1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Dmitry_Shevchenko [17]
3 years ago
7

How could the survivors about starting a fire?

Chemistry
1 answer:
joja [24]3 years ago
6 0

Answer:

The ancient Greeks believed that fire was one the four basic elements that composed all things in the universe. In the mythology of virtually every culture, fire is a sacred substance that gives life or power. Fire is not, in fact, a substance. When you gaze at the leaping flames of a campfire, you’re observing not an object, but a process – a chemical reaction. It’s the same chemical reaction that occurs when a cut apple left on the counter turns brown, when silver tarnishes or when an iron nail rusts.

That process is oxidation: combining oxygen with another substance. The defining difference between a fire and your half-eaten apple is speed: fire is an oxidation process that happens very fast, so that light, heat and sound are released — often with enough force and majesty to justify the ancients’ reverence.The sudden release of energy causes temperatures to rise, sometimes by thousands of degrees. And it also results in smoke, the toxic waste of fire’s leftovers.

The fire triangle and the fire tetrahedron

Fire TetrahedronThe fire triangle identifies the three needed components of fire:

fuel (something that will burn)

heat (enough to make the fuel burn)

and air (oxygen)

Explanation: i hope this helps sry its long

You might be interested in
A truck traveled at a constant speed for 6 hours. Then, it
gavmur [86]

Answer:

2.4 hrs

Explanation:

The constant speed of the truck for 6 hrs can be calculated by: speed=distance/time. Speed =(876-228)/6=648/6=108m/s. So the decreased speed = (108-13)=95m/h. Now, speed =distance /time We get 95m/h = 228/t. t=228/95 hrs = 2.4 hrs PLEASE MARK ME THE BRAINLIEST!!

7 0
3 years ago
Read 2 more answers
Valance shell example..​
Natali5045456 [20]

Answer:

<h2>Oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.</h2>

<h3>Valence electrons are the electrons in the outermost shell, or energy level, of an atom. </h3>

<h3>Configuration of oxygen's valence electrons as 2s²2p⁴.</h3>

Explanation:

#Let's Study

#I Hope It's Help

#Keep On Learning

#Carry On Learning

\\ \green{MaggieEve}

3 0
2 years ago
Greater than ___________ mcg/dl is considered a high level of morning cortisol.
Natalija [7]

Greater than 23mcg/dl is considered a high level of morning cortisol.

Normally, cortisol levels rise during the early morning hours and are highest about 7AM. They drop very low in the evening and during the early phase of sleep. If you do not have this daily change (diurnal rhythm) in cortisol levels, you may have overactive adrenal glands. This condition is called Cushing's syndrome.

5 0
3 years ago
Mechanism with a small activation energy or one with large activation energy​
tangare [24]

Answer:

Rate depends on the rate constant. The rate constant depends on temperature and activation energy. If you have lower activation energy the rate will be higher. This is why catalysts are added since catalysts provide an alternate pathway that requires lower activation energy and catalysts are added to increase the rate of reaction.

Explanation:

This is only the answer if you were asking:

"Which corresponds to the faster rate: a mechanism with a small activation energy or one with a large activation energy?"

Thats what I understood about your question.

8 0
3 years ago
Buddhism was first brought to China via the
Firdavs [7]

Answer:

In the 1800s era

3 0
3 years ago
Read 2 more answers
Other questions:
  • A gas has a pressure of 50.0 mmHG at a temperature of 540 K. What will be the temperature if the pressure goes down to 3 mmHg?
    13·2 answers
  • What is the ground-state electron configuration of the fluoride ion F−? Express your answer in condensed form, in order of incre
    14·1 answer
  • Preteins vary widely in structure, whereas nucleic acids have rather uniform structures. How do you account for this major diffe
    9·1 answer
  • What value must be known if the accuracy of an experiment is to be determined​
    13·1 answer
  • QUESTION 10
    6·2 answers
  • HELP!!!! I WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST
    13·1 answer
  • What affects the nervous system? and how does it affect the nervous system?
    10·2 answers
  • Pick the correct answer!
    11·1 answer
  • Write the name for: Mg3O2
    5·1 answer
  • How many molecules of SF6<br> are in 25.0 g SF6?<br><br> [ ? ]×10⁰²] molecules SF6
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!