preventing or increasing transcription from a particular promoter.

Which two changes of state can occur when a substance gains thermal energy A sublimation b depositation c condensation and d vaporization

Answers

Answer:

b

Explanation:

Answer:

A and D

Explanation:

I got it on my test

Your teacher has set up an investigation for class today. The following materials are on the science lab table.
Piece of unglazed
white porcelain
Iron pyrite
Hematite
Mica
Talc
Halite
Magnetite
Which property of minerals will you be testing for?
A cleavage
B density
C hardness
D streak

Answers

Answer:

Explanation:

c.

Answer:

Your would be C hope this helps...

Explanation:

Many businesses are using infrared thermometers to check customer's temperatures as they enter. What are the benefits of using these thermometers? (Select all that apply.)

They check temperature using thermal energy waves that people give off.

They don't have to touch the person to accurately find their temperature.

They check temperature using UV light that people give off.

They have to touch a person to accurately find their temperature.

Answers

Answer:

Pretty sure B is one of them.

Explanation:

Explain The process of Photosynthesis according to the chemical formula: Identify: The reactants(input), the products(outputs), and the energy source. **(Hint: Carbon Dioxide + Water = Glucose + Water)

Answers

Answer: 6CO2 + 6H2O → C6H12O6 + 6O2

Explanation:

The equation for photosynthesis is 6CO2 + 6H2O → C6H12O6 + 6O2.

What would happen to the gravity between two objects if the mass of one object decreased?
1. gravity would increase
2.gravity would decrease
3. wouldn't change
PLz help

Answers

gravity wouldn’t change

For example," "however," and "also" are examples of:

conjunctions

introductory words

nouns

adjective

Answers

Answer:

conjunctive adverbs

Explanation:

Some examples of conjunctive adverbs are: accordingly, also, besides, consequently, finally, however, indeed, instead, likewise, meanwhile, moreover, nevertheless, next, otherwise, still, therefore, then, etc.

The magnetic field of an object exerts a force on any magnetic object around it.

True
or
False

Answers

i believe the answer is true
that’s isssssd true

If a chromosome folds, how is transcription prevented?

Question 2 options:

The DNA region is easily accessible.


The DNA region is not easily accessible.


The RNA region is not easily accessible.


The RNA has already been made.

Answers

Answer:

The DNA region is not easily accesible.

Explanation:

PLZ HELP ASAP
Pretend you are teaching a friend about the differences between plant and animals cells. Your friend isn’t even sure they know there is a difference between the types of cells.) Write a narrative of what you would say to your friend to explain how the plant and animal cells are different from each other and why these differences are important.

Answers

Answer:

plant cells and animal cell have similaritys but also haev diffrences.

Explanation:

one example of a diffrence bettwen them is that plants have a cell wall but a animal doesnt even tho they are both living organizoums

ASAP i need a picture of Pangaea

Answers

Answer: I hope this helps!

The magnetic field of an object exerts a force on any magnetic object around it.

True or False

Answers

Answer: True

Explanation: this is true

true it’s just true no explanation needed

What are two results of the uneven heating of Earth's surface?

Answers

the uneven heating results in some of the atmosphere to be warmer than other parts and changes in volume and pressure which result in updrafts and can cause thunderstorms and other violent weather

tell me if its wrong !!

HELPPPPPPP :> WHY DO I NEED 20 WORDS

Answers

The answer is C
Osmosis is a special case of diffusion involving water. In Osmosis, water molecules move from areas of where there’s a higher amount of water (high concentration) concentration to areas where there’s less water (lower concentration)

13. will any of the bulbs light if you open the switch?
14. which bulbs would continue to shine if bulb 1 broke? which would shine if bulb 2 broke instead? Explain.

Answers

Answer:

14.None would shine if bulb 1 broke

Explanation:

Bulb one connects all the other bulbs to the switch. If bulb 2 broke instead only 1 and 3 will shine because bulb 2 is not connected to bulb 3. all the bulbs should light when the switch is on.

I dont think I actually got this right pls dont take my answer for fact.

NEED HELP ASAP!!!!!!!!! PLEASE ANSWER IN 10 minutes or under
What are the two possible benefits of the new plastic bag?

Answers

Answer:

The new bag helps food last longer. Less food is wasted, and more money is saved.

Explanation:

PLATO

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