Answer: A
Explanation:
Robert Hooke discovered the cell. Cells are the highest level of organization in a living organism. so, option A is correct.
What is cell ?Cell is the smallest unit that can sustain life on its own and makes up all living things, including the body's tissues. It is a small unit of organism containing nucleus.
The cell membrane, the nucleus, and the cytoplasm are the three primary components of a cell. The cell membrane encloses the cell and regulates how substances enter and exit the cell.
After using a very early microscope to examine a piece of cork, Robert Hooke proposed the name "cell" in 1665, derived from the Latin cella, which means "storeroom or chamber." It is also claimed that he believed the rectangular chambers to resemble some monastic cells.
Thus, option A is correct.
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whai is the maining of science?
Answer:
the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
Explanation:
sxty-D
1. What fraction of the elements on the periodic table are metals?
Answer:
80%
Explanation:
What is the last sequence for Silver
4d7
4d7
4d9
4d9
4p2
4p2
3d7
Answer:
4d₉
Explanation:
Silver is atomic number 47, Ag. So, count to 47 in orbitals:
1s₂ 2s₂ 2p₆ 3s₂ 3p₆ 4s₂ 3d₁₀ 4p₆ 5s₂ 4d₉
2 + 2 + 6 + 2 + 6 + 2 + 10 + 6 + 2 + 9 = 47
This sequence ends in 4d₉, therefore it is the last sequence.
In a synthesis reaction, the elements Fe and S might react to form which of the following?
A. H20
B. FeS
C. Na and Cl
D. All of the above
Answer:
THE ANSWER IS A
Explanation:
In a synthesis reaction, the elements Fe and S might react to form FeS.
Given :
The elements Fe and S might react to form a product,
To find:
The product of the synthesis reaction.
Solution:
The synthesis reaction is a type of chemical reaction in which two more different substances are combined together to give a single product,
When iron (Fe) and sulfur react the product will be formed will have both iron atoms and sulfur atoms.
[tex]Fe+S \rightarrow FeS[/tex]
In a synthesis reaction, the elements Fe and S might react to form FeS.
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What is the difference between A and B? In your answer, describe the state of matter in each picture AND the key property of gas being shown.
For A it seems that the molecules are freely moving around and vibrating as well- indicates liquid. At B, the molecules are rigid with very less energy - indicating solid.
write a short note on the function of the Amino acid in human body.
Answer:
Hello
Amino acids function as the building blocks of proteins. Proteins catalyze the vast majority of chemical reactions that occur in the cell. They provide many of the structural elements of a cell, and they help to bind cells together into tissues.
Hope it helps you...
What my favorite food only question for JungKookLuver and jguzman577! Or if u answer I report you!
Answer: Pizza
Explanation: Pizza
Answer:
Shiver me timbers its pizza
Explanation:
Easy Question. Will mark brainliest
Carbon combines with oxygen to form two compounds, carbon monoxide and carbon dioxide. Based on the law of multiple proportions, describe how the proportions of oxygen in the two compounds relate to each other.
Answer:
Their components
Explanation:
It's simple enough, the components in carbon dioxide and carbon monoxide both have at least one carbon and one oxygen atom. However, they differ because their amount in the molecules is different, and that is because of their covalent bonds. Carbon dioxide has to double electron bonds while carbon monoxide has a rare triple electron bond.
In a decomposition reaction, NaCl might form which of the following?
A. H20
B. FeS
C. Na and Cl
D. All of the above
Answer:
THE ANSWER IS C
Explanation:
In a decomposition chemical change, NaCl might form sodium and chlorine , hence option C is correct.
What is a chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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what is gravity and weight please answer
Weight is the force of gravity on an object. Weight depends on the strength of the gravitational field the object is in and the mass of the object. ... Mass is constant anywhere in the universe, whereas weight depends on the gravity where the object is present (Earth, the moon, Jupiter, etc.).
