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
Slav-nsk [51]
2 years ago
15

(worth 30 points)Next Sandra tests the hardness of each mineral by scratching it with different materials as shown in the chart.

The values in the chart are based on the Mohs Scale of hardness, which ranks the hardness of minerals on a scale of 1 to 10. The harder the mineral is, the higher its rating will be. If the material is harder than the mineral, it will scratch the mineral. For example, according to this scale, if a mineral is unable to be scratched by a steel nail, then the mineral has a hardness greater than 6.5.
History
1 answer:
Masja [62]2 years ago
7 0

Answer:

Mohs hardness, rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised (1812) by the German mineralogist Friedrich Mohs. The Mohs hardness of a mineral is determined by observing whether its surface is scratched by a substance of known or defined hardness.

Related Topics: hardness

To give numerical values to this physical property, minerals are ranked along the Mohs scale, which is composed of 10 minerals that have been given arbitrary hardness values. The minerals contained in the scale are shown in the Table; also shown are other materials that approximate the hardness of some of the minerals. As is indicated by the ranking in the scale, if a mineral is scratched by orthoclase but not by apatite, its Mohs hardness is between 5 and 6. In the determination procedure it is necessary to be certain that a scratch is actually made and not just a “chalk” mark that will rub off. If the species being tested is fine-grained, friable, or pulverulent, the test may only loosen grains without testing individual mineral surfaces; thus, certain textures or aggregate forms may hinder or prevent a true hardness determination. For this reason the Mohs test, while greatly facilitating the identification of minerals in the field, is not suitable for accurately gauging the hardness of industrial materials such as steel or ceramics. (For these materials a more precise measure is to be found in the Vickers hardness or Knoop hardness) Another disadvantage of the Mohs scale is that it is not linear; that is, each increment of one in the scale does not indicate a proportional increase in hardness. For instance, the progression from calcite to fluorite (from 3 to 4 on the Mohs scale) reflects an increase in hardness of approximately 25 percent; the progression from corundum to diamond, on the other hand (9 to 10 on the Mohs scale), reflects a hardness increase of more than 300 percent.

You might be interested in
Explain the social, political, and economic causes of the American Revolution
Elena-2011 [213]

Answer:

Explanation:

So, the question is, what is Mercantilism?

Simply, Mercantilism is a policy, through which a country tries to protect its own businesses from the competition with other countries.

This policy encourages maximizing export and minimizing imports.

During the colonial era, countries like France, Great Britain implemented it using their political authority.

So, now let’s come back to our own topic.

Far around hundred years before the rebellion began, in the years 1651, 1660, and 1663 the English parliament passed some acts, popular as the ‘Navigation Acts’ in history.

As per those acts, only British ships were allowed to bring goods to the 13 colonies of America.

8 0
2 years ago
Who was president during the iran hostage crisis
loris [4]

Answer:

8888888

Explanation:

6 0
3 years ago
PLEASE HELP!!
Verdich [7]

a. The relationship increased because of the support from Protestant churches.

the Great Awakening affected the colonies by changing many people's attitudes towards religion. Before this revival, religious devoutness had been fading in the colonies. The revival movement undyingly impacted Protestantism as adherents strove to renew individual piety and religious devotion.

3 0
2 years ago
Read 2 more answers
6. The Maya lived in a challenging territory, some places had thick forests, some areas had swamps and
Kamila [148]

Dangerous wild animals, food shortage and difficulty in movement are the various problems experience by Maya,

Various problems experience by the Maya in the area such as thick forests in which they can't find the way as well as wild animals and insects which attack on them. In swamp areas, it was hard for them to move due to water as well as alligators in them that is very dangerous and in the dry regions, there is no water and vegetation which makes the life more difficult for them. There is food scarcity in these dry regions and the people experience difficult days there.

brainly.com/question/24370335

3 0
2 years ago
PLEASE HELP
frozen [14]

Answer:

Embassies are kinda like mini countries in themselves. It would be the same with the foreign official trying to go the United States itself.

Explanation:

4 0
3 years ago
Other questions:
  • The standard of living in the United States after world war 2 were
    5·1 answer
  • Am I right or is the answer A
    8·2 answers
  • What was one consequence of the October Revolution?
    7·2 answers
  • HURRYYY!!!
    8·2 answers
  • What role does the US constitution play in creating local governments
    7·2 answers
  • Why was the English Bill of Rights written? What ideas did our founders get from the English Bill of Rights that we see in our g
    7·1 answer
  • Make x the subject of m=n +<br>x/p​
    14·1 answer
  • What obstacles did the slaves confront in constructing communities?​
    9·2 answers
  • How did the native Americans react to the westward expansion and American system
    9·2 answers
  • RESEARCH TOPIC
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!