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
PilotLPTM [1.2K]
3 years ago
12

An unknown mineral scratches apatite and is scratched by corundum. What can you conclude about this mineral’s hardness?

Biology
2 answers:
Gala2k [10]3 years ago
8 0

If we guide ourselves with the Moh´s scale:

Material scratches apatite → material is harder than 5.

Material is scratched by corundum → material is softer than 9.

Conclusion:

The hardness of the unknown material stands between 5 and 9.

Note:  

Both apatite and corundum are defining materials (reference materials in the Moh´s scale). So, you can also give an answer using defining materials:

"It can either be an orthoclase feldspar, a quartz or a topaz".

Hope it helped,

BiologiaMagister

<u><em>This answer is dedicated to JaySL</em></u>

stiks02 [169]3 years ago
5 0

Answer:

the hardness is more than 2.5

Explanation:

You might be interested in
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of
yanalaym [24]
The correct answer is Protozoans.
Protozoans are best described as uni-celled eukaryotic organisms, both free-residing or parasitic, which feed on organic matter together with different microorganisms or organic tissues and particles. back then, the protozoa have been seemed as "one-celled animals," because they regularly possess animal-like behaviors, together with motility and predation, and lack a mobile wall, as discovered in plant life and plenty of algae.
4 0
3 years ago
Each homoglobin molecule contains?
ASHA 777 [7]

Hey here is the answer,

It is a globular protein, it contains one iron atom, that can bind one oxygen molecule. Therefore it has high affinity for oxygen.

Hope this helps you...

3 0
3 years ago
Prompt
Orlov [11]

Answer:

Energy in an ecosystem is mainly made by the producers of an ecosystem. The net primary productivity in an ecosystem depends on many factors. Some of them are:

  • Amount of sunlight: The amount of sunlight that the plants and trees might be has basic influence on the primary productivity. Plants and trees receiving enough sun light will be able to make more food for organisms living in that area as compared to the producers which do not receive enough sun light.
  • Soil texture: The soil texture and the availability of nutrients heavily influence the primary productivity of an ecosystem. An area having a soil texture with not enough nutrients will not be able to grow more plants. As a result, the productivity would decrease.

5 0
2 years ago
Which equation represents Newton's second law of motion in terms of momentum?
kogti [31]
F • t = m • v

Momentum = mv
3 0
2 years ago
What type of mountains are the cascade mountains
rewona [7]
The cascade mountains are tall mountains
4 0
2 years ago
Read 2 more answers
Other questions:
  • It is the most common metrical pattern in English poetry.
    14·1 answer
  • Respiration is a way torelease carbon back into the atmosphere. BLANK removes carbon from the atmosphere.
    14·1 answer
  • How does wound healing relates to cell division ( i need a paragraph pleasee)<br> HELP ASAP
    7·1 answer
  • To test how fertilizer affects tomato plants, a farmer divided a field of young tomato plants into 10 plots of equal size. The f
    11·1 answer
  • Approximately how many mutations occur naturally in DNA per 10,000 bases?
    13·1 answer
  • I’m doing an experiment on the correlating between age of compost and the height of plants, which graph is best a line graph or
    11·1 answer
  • Is a process that creates a new organism by combining the genetic material of two organisms.
    8·1 answer
  • A wave with a height of a 5 feet and a wavelength of 15 feet has a wave base of
    15·2 answers
  • Help me....................​
    14·1 answer
  • Which is NOT Part of the Cell Theory
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!