Answer:
a
Explanation:
The given statement if i post a image on social media at 7:00 pm, then ill get the most likes is a hypothesis.
What is hypothesis?
Hypothesis can be defined as an assumption which is made for the sake of argument . It is an interpretation of a practical condition for which action needs to be taken.It is defined as a tentative assumption which is made to test logical consequences.It is an antecedent clause of a statement which is conditional.
It is constructed before research. There are six types of hypothesis 1)simple hypothesis 2) complex hypothesis 3) directional hypothesis 4)non-directional hypothesis 5) null hypothesis 6)casual hypothesis
The hypothesis should be clear and precise, it must be specific and way of explanation of hypothesis should be simple.
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Carmen has a sample of matter. It is clear and smells sour. The sample is also thick but it flows when poured. Which is the best conclusion about Carmen's sample?
Answer:
liquid
Explanation:
In the given context, the sample as collected by Carmen is clear and the sample has a sour smell. It is also mentioned that the sample is thick sample and when the sample is poured on a surface it begins to flow.
Such a sample would be a liquid sample because anything that flows is a liquid. The liquid sample has a high viscosity since it is thick.
Answer:liquid
Explanation:
Because it flows
A car accelerates from 0 to 72 km/hour in 6.0 seconds. What is the car's acceleration?
The acceleration of the car is equal to 3.33 m/s² with a velocity of 72 Km/hr.
What is acceleration?Acceleration can be demonstrated as the rate of change of velocity over time. The acceleration can be explained as vector quantity due to both magnitude and direction. Acceleration is defined as the 2nd derivative of the position of the object w.r.t. time.
According to Newton's 2nd law of motion, the force exerted is equal to the mass times of acceleration of an object.
a = F/m
or, a = dv/dt
Given, the final velocity of the car, v = 72 Km/hr
v = 72 × 1000/3600 m/s
v = 20 m/s
The time is taken by car to travel, t = 20 s
The acceleration of the car, a = (20 - 0)/(6 - 0)
a = 3.33 m/s²
Therefore, the acceleration of the car is 3.33 m/s².
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HELP!!! Please answer.
Answer:
Magnesium dichloride
Explanation:
how do i convert 0.5L to mL
Answer: 500
Explanation: there's 0.001L in every mL. Divide the mL
by 1000 or multiply the liter by 1000.
Which substance is composed of only one type of atom? A: water B: sugar C: salt D: gold
Answer:
Gold
Explanation:
water = H2O(3 atoms)
Sugar = C12H22O11 (45 atoms)
Salt = NaCl ( 2 atoms)
Gold = Au ( 1 atom)
A substance that is composed of only one type of atom is gold. Thus, the correct option for this question is D.
What is an atom?An atom may be defined as the smallest unit of any matter that has the ability to form a chemical element. An atom may also be characterized as a particle of matter that uniquely illustrates a chemical element.
Water is composed of two atoms which are hydrogen and oxygen. Its chemical formula is [tex]H_20.[/tex] Sugar is a complex compound that consists of atoms of Carbon, hydrogen, and oxygen. Its chemical formula is [tex]C_6H_1_2O_6.[/tex] Salt typically consists of atoms of sodium and chlorine. Its chemical formula is NaCl.
Therefore, gold is a substance that is composed of only one type of atom. Thus, the correct option for this question is D.
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Which structure represents the cytosol within the cell
Answer:
In the eukaryotic cell, the cytosol is surrounded by the cell membrane and is part of the cytoplasm, which also comprises the mitochondria, plastids, and other organelles (but not their internal fluids and structures); the cell nucleus is separate. The cytosol is thus a liquid matrix around the organelles.
Answer:
C
Explanation:
answer on khan
Which types of native organisms do feral hogs most likely compete with for food sources?
Answer:
Here...
Explanation:
The feral hogs are most likely to compete with Herbivore and Carnivor for food sources. Option C is correct.
Herbivore:It is a type of food habit or nature in which an animal only eats plant or plants derived products.
For example Deer, Cows, etc.
Carnivorous:It is a type of food habit or nature in which an animal only eats other animal or animal-derived food.
For example- Lion, tiger, etc.
