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
sertanlavr [38]
2 years ago
14

Though a needle is several times as dense as water, a small needle can be made to float on the surface of water if placed carefu

lly.
a) What could be the reason?
b) Why does a water drop assume spherical shape?
Plastics played an important role in forest conservation. Substantiate the statement.
Chemistry
2 answers:
Alinara [238K]2 years ago
5 0
I believe your answer is B
viva [34]2 years ago
3 0
The water is more dense than the needle so it can withstand the weight. It is the contraction of the water falling faster than the others forming a drop pattern or the water getting smaller so the top looked smaller.
You might be interested in
Which of the following models a single replacement reaction? ​
koban [17]
The correct answer would be option 3. I order for a single displacement to occur there must be a single element and one compound. From then, the single element will then swap places with one of the elements in the compound (or in this case single circle and combined circles). Hope this helped!
5 0
2 years ago
A 2.950×10−2 M solution of glycerol (C3H8O3) in water is at 20.0∘C. The sample was created by dissolving a sample of C3H8O3 in w
11111nata11111 [884]

Answer:

The molality of the glycerol solution is 2.960×10^-2 mol/kg

Explanation:

Number of moles of glycerol = Molarity × volume of solution = 2.950×10^-2 M × 1 L = 2.950×10^-2 moles

Mass of water = density × volume = 0.9982 g/mL × 998.7 mL = 996.90 g = 996.90/1000 = 0.9969 kg

Molality = number of moles of glycerol/mass of water in kg = 2.950×10^-2/0.9969 = 2.960×10^-2 mol/kg

7 0
3 years ago
What is 25mg in grams
Viktor [21]
Kilo
hecto
deca
base
deci
centi
milli



king Hector died by drinking chocolate milk

25 milligrams equal 0.025 grams

4 0
3 years ago
Which statement best explains why gneiss is composed of layers but there are no layers in granite?
Mandarinka [93]

Gneiss is a sedimentary rock and granite is a metamorphic rock.

<h3>What are rocks?</h3>

Rocks are geological hard materials that are made up of various types which include:

  • Sedimentary rocks: These are rocks that made up of various layers formed from sediments. Example is the gnesis.

  • Metamorphic rocks: These are rocks that are form from pre existing rocks that undergoes some transformation. Example is granite

Therefore, Gneiss is a sedimentary rock and granite is a metamorphic rock.

Learn more about rocks here:

brainly.com/question/398139

#SPJ1

8 0
2 years ago
Which of the following is not an example of a science?
Cloud [144]
Geology is the science of Earth.

Ecology is the science of relationship between an organism and its environment.

Astronomy is the science of studying astronomical objects.

Whereas, Phrenology is the study of relating the size of human skull like its size, shapes e.t.c to his/her personality. So, its not a science as there is no scientific relationship between it.
6 0
3 years ago
Other questions:
  • What is the molarity of a solution made by dissolving 18.4 g of potassium perchlorate in enough water to fill a 300.00 mL volume
    10·1 answer
  • Solve using significant figures <br> 8.647 + 45.969
    15·2 answers
  • What is the factor in deterring the average atomic mass of an element
    5·1 answer
  • Convert 14 millimeters to it equivalent in meter
    15·1 answer
  • For the following reaction, 3.70 grams of oxygen gas are mixed with excess carbon monoxide . The reaction yields 8.25 grams of c
    15·1 answer
  • CH4 +202 — CO2 + 2H2O
    12·1 answer
  • The photo shows an old-fashloned mercury thermometer. Mercury is a liquid metal that expands when It Is heated. Mercury Narrow t
    9·2 answers
  • Thats ridiculously ridiculous
    6·1 answer
  • A Write a set of four quantum numbers possible for the circled electron in arsenic (As). (There could be more
    6·1 answer
  • Please help me with this
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!