Express the diameter of a ground-state hydrogen atom.
Answers
The diameter of a ground-state hydrogen atom can be calculated using the Bohr radius (a0) which is approximately equal to 0.529 Å (angstroms) and the formula for the diameter of a sphere (2 × radius).
So for the ground-state hydrogen atom (n = 1), the radius (r) would be :
\(r = a0 / 1\)
= a0 The diameter of a sphere is 2 times the radius so the diameter of a ground-state hydrogen atom can be expressed as follows:
Diameter = 2 × radius
Diameter = 2 × a0
Diameter = 2 × 0.529.
Diameter = 1.058 Å
Therefore, the diameter of a ground-state hydrogen atom is approximately 1.058 angstroms. This process has significant applications in the food and beverage industry as well as in the production of biofuels.
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Related Questions
How many milliliters of 3.0 M H2SO4 are needed to make 450 mL of 0.10 M H2SO4?
Answers
Hypothesis: If you can measure the pH of a range of acids and bases using a universal pH indicator, then you can use those values to calibrate a cabbage pH indicator. To determine the pH of a solution using a pH indicator paper, you need a .
Answers
To determine the pH of a solution using a pH indicator paper, you need a color chart or a color scale that corresponds to different pH values.
This color chart or scale is used to compare the color of the pH indicator paper after it has been immersed in the solution. The pH indicator paper is impregnated with a universal pH indicator, which is a chemical compound that changes color depending on the acidity or alkalinity of the solution.
The indicator undergoes a chemical reaction with the hydrogen ions (H+) or hydroxide ions (OH-) present in the solution, resulting in a color change.
By comparing the color of the pH indicator paper with the color chart or scale, you can determine the approximate pH of the solution. The color chart usually provides a range of colors corresponding to different pH values, allowing you to match the observed color to the nearest pH value.
In the hypothesis mentioned, the aim is to calibrate a cabbage pH indicator using the pH values obtained from a universal pH indicator. Therefore, in addition to the pH indicator paper and color chart, you would also need a range of solutions with known pH values to establish a calibration curve specific to the cabbage pH indicator.
In summary, to determine the pH of a solution using a pH indicator paper, you need a color chart or scale that correlates the observed color of the pH indicator paper with different pH values. This chart or scale serves as a reference for interpreting the color change and determining the pH of the solution.
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Answer: COLOR KEY
Explanation: CS
w 17. Which of the following is the atomic number of a halogen? A. O 10 B. 136 C. 17 D. 13
Answers
Answer:
C. 17
Explanation:
The question above is related to the "Periodic Table of Elements." The Halogen group is located on the right side of the table. It consists of six elements: Fluorine, Chlorine, Bromine, Iodine, Astatine and Tennessine.
The "atomic number" of an element refers to the number of protons that can be found in the element's nucleus. Among the halogens, "Chlorine" is the only one with an atomic number of 17. Halogens do not have an atomic number of 10, 136 and 13.
When chlorine gas comes into contact with magnesium metal at high temperatures, solid magnesium chloride is created. Classify this reaction.
Answers
The formation of solid magnesium chloride (MgCl₂) by the reaction between chlorine gas (Cl₂) and magnesium metal (Mg) at high temperatures is classified as a synthesis reaction or a combination reaction.
Synthesis reactions involve the combination of two or more substances to form a single product. In this case, chlorine gas and magnesium metal combine to produce magnesium chloride as the sole product.
The balanced chemical equation for this synthesis reaction is:
Mg + Cl₂ ⇒ MgCl₂
Hence, the reaction between chlorine gas and magnesium metal to form solid magnesium chloride indicates a synthesis reaction, as the elements combine to form a compound.
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How many milliliters of \(H_{2}\) gas at STP are required to fully hydrogenate 1.68 g of \(C_{6} H_{8}N_{2}\) (adiponitrile) according to the following hydrogenation reaction scheme?
\(C_{6}H_{8}N_{2}(l) + 4H_{2}(g)\) → \(C_{6} H_{16}N_{2}(s)\)
Answers
Answer:
The answer is
21.5 L
.
So, start with the balanced chemical equation for the decomposition of hydrochloric acid
2
HCl
→
H
2
+
Cl
2
Notice that you have a
2:1
mole ratio between
HCl
and
Cl
2
, which means that every 2 moles of the former will produce 1 mole of the latter. The number of moles of
HCl
you have is.