Which atom has only one pair of electrons in its outermost energy level?
a. Boron b. carbon c. nitrogen d. oxygen
Answer:
i belive A, i cold be wrong tho, pls tell me if im right if you fully find out
ght. Explanation:
What color of light has the wavelength 5.6 x 10 -7 meters
Answer:
49
Explanation:
i multiply 5.6 times 10 and mines 7
________ is a trend making computers ubiquitous?
Answer:
Pervasive computing, also called ubiquitous computing, is the growing trend of embedding computational capability (generally in the form of microprocessors) into everyday objects to make them effectively communicate and perform useful tasks in a way that minimizes the end user's need to interact with computers as ...
Explanation:
How are the molecules in a substance behaving if a great deal of thermal energy has transferred away from it through conduction?
Answer:
the molecules would be slowing down
Explanation:
Answer:
they'd slow down durr
Explanation:
If you have six molecules of CO2how many oxygen atoms do you have?
how many grams of S are in 665 g of SO2
Answer: 111g S
Explanation:
SO2 you have = 665 g
SO2 molar mass = 64.066 g/mol
S molar mass = 32.065 g/mol
[tex]665g SO2*\frac{1 molSO2}{64.066gSO2} *\frac{1molS}{3molSO2} * \frac{32.065gS}{1molS} = 110.944... ~ 111gS[/tex]
There are 332.5 grams of S (sulfur) in 665 g of SO2 ( sulfur dioxide).
From the information given:
The atomic mass of sulfur = 32 g/mol
The atomic mass of oxygen = 16 g/mol
∴
The molar mass for SO2 = 32 + (16 × 2) g/molThe molar mass for SO2 = 64 g/molSince there are 665g of SO2;
If 1 mole of SO2 contains 1 mole of S
It implies that:
(1 × 64)g of SO2 will contain (1 × 32) g of S;
∴
665 g of SO2 will contain :
[tex]\mathbf{= \Big ( \dfrac{1 \times 32}{1 \times 64} \times 665 \Big )}[/tex]
= [tex]\mathbf{\Big 332.5 \ grams \ of \ S \Big}[/tex]
Therefore, we can conclude that there are 332.5 grams of S present in 665 g of SO2.
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If it takes a Sonar echo 8 seconds to reach the bottom of the ocean and return and we know that the speed of sound is 1500 meters per second, how far away is the bottom of the ocean?:
A) 4000 meters
B) 8000 meters
C) 6000 meters
D) 1200 meters
Answer:
C) 6000 meters.
Explanation:
Hello.
In this case, since the speed is computed as the distance divided by the time to attain such displacement:
[tex]s=\frac{d}{t}[/tex]
Knowing that the speed is 1500 m/s and the required time is 4 s because is the half of the described travel, the distance is then:
[tex]d=s*t\\\\d=1500m/s*4s\\\\d=6000m[/tex]
Therefore, the answer is C) 6000 meters.
Best regards.
Answer:
600 meters i took test ;)
Explanation:
Descibe how electronegativity and molecular shape determine the polarity of a molecule. Then describe why chemists consider relative electronegativity values and not absolute electronegativity values when determining the polarity of a bond. Also explain how a molecule with polar bonds can be non-polar overall.
Answer:
See explanation
Explanation:
Electronegativity is an idea put forward by Linus Pauling to explain the fact that in a molecule, one atom may attract the shared electrons of the bond closer to itself than the other.
Hence electronegativity is defined as the power of an atom in a molecule to attract electrons to itself.
Pauling originally described electronegativity as a relative quantity. It depends on the electronegativities of the atoms in the molecule. However, some methods have sought to measure the absolute electronegativity of a free atom.
A bond is polar when the atoms that make up the bond have a significant difference between the atoms of the molecule.
However, a molecule may possess polar bonds but may not have an overall dipole moment owing to the shape of the molecule.
For instance, CCl4 has four polar C-Cl bonds but the overall molecule is non polar because due to the fact that the molecule is tetrahedral in shape and highly symmetrical hence the individual dipoles cancel out.
