Molecules can any forms of energy, except light energy.
What is Energy?The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.
Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.
Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.
Given options are-
A. light energy
B. Chemical energy
C. Sound energy
D. Kinetic Energy
Therefore, Molecules can any forms of energy, except light energy.
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1. Consider the equation: C2H4+O2 CO2 + H₂O
Is this equation balanced? Why or why not?
(a) If it is not balanced, how can you make it balanced?
The balanced chemical equations are as follow:
C2H4 + 3O2 ------- 2CO2 + 2H2O
What is Balanced chemical equation?A chemical equation is said to be balanced if the number of atoms or molecules of elements on reactant side is equal to the number of atoms or molecules of elements on product side.
This is based on the law of conservation of mass which says that the mass neither be created nor
be destroyed but it transferred from one form to another form.
The chemical equation is
C2H4 + 3O2 ------- CO2 + H2O
Since, the number of atoms of carbon on reactant side is 2 but on product side, it is 1. So, multiply CO2 by 2. It is balanced.
The number of atoms of Oxygen on reactant side is 2 but on product side, it is 5. So, multiply O2 by 3. It is balanced.
The number of atoms of Hydrogen on reactant side is 4 but on product side, it is 2. So, multiply H2O by 2. It is balanced.
Thus, we concluded that the balanced chemical equations are as follow:
C2H4 + 3O2 ------- 2CO2 + 2H2O
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What is the mass (in grams) of 11.50 L of propane vapor (C₂H₂) at
STP? R=0.08314 L-bar/mol-K.
The mass in grams of 23.0 L of propane vapor at STP is 22.968 g.
How do you explain mole concept ?The definition of a mole is a measure of material quantity. It is a unit of measurement used to determine how many elementary particles make up a specific material.It has a precise definition of 6.022 1023 elementary entities. Depending on the kind of substance, the elementary unit may be a molecule, atom, or ion. Avogadro's number is the quantity of elementary particles in a mole.As a good method of expressing the quantities of reactants and products, it is commonly used in chemistry.For all intents and purposes, the mass of one mole of a substance measured in grams and daltons is roughly same.The units for molar mass are grams per mole. For molecules, the atomic mass is equal to the molar mass, or weight, in grams that each mole of atoms contains.Given data :
No of moles=23/44=0.522 molesNo of moles in 44 liter = 0.522 moles.So the mass of 23 L of propane is 44×0.522 = 22.968 g.
Therefore, 23 liters of propane contain 22.968 g of propane at STP.
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What is the molar ratio of acid to base for the neutralization reaction between hcl and naoh?.
The mole ratio of acid to base when neutralizing hydrochloric acid with sodium hydroxide is 1:1. A mole of NaOH would completely neutralize one mole of HCl.
The mole ratio would be 2:1 if the hydrochloric acid and barium hydroxide were to be combined instead. Assuming they react in a 1:1 ratio in accordance with the balanced neutralization equation, the moles of acid and base are identical at the equivalence point in a neutralization. Using the reaction between solutions of hydrochloric acid and sodium hydroxide as an example, let's examine how a neutralization reaction creates both water and a salt. This reaction's general equation is NaOH + HCl H2O and NaCl.
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What element is the most abundant in stars including the sun?
Answer:
Hydrogen and helium are by far the most abundant elements found in the Sun, making up about 98 percent of its mass,
What do you think his hypothesis was?
a. Maggots grow through spontaneous
generation.
b. Maggots come from eggs laid by flies.
c. Maggots find their way into woods and
meats.
d. The problem cannot be solved.
His hypothesis was that b) maggots come from eggs laid by flies.
Redii demonstrated that maggots do not spontaneously generate from rotting meat. He placed three jars containing rotting meat, each covered with different kinds of material. One jar was covered with a fine cloth, one with gauze, and one with cork.
Flies were observed landing on all three jars of meat, but after eight days, only the jar covered with the gauze had maggots on the meat. Redii observed the maggots on the meat and concluded that they had not spontaneously generated, but had come from the eggs of the flies that had landed on the meat.
From this, he concluded that maggots only form on meat that is exposed to the air, and not on meat that is sealed in a jar. This showed that it was not "spontaneous generation" that was creating the maggots, but rather that they were being laid by flies.
This is because he put meat in different locations and found that maggots only appeared where there were flies.
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How is a chemical equation similar to a mathematical equation, and how do they model a natural phenomenon?
The chemical equation similar to a mathematical equation as equal sign means both sides . The differential equation is used as a model a natural phenomenon.
The chemical equations and mathematical equation have lot of common things. The balancing of equation and algebraic equation have similarities. we use differential equation is used as a model a natural phenomenon. chemical equation like the math's equation must be balanced. some basic concepts of math's are used in chemistry to balance equation.