Explanation:
I don't know if that is but I try my best just correct me if I'm wrong thank you!!
Place the characteristics for each phase of matter into the table where it belongs
Answers
Answer:
Solid- Definite shape
Solid and Liquid- Definite volume, Not easy to compress, if at all
Gas- No Definite Volume
Liquid and Gas- No Definite shape
The characteristics for each phase of matter in the table where it belongs are as follows:
Solids: Definite shape, very little particle motion. Liquids: Fluid motion. Gases: No Definite Volume, easily compressed. Solids and liquids: Definite volume, Not easy to compress, if at all. Liquids and Gases: No Definite shape, constant, fast particle motion. What are the different States of matter?The states of matter may be defined as the three distinct physical forms which matter can take in most environments. They are as follows:
Solid.Liquid.Gas.Each of the states of matter significantly possesses specific chemical and physical properties. For example, solids generally have a definite volume, are relatively rigid, and atoms or molecules are attached to each other very compactly.
Liquids possess a definite volume and have the ability to alter their shape through flowing. The atoms are loosely bonded to one another.
Gas has no definite volume or shape. This state of matter is easily compressed as well.
Therefore, the characteristics for each phase of matter in the table where it belongs are well described.
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The_____form acidic compounds with hydrogen.
Answers
Answer:Halogens
Explanation:
I looked it up lol
How are sugar molecules in living things classified? (6th grade science)
A) as proteins
B) nucleic acids
C) as lipids
D) as carbohydrates
Answers
Answer:
Traits of Collectivist Cultures
In collectivistic cultures, people are considered "good" if they are generous, helpful, dependable, and attentive to the needs of others. This contrasts with individualistic cultures, which often place a greater emphasis on characteristics such as assertiveness and independence
Explanation:
Answer:
D carbohydrates
Explanation:living things are made of four types of molecules, known as macromolecules: proteins, lipids (fats), carbohydrates (sugars) and nucleic acids (DNA and RNA). Each type of macromolecule is made of its own building blocks, which are connected like Legos to form different shapes.
Mark ran 5meters on Monday, 6meters on Tuesday and 7 meters on Wednesday. How many kilometers did Mark ran in total for the three days ? ( pay keen attention to the units)
a*18m
b*180m
c*1800km
d*18000km
e*0.018km
Answers
Answer: 18
Explanation: thats all
Answer:
Hi! Your answer here is e. 0.018km. The total number of meters Mark ran over the course of three days is 18. The problem asks that we convert this number to kilometers, and 18 meters is equivalent to 0.018 kilometers.
Have a great day! - Mani :)
What period has the highest ionization energy?
Answers
Answer:helium or the noble gases
Explanation: The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest ionizing energy
What does the cardiovascular system do
for the human body?
Answers
Answer: The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body.
Explanation:
What is the overall charge of the electron cloud of the atom? Explain.
Answers
Answer:
Explanation:
What does this mean? It means that there are Z positive nuclear charges, and this determines the identity of the element. If the element is neutral, this means that there are precisely Z electrons, and the overall electronic charge is −Z . And thus the net ELECTRIC charge of the ATOM is Z+(−Z)=0 , i.e. zero .Oct 3, 2016
what are the factors affecting gravity?
Answers
Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:
Mass: The most significant factor affecting gravity is the mass of the objects involved. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses. Greater mass leads to a stronger gravitational force.Distance: The distance between two objects also plays a crucial role in the strength of gravity. According to the inverse square law, the gravitational force decreases as the distance between objects increases. As objects move farther apart, the gravitational attraction between them weakens.Gravitational Constant: The gravitational constant, denoted by G, is a fundamental constant in physics that determines the strength of the gravitational force. It is a universal constant and does not change, affecting the overall magnitude of gravity.Shape and Distribution of Mass: The distribution of mass within an object can influence the gravitational field it generates. Objects with a more compact and concentrated mass distribution will have a stronger gravitational pull compared to those with a more spread-out mass distribution.External Influences: Gravity can be influenced by external factors such as nearby celestial bodies or the presence of other forces. For example, the gravitational interaction between the Earth and the Moon affects tides on Earth's surface.Find solutions for your homework
science
chemistry
chemistry questions and answers
given the following set of data, determine the enthalpy of formation of the nacl(s) from elemental na(s) and cl2(g) given the following information. lattice energy for solid nacl(s):-742kj/mol enthalpy of sublimation for solid na(s)->na(g):108kj/mol first ionization energy for sodium:496kj/mol cl-cl bond dissociation energy:75.3kj/mol electron affinity for
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Question: Given The Following Set Of Data, Determine The Enthalpy Of Formation Of The NaCl(S) From Elemental Na(S) And Cl2(G) Given The Following Information. Lattice Energy For Solid NaCl(S):-742kJ/Mol Enthalpy Of Sublimation For Solid Na(S)->Na(G):108kJ/Mol First Ionization Energy For Sodium:496kJ/Mol Cl-Cl Bond Dissociation Energy:75.3kJ/Mol Electron Affinity For
Given the following set of data, determine the Enthalpy of formation of the NaCl(s) from elemental Na(s) and Cl2(g) given the following information.