Since, feral hogs are omnivores who can eat both small animals and plants,
Therefore, the feral hogs are most likely to compete with Herbivore and Carnivor for food sources.
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True or False? Nitrogen can get back into the atmosphere when dead plants and animals are decomposed by bacteria. The bacteria break down the larger molecules into smaller ones including nitrates, ammonia, and ultimately N2. True or Fralse
Answer: True
Explanation:
Answer:
idkkkkkkkklkllkkkkkkkkkkkkkk
Which pair of elements in the diagram is most likely to form a covalent bond?
Answer:
This question is incomplete
Explanation:
This question is incomplete. A covalent bond is a bond that involves the sharing of valence electrons (shared pair) by two atoms of the same/different elements/compounds. The electrons (valence) that are involved in covalent bonding are not the ones in pairs (lone pairs) on the outermost shell of the atom. For example, the single electron on a hydrogen atom is shared with another hydrogen to form hydrogen gas (H₂).
Another example is when the two individual/unpaired electrons on the outermost shell of an oxygen atom binds with two other unpaired electrons on the outermost shell of another oxygen atom.
Another example is when two different electrons from two hydrogen atom binds singly with the two unpaired electrons on the outermost shell of an oxygen atom to form water.
The diagram in the attachment provides illustration on the examples given.
HELP PLZ !!!!! !!!!
Which of these is a sedimentary rock?
A) Granite
B) Obsidian
C )Quartzite
D) Sandstone
Answer:
D
Explanation:
What SI units are used for measuring the following quantities? For derived units, express your answers in terms of the six fundamental units. please help :(
volume, density, and energy
Answer:
volume it's SI unit is cubic centimeters or cubic meters
density grams per cubic centimeters
Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical formula of the compound formed by oxygen and cesium.
Answer:
Most similar ----- Lithium
Least similar ---- Nitrogen
Explanation:
Cesium is an element on the periodic with the atomic number 133. It lies in group 1 (i.e., the alkali metals) and period 6 on the periodic table. The oxidation state of group 1 metals is +1. Cesium forms an oxide with oxygen as [tex]Cs_2O[/tex].
The most similar compound to this chemical compound is Lithium because Lithium happens to be in the same group one metal with Cesium and forms the compound [tex]Li_2O[/tex] with the oxygen
The least similar compound nitrogen due to fact that it is an oxide that is covalent in nature and lies between-group 3 -17 to form an [tex]NO_2[/tex] with oxygen.
7. A square chunk of plastic has a length of 5 cm, width of 5 cm and height of 5 cm. It has a mass of 200 g. What is its density?
Answer:
[tex]d=1.6\ g/cm^3[/tex]
Explanation:
Given that,
The dimension of a square chunk of plastic is 5 cm × 5 cm × 5 cm
Mass, m = 200 g
We need to find its density
Density = mass/volume
It will form a cube. It volume = side³
So,
[tex]d=\dfrac{200\ g}{5^3\ cm^3}\\\\d=1.6\ g/cm^3[/tex]
Hence density is [tex]1.6\ g/cm^3[/tex]
Using microorganisms to break down pollutants into nontoxic organic matter is called? a. bioremediation b. phytoremediation c. biconcentration d.bioaccumulation
Answer:
bioremediation
Explanation:
Betty drew the life cycle of a butterfly for a science exhibition. The life cycle showed the various stages of growth before the egg turns into a butterfly. What type of model did Betty use?
Answer:
Conceptual
Explanation:
A conceptual models are graphical representation of the biological or physical system or another natural phenomenon. It is helping people to understand, imitate and make connections with natural phenomena. The given situation is an example of a conceptual model because it is represented in a graphical way and represents the basic biological events of the actual transformation of a butterfly (transforming a young adult insect into a young adult worm).Answer:
Conceptual
letter B
Given 1 cm3 = 1 mL
A box has dimensions 2.0 cm x 4.0 cm x 8.0 cm.
Answer: 64
Explanation:
you just multiple the 3 numbers to get the answer (i’m in chemistry and just did this question lol)
Compare which element would have larger first ionization energy: an alkali metal in Period 2 or an alkali metal in Period 4?