A balance reads an object A to be 45.1 kg. The balance reads another object B to be 33.46 kg. What is the total weight of both objects
Answer:
The total weight of both object is 78.56 kg.
Explanation:
Given data:
Mass of object A = 45.1 kg
Mass of object B = 33.46 kg
Total weight of object = ?
Solution:
Total weight of both subject must be the sum of weight of object A and B.
Total weight of objects = weight of object A + weight of object B
Now we will put the values of mass of object A and B.
Total weight of objects = 45.1 kg + 33.46 kg
Total weight of objects =78.56 kg
Thus the total weight of both object is 78.56 kg.
What type of energy is stored in fuels such as gasoline and batteries
Answer:Chemical energy
Explanation:Chemical energy is energy stored in the bonds of atoms and molecules. Batteries, biomass, petroleum, natural gas, and coal are examples of chemical energy. Chemical energy is converted to thermal energy when people burn wood in a fireplace or burn gasoline in a car's engine.
The type of energy which is stored in fuels such as gasoline and batteries is chemical energy.
What is chemical energy?
Energy which is stored in the chemical bonds of chemical compounds is called chemical energy.Chemical energy is released during the occurrence of chemical reaction.Reactions wherein energy is given out in the form of heat is called exothermic reactions.
Chemical energy can be converted to other forms of energy like electrical energy during the process of electrolysis and to thermal energy as in the case of thermal engines.
It can also be converted to kinetic energy during explosions . It is stored in batteries, coal, biomass, food, vehicle air bags,etc.
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a wavelength of 4.73 x 10-7 m, and a frequency of
Answer:
Frequency =0.634×10¹⁵ s⁻¹
Explanation:
Given data:
Wavelength = 4.73×10⁻⁷ m
Frequency = ?
Solution:
Formula:
speed of light = wavelength× frequency
speed of light = 3×10⁸ m/s
Now we will put the values in formula.
3×10⁸ m/s = 4.73×10⁻⁷ m × frequency
Frequency = 3×10⁸ m/s /4.73×10⁻⁷ m
Frequency =0.634×10¹⁵ s⁻¹
s⁻¹ = Hz
Frequency =0.634×10¹⁵ Hz
Antonio and his friend found a piece of metal which they want to identify. Here is what they figure out so far: Mass of this metal is 20g Volume of this metal is 2.35cm3
Answer:
The density of beryllium copper is 8.5 g/cm³ thus given metal is beryllium copper.
Explanation:
Given data:
Mass of metal = 20 g
Volume of metal = 2.35 cm³
Which metal is this = ?
Solution:
we will apply density formula to solve this problem.
d = m/v
d = density
m = mass
v = volume
d = 20 g/ 2.35 cm³
d = 8.5 g/cm³
The density of beryllium copper is 8.5 g/cm³ thus given metal is beryllium copper.
what energy transformations does microwave have
Answer:
radiant energy
Explanation:
microwaves convert electrical energy into radiant energy
Which of the following is an example of an endothermic reaction?
!!! thank u!!
Answer:
Combustion
Explanation:
why are divergent boundaries are also called a constructive boudary
Answer: Divergent boundaries are where two of those plates are moving away from each other. They are called constructive plates because when they move apart, magma rises up in the gap- this forms volcanoes and eventually new crust.
Explanation:
Which of the following has thermal energy?
A. Both a piece of metal that feels hot and a piece of metal that feels cold.
B. A piece of metal that feels hot but not a piece of metal that feels cold
C. A piece of metal that feels cold but not a piece of metal that feels hot
D. Neither a piece of metal that feels hot nor a piece of metal that feels cold
What is the most strongest material bedrock Obsidian or diamond
what I do when I need to eat
The element Aluminium (AI) Is
Answer:
a metal which is found in 13 group and 3 period of periodic table
What do you suppose is the reason and what do you need to do.
Answer:
You have to add many things
Explanation:
for example u can add why and how also what ur point is