Lattice Energy for solid NaCl(s):-742kJ/mol
Enthalpy of sublimation for solid Na(s)->Na(g):108kJ/mol
First ionization energy for sodium:496kJ/mol
Cl-Cl bond dissociation energy:75.3kJ/mol
Electron affinity for chlorine:-349kJ/mol
If possible please type your answer and explanation.
Answers
The enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) is -411.65 kJ/mol.
The enthalpy of formation for NaCl(s) can be calculated using the given data as follows;
Na(s) → Na(g)
ΔH1 = +108 kJ/mol
1/2Cl₂(g) → Cl(g)
ΔH2 = +121 kJ/mol
Na(g) → Na+(g) + e-
ΔH3 = +496 kJ/mol
Cl(g) + e- → Cl-(g)
ΔH4 = -349 kJ/mol
Na+(g) + Cl-(g) → NaCl(s)
ΔH5 = -742 kJ/mol
The enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) can be calculated using Hess’s law.
Therefore;
ΔH5 = ΔH1 + ΔH2 + ΔH3 + ΔH4
Now, substituting the given data into the above equation we get;
-742 kJ/mol = +108 kJ/mol + 1/2(+121 kJ/mol) + (+496 kJ/mol) + (-349 kJ/mol) + ΔH4
Therefore;
ΔH4 = -75.3 kJ/mol
Thus, the enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) is given as;
ΔH5 = ΔH1 + ΔH2 + ΔH3 + ΔH4= 108 kJ/mol + 1/2(121 kJ/mol) + 496 kJ/mol - 349 kJ/mol - 75.3 kJ/mol
= -411.65 kJ/mol
Therefore, the enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) is -411.65 kJ/mol.
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Ca3(PO4)2(s)↽−−⇀3Ca2+(aq)+2PO3−4(aq)
if K3PO4 is added, how will the quantities of each species change? Fill in the blanks with either decreases or increases.
Ca2+ [ ] PO3-4 [ ] Mass of solid [ ]
Answers
On adding K3PO4, the quantity of Ca2+ increases, the quantity of PO3-4 increases, and the mass of the solid Ca3(PO4)2 will remain unchanged because the addition of K3PO4 does not affect the solubility of Ca3(PO4)2.
The reaction will shift towards the formation of more ions in order to maintain the equilibrium. The addition of K3PO4 will increase the concentration of PO3-4 ions, which will react with the Ca2+ ions to form more Ca3(PO4)2. This will increase the concentration of Ca2+ ions in the solution. However, the mass of the solid Ca3(PO4)2 will not change because the system is at equilibrium and the solubility of the solid is fixed. This problem involves the application of ion equilibrium and the principles of Le Chatelier's principle to predict the effect of adding a reactant on the equilibrium of a system.
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Answer:
[Ca2+] decreases, [PO3−4] increases, mass of solid increases
Explanation:
If phosphate ions are introduced, the phosphate ion concentration will increase. This then causes the solubility equilibrium to shift left, using up calcium to generate solid.
which of the following compounds have integer i values? (select all that apply.) which of the following compounds have integer i values? (select all that apply.) kcl ch3cooh na2co3 hclo4
Answers
The following compounds have integer i values:KClNa2CO3
The following compounds have integer i values: KCl and Na2CO3.
i stands for van't Hoff factor and is the number of particles formed from one solute molecule in a solution.
An i value of 1 means that no particles are produced upon solvation or that the solute molecule exists independently in the solvent.
Conversely, an i value greater than one indicates that one molecule of solute produces more than one particle in the solvent. This includes molecules that dissociate into ions, form complexes, or exist in a solvent as aggregates.
It is worth noting that the i value is an experimentally derived value and may not necessarily be an integer.