AW: I think it would be alkali metal on period 2
Answer:
An alkali metal present in period 2 have larger first ionization energy.
Explanation:
Ionization energy:
The amount of energy required to remove the electron from the atom is called ionization energy.
Trend along period:
As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
Trend along group:
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
As the size of atom increases the ionization energy from top to bottom also decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus. Thus alkali metal present in period 2 have larger ionization energy because of more nuclear attraction as compared to the alkali metal present in period 4.
Gases deviate from tidal gas behavior because their particles:
Answer:
Explanation:
At low temperatures or high pressures, real gases deviate significantly from ideal gas behavior.
The kinetic theory assumes that gas particles occupy a negligible fraction of the total volume of the gas. It also assumes that the force of attraction between gas molecules is zero.
I hoped I helped you! :)
dimensional analysis 9 lemons = 1 orange How many lemons in 10 oranges?
When heating test tubes, always slant them away from yourself and others.
True
False
Answer:
true
Explanation:
What makes one atom different from another? The number of______in the_____
Answer:
protons in the nucleus
Hydrogen atoms and helium atoms are not the same.
True
False
Answer: The answer is False (No). All helium atoms have 2 protons in their nucleuses (nuclei). If an atom has only 1 proton it its nucleus, then it is a hydrogen atom. (it behaves like other hydrogen atoms, not like a helium atom.)
Answer:
FALSE
Explanation:
The answer is False (No). All helium atoms have 2 protons in their nucleuses (nuclei). If an atom has only 1 proton it its nucleus, then it is a hydrogen atom. (it behaves like other hydrogen atoms, not like a helium atom.)
If some paper and/or paper-like materials ignite and cause a very small fire at your lab table, you should?
Answer:
Tell your instructor immediately
What is the main source(s) of energy for all living things?
Answer:
The sun
Explanation:
All living things get energy from different sources (a cow gets it from grass, dog gets it from meat), but eventually, most energy on Earth comes from the Sun. Plants use it to perform photosynthesis, other organisms eat plants, and so on!
What are the Oxidation numbers for H2AsO4-
i cant understand your question define briefly
How many electrons are found in a C and O2-, respectively?
Answer:
For example: O2- indicates an ion of oxygen having two extra electrons. I.e., since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).
Carbon has a total of six electrons and there are a total of ten electrons in the oxygen ion.
What we can easily find in common with carbon and oxygen atom is the fact that the both of them have two shells. We can also refer to these shells as energy levels.
In both atoms, the first shell contains only two electrons. For carbon, the second shell contains four electrons while the second shell of oxygen ion contains eight electrons.
Hence, Oxygen ion has two electrons in the first shell and eight electrons in the second shell(total of ten electrons) while carbon has two electrons in the first shell and four electrons in the second shell (a total of six electrons).
The electronic configuration of carbon is: 1s2, 2s2, 2p2
The electronic configuration of oxygen ion is: 1s2, 2s2, 2p6
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(a) Convert the following:
50 cm into m
Answer:
0.5m
Explanation:
Scientists are studying cell-to-cell communication in a human spleen.
How would scientists most likely use technology during this study?
to draw a diagram showing how cellular communication occurs
to predict what triggers cells-to-cell communication
to determine safety procedures to be used in the laboratory
to determine the number of visible cells by counting them
Answer:
To predict what triggers cell-to-cell communication
Explanation:
Methodologies used for studying cell-to-cell communication includes
1) The reductionist method in which cellular response are measured based on testing specific cellular signals by the introduction of different chemicals, so as to find the source that triggers the response
2) By the application of known chemical reagents enable or block specific areas of an organism's receptors and with the aid of an electrode measure the cellular response based on generated currents of ions or by collecting and analyzing fluid samples from the affected area.
Answer:
b
Explanation:
just took test
Which are characteristics of all living things? Check all that apply. are made of cells need energy A. can breathe B. respond to stimuli C. can reproduce D.grow and develop / help me please
Answer:
All can be charactoristics of a living thing
Explanation:
Answer:
Grow
Need energy
respond to stimuli
are made of cells
Explanation:
correct on edge 2022 :)
brownie mix a homogeneous or a heterogeneous mixture
pls helpppp