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
Marianna [84]
2 years ago
10

Allen pours water into a graduated cylinder. He notices that the surface of the water is curved, as shown below.

Biology
2 answers:
Slav-nsk [51]2 years ago
4 0

Answer:

When water is added to a graduated cylinder, having a surface where the sides of the water look higher than the center means that the curved surface is a concave meniscus which has formed because of surface tension (Choice C).

Explanation:

A meniscus is simply the curvature that the surface of a liquid acquires when it is in a container, such as a graduated cylinder. It is concave when there is attraction between molecules -water and glass- or it can be convex when both surfaces are repelled.

<u>Water is a polar molecule</u>, with the capacity to adhere to the surfaces it comes into contact with. This characteristic causes it to form a concave meniscus, as the outermost molecules adhere to the glass surface, while the surface tension of the water attracts the molecules from the centre downwards, causing the concavity.

Learn more:

Measuring with a graduated cylinder brainly.com/question/4070509

Wittaler [7]2 years ago
3 0

Answer:

is A

Explanation:

Which of the following identifies this phenomenon and explains how it is formed?

Choose 1 answer:

(Choice A, Checked, Correct)

CORRECT (SELECTED)

The curved surface is a concave meniscus which has formed because of capillary action.

Capillary action occurs because the water molecules are more attracted to the cylinder than they are to each other. This causes the upward movement of the water along the sides of the glass, forming a curved surface called a concave meniscus.

You might be interested in
I will give you Brainliest if you answer this problem!
HACTEHA [7]

Answer:

Complete the following problems using the equation:

Students are not required to memorize this formula but must know the meaning of the symbols:

D = diversity index

N = total number of organisms of all species found

Σ = the sum of

n = number of individuals of a particular species

D is a measure of species richness. A high value of D suggests a stable and ancient site, and a low value of D could suggest pollution, recent colonization or agricultural management. The index is normally used in studies of vegetation but can also be applied to comparisons of animal (or even all species) diversity.

Example: A lake contains 934 brown trout, 733 smallmouth bass, 34 catfish, 2003 carp,

234 steelheads, and 32 northern pikes.

Fish

Number (n)

n(n-1)

Brown Trout

934

934 x (934-1) = 871422

Smallmouth Bass

733

733 x (732) = 536556

Catfish

34

34 x (33) = 1122

Carp

2003

2003 x (2002)=4010006

Steelheads

234

234 x (233)=54522

Northern Pike

32

32 x (31)=992

Total (N)

3970

= 5 474 620

= 3970 x 3969 = 15 756 930

D = = 2.88

Simpson’s Diversity Index – Practice Problems

When comparing two or more samples, the location with the larger D has a greater amount of diversity. Note that a higher total population does not indicate higher diversity.

An area of the Black Forest in Germany contains 134 pitch pines, 24 douglas firs, and 53 red pines.

A meadow contains 1532 chestnut oaks, 342 black cherry trees, 12 white ash trees, and 1022 yellow birches.

Your backyard contains 12 fleas, 34 aphids, 84 ants, 93 beetles, and 1 butterfly.

An African National Park contains 15 lions, 94 giraffes, 1000 wildebeests, 50 elephants, and 5 hyenas.

Mindo (a city in Ecuador) has 832 toucans, 392 red headed barbets, 3 golden headed quetzals, 500 tanagers, 899 parrots, and 50 white capped dippers.

Answer the following questions in your workbook:

Calculate Simpson’s diversity index for each location. Include the table in your workbook.

Distinguish the differences in diversity between two locations listed above.

Explain what may lead to those differences.

Outline the significance of the Simpson’s Diversity Index. You may refer to the following online resource and your textbook to help outline your ideas - http://www.countrysideinfo.co.uk/simpsons.htm

5 0
2 years ago
Form a Hypothesis: As the map shows, the sickle cell allele is not found in African populations that are native to southern Afri
kati45 [8]

A hypothesis for this observation might be that malaria is not endemic to southern Africa. It is a plausible explanation of a given scientific question.

<h3>Hypothesis and scientific method</h3>

A hypothesis is a plausible explanation of an observation of the natural world, which must be tested by using the scientific method.

Testing a hypothesis involves performing additional observational and/or experimental procedures in order to confirm or reject this assumption.

In this case, the sickle cell allele is found in high frequency in regions where malaria is endemic.

Learn more about hypotheses here:

brainly.com/question/11555274

6 0
2 years ago
Will a person with cycloplegia have difficulty with near or distance vision? Explain
Lana71 [14]

Answer: Near

Explanation:

The paralysis of the ciliary muscle, the curvature of the lens can no longer be adjusted to focus on nearby objects when it is damaged or weakens throughout time.

5 0
2 years ago
Every november, tens of thousands of sally lightfoot crabs on christmas island leave their rain forest habitats at the same time
Charra [1.4K]
The type of fertilization that one would expect to find in this specie is EXTERNAL FERTILIZATION. External fertilization is the type of fertilization in which the male sperm fertilize the female eggs out of the female's body. This type of fertilization usually occur in aquatic environment. 
4 0
3 years ago
Read 2 more answers
In what basic settings do intrusive and extrusive igneous rocks originate
Hatshy [7]
Intrusive is crystallized below the surface
<span>extrusive is when lava crystallizes on earths surface</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • While you are speaking with a client diagnosed with gout, she states that she has no symptoms of the disease and asks you to exp
    10·1 answer
  • Why are most fertilizers rich in phosphorus<br>​
    7·1 answer
  • Which activity distinguishes the larva stage from the pupa stage of an insect?
    5·1 answer
  • The fungi Basidiomycota are often used for making _____.
    9·2 answers
  • Carbon is the element of
    7·1 answer
  • Where do organism obtain the energy they need
    7·2 answers
  • The ocean contains many plants and protists that can make their own food. What do these organisms get by living near the surface
    13·2 answers
  • is there a way to get ur roblo.x acount back when somone hac.ks ur acount and u dint put a email or phone number on the acount
    5·1 answer
  • Studying science will help make you a better member of society?
    11·2 answers
  • A thin, flexible square patch that continuously delivers hormones through the skin and into the bloodstream for a full 7 days to
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!