According to the question, the following compounds have integer i values:KClNa2CO3
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Review the hydroboration-oxidation reaction from your Organic I experience. Draw tripropylborane and 1-propanol, and show partial charges to illustrate umpolung (reversal of polarity) on converting a trialkylborane to an alcohol.
Answers
The hydroboration-oxidation reaction is a synthetic method used to convert an alkene into an alcohol. It involves two main steps: hydroboration and oxidation.
In the hydroboration step, an alkene reacts with a borane compound, typically trialkylborane, in the presence of a peroxide initiator. For example, in the case of propene, the reaction can proceed as follows:
Propene + Tripropylborane → Tripropylborane Propoxide
The key feature of this step is the addition of the boron atom to the less substituted carbon of the double bond. This is known as anti-Markovnikov addition, which is opposite to the normal electrophilic addition pattern observed in most reactions.
Now, coming to the concept of umpolung, it refers to the reversal of polarity in a molecule or functional group. In the hydroboration-oxidation reaction, umpolung occurs during the oxidation step.
In the oxidation step, the trialkylborane is treated with an oxidizing agent, such as hydrogen peroxide (H2O2) and a basic solution (e.g., NaOH). This leads to the cleavage of the boron-carbon bond and the formation of an alcohol.
For example, tripropylborane can be oxidized to 1-propanol as follows:
Tripropylborane Propoxide + H2O2, NaOH → 1-Propanol
During this step, the boron atom undergoes a transformation, and the partial positive charge that was initially on the boron is transferred to the oxygen atom, resulting in the formation of an alcohol.
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The saturation point for a solution is 25.0 grams of solute per 500 grams of solvent. If you pour 50.0 grams of solute into 800. grams of solvent, how many grams of
solute are in solution?
Plz help me!!
Answers
Answer:
I think 50 grams only because you have pour 50 grams of solute in to 800 grams of solvent.
describe how the labels indicate that one tablespoon of mayonnaise contains more energy than one tablespoon of ketchup
Answers
The label indicate that ne tablespoon of mayonnaise contains more energy than one tablespoon of ketchup because it contains high amounts of fat.
Calories are the amount of energy obtained from food and drink which is then used by the body for daily activities. Mayonnaise is a sauce made from eggs and vegetable oil, so it has high fat and high calories. Because in 1 gram of fat there are 9 kcal. which means fat is high in calories. While in 1 tablespoon there are 57 calories in Mayonnaise.
Ketchup or tomato sauce can be made from fresh tomatoes or from tomato paste mixed with various other spices. Therefore tomato sauce only contains vitamins A and C from tomatoes and does not contain fat and is low in calories. In one tablespoon there are 15 calories in ketchup or tomato sauce.
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What does it mean if something is insoluble?
A. It releases a gas upon reacting.
B. It will not dissolve in water.
C. It exists in a liquid state.
D. It is not reactive,
Answers
Answer:
It will not dissolve in water.
Explanation:
You're welcome
If something is insoluble it means that it will not dissolve in water. Therefore, option B is correct.
What is solubility?Solubility can be defined as the maximum amount of Solute that can dissolve in a known solvent at a particular temperature. By changing the temperature of the solution, we can increase the solubility of a substance. Sparingly soluble solids or liquids can be fully liquified by increasing the temperature.
Solubility depends on the nature of the given solute and the solvent. Substances such as sugar, NaCl, etc dissolve in water while substances such as naphthalene can not dissolve in water.
An insoluble substance can be defined as a substance or solid that will not dissolve in a solvent even after mixing such as sand. For example, Sand, Stones, Oil, Flour, and wax. Examples, of soluble things, are Salt, Sugar, Vinegar, Coffee, and Lemon Juice.
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How many molecules of oxygen are required to react with 174 g of carbon monoxide?
Answers
Answer:
6.22 mol
Explanation:
I think so but I don't know just yet
sorry if im wrong
Which brain region or part of the brain is responsible for hearing the sounds of a crowd in a baseball game?
Answers
Answer:
I think it's the auditory cortex or the temporal lobe
What is the equation for lactic fermentation after glycolysis?.
Answers
The equation for lactic fermentation after glycolysis is:
pyruvic acid + NADH → lactic acid + NAD⁺
Skeletal muscles are where lactic acid fermentation takes place. When there is not enough oxygen, lactate dehydrogenase converts pyruvate to lactic acid. Lactic acid accumulation in the muscles causes fatigue. Muscle cells and other bacterial and animal cells engage in a type of anaerobic fermentation.
The metabolic process known as lactic acid fermentation turns glucose or other six-carbon sugars into the metabolite lactate, which is the lactic acid in solution, and cellular energy.
The creation of many food products involves the bacterial process known as lactic fermentation. It serves a critical function in food safety by giving the finished products distinctive scents and textures.
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Which statement is true for most autotrophic organisms?
A. They carry on extracellular digestion of nutrients before they ingest them.
B. They synthesize organic molecules from inorganic molecules.
C. They obtain organic molecules from heterotrophic organisms.
O O
D. They require no external energy source.
Answers
omg yees
eExplanation:
what is the fluid used to make paper?
Answers
Answer:
MSDSs list Liquid Paper as containing titanium dioxide, solvent naphtha, mineral spirits, resins, dispersant, and fragrances. Liquid Paper came under scrutiny in the 1980s, due to concerns over recreational sniffing of the product. The organic solvent 1,1,1-trichloroethane was used as a thinner in the product.
Explanation:
At 35 degrees C, a small methane gas has a volume of 1.5 liters. The temperature of the methane gas is slowly cooled to to 17 degrees C. What is the new volume of the methane sample?
Answers
Answer: Trump
Explanation: chocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chocchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate chocolate chipchocolate
Scientist discovered a species that doesn’t have any organelles. what organism could it be?
A. Grass
B. Yeast
C. Slime mold
D. Bacteria
Answers
Scientist discovered a species that doesn’t have any organelles. organism could it be Bacteria.
Organelles are the tiny organs of the cell. organelles have one or more than one jobs to perform. The most important cell organelles is nuclei. Bacteria is single cell organism having cellular DNA and no organelles. Bacteria belongs to prokaryotic cells. Prokaryotic cells are smaller than the eukaryotic cells. Prokaryotic cell do not have nucleus and do not have organelles. You can find bacteria in almost everywhere in earth. some bacteria can survive in extreme temperature and pressure.
Thus, Scientist discovered a species that doesn’t have any organelles. organism could it be Bacteria.
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what are possible constraints, or challenges, which would prevent you from getting the features you listed?
Answers
The three primary constraints that project managers should be familiar with are time, scope, and cost.
What are some examples of constraints?
Stretched resources.Operational mishaps.Low performance.Lack of clarity.Scope creep.High costs.Time crunch.What are the 4 common types of constraints facing services?
The most common types of constraints facing service businesses are Time, Labour, Equipment, and Facilities.What types of situational restrictions are there?
A few instances from a typical workplace are an unpleasant temperature, a particularly obnoxious or loud coworker in the cubicle next to you, bad lighting, foul aromas, noisy equipment, or a supervisor who is overly demanding.What are some instances of societal restrictions?
To be more precise, we define social constraints as behavioural patterns that present possibilities for and place restrictions on the execution of engineering projects. Social restrictions may take the shape of official procedures like government laws or informal norms like cultural preferences.To know more about constraints, checkout this link:
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Which describes one way that Aristarchus's explanation of the movement of objects in the sky was different from other scientists' earlier explanations? He discovered Venus’s phases. He argued that Earth rotates on its axis. He explained the concept of retrograde motion. He described the epicycles of the planets in the sky.
Answers
Answer:
The correct option is;
He argued that Earth rotates on its axis
Explanation:
The hypothesis that the Sun is at the center of the universe and the Earth, the other planets and other heavenly bodies are revolving around the Sun was first proposed by Aristarchus of Samos who also believed that the motion of the stars where actually due to the rotation of the Earth about its axis
However, the propositions where rejected at the time because it was contrary to perception and senses such that a revolving Earth has to have a moving "great wind" in the air around us
Aristarchus's explanation of the movement of objects in the sky was different from that of other scientists because he argued that Earth rotates on its axis.
The solar system was deeply studied by the early astronomers. Each of them offered an explanation for the movement of objects in the sky. Some of these postulations were inconsistent with scientific evidence.
However, Aristarchus postulated that the sun is at the center of the solar system and that the earth and other planets move round the sun in orbits.
Hence, he suggested that the sun and not the earth was at the center of the solar system.
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The average human heart beats 2.5 billion times in a lifetime. The average lifespan is 78 years. What is the average heart rate?
SHOW YOUR WORK!!!!!!