Thus, The chemical equation similar to a mathematical equation as equal sign means both sides . The differential equation is used as a model a natural phenomenon.
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Answer:
The chemical equation similar to a mathematical equation as equal sign means both sides.
Explanation:
Chemical equations and mathematical equations have a lot in common. The equal sign in a math equation means that both sides, however they're written, are equivalent expressions of the same thing: 2(3) - 4 = 5(2) - 8 ← Try it for yourself. The arrow or arrows in a chemical equation mean the same thing.
A flashbulb of volume 2.6L contains O₂ gas at a pressure of 2.3atm and a temperature of 26°C. How
many moles of oxygen gas does the flashbulb contain? don't forget to convert °C to K *
Answer:
See below
Explanation:
Ideal gas law PV = n R T
P = 2.3 atm
V = 2.6 L
n = ?
R = .08205 L atm / (mole K)
T = 26 + 273.15 K
Plugging in the numbers finds n = .244 moles
PLEASE HELP 85 POINTS!
Aluminum chloride is a white compound that contains one aluminum atom and three chlorine atoms.
Which model is the best representation of aluminum chloride?
O A.
B.
Al
Cl
Al
Cl
O C.
D.
Cl
Al
Al
Cl
Answer:
Model B (in image) would the best representation of aluminum chloride.
Explanation:
It's the only model the has three chlorine atoms and one aluminum atom.
Additionally, Cl can only bond once, so it can't be bonded to multiple different atoms. Also, Al needs to have more than one bond to achieve the octet rule.
can someone help a lazy man out
The equation of the reaction is written as; [tex]4Al(s) + 3O_{2} (g) ---- > 2Al_{2} O_{3} (s)[/tex]
What is a reaction?It is common to see that in science, we have the combination of two substances and as the substances are combined there is a cleavage of the bonds that holds the molecules of the substances together and then new bonds are formed as the molecules are recombined in the products.
In this case we want to see the reaction between oxygen and aluminum. Now the word equation is aluminum + oxygen -----> aluminum oxide. The reaction equation would show the actual atoms that combined.
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What mass of BaCl2 is needed to make 0.500 L of a 0.250 M BaCl2 solution ? A. 0.125g B. 2.00g C. 21.6g D. 26.0g
The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, the mass of barium chloride is 0.80g.
What is molarity?Molarity can be calculated by dividing number of moles of solute by volume of solution in liter. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.
Mathematically,
Molarity= number of moles of solute÷ volume of solution in liter (1)
Where,
moles= given weight ÷ molecular weight
= w÷ 208.23 g/mol
Substituting values in equation 1, we get
0.250 M =(w/ 208.23 )/(0.500 L)
w=26.0g
Therefore, the mass of barium chloride is 0.80g.
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Part A
How much heat is required to melt 37.2 g of ice at (0 °C)? The heat of fusion for water is 6.02
kJ/mol.
Express your answer in kilojoules to three significant figures.
12.4 kJ of heat is required melt 37.2 g of ice at (0 °C)
What is Latent heat?
The equation is used to establish a relationship between how much heat is involved when a number of moles of a substance undergoes a phase change.
Equation for heat flow at constant temperature and pressure:
q = n *ΔH
where
q = amount of heat ?
n = no of moles
ΔH = enthalpy ( 6.02 kJ/ mol)
For water, the molar enthalpy of fusion is 6.02 kJ/ mol. It means , in order to convert 1 mol of solid ice at 0 °C to water at 0° C , we need to impart 6.02 kJ of heat
We know
n = w / M.M
n = moles
w = given mass ( 37.2 g )
M.M = molar mass ( molar mass of water)
n = 37.2 / 18
= 2.06
Substituting:
q = n * ΔH
= 2.06 * 6.02
= 12.401 kJ
Rounding to 3 significant figures., q = 12.4 kJ
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What is determined by the distance at which the lowest potential energy is achieved and the distance at which positive charges have the least repulsion?.
The positive charges in the two nuclei start to repel one another as the atoms get closer to one another, which raises the potential energy. The distance at which the lowest potential energy is attained determines the bond length.
How is bond length influenced by location?The internuclear distance at which the potential energy minimum occurs dictates the bond length. The equilibrium bond length is a more appropriate term since it reflects the distance at which the two atoms bounce as a result of thermal motion. In general, stronger bonds are formed when bonds are shorter.
Does the potential energy of bonds increase?When atoms are bound to other atoms, the majority of them achieve a lower potential energy. At this distance, the system's potential energy is supposedly equal to zero.
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if a piece of alumuiniam(Al) fail measuring 24cm by 31cm has a mass of 10.35g(density of Al=2.70gcm-3)find the thickness of the fail in millimater?
Thickness of the fail in millimeter is 0.051mm
Thickness is the quality or state of being thick
Here given data is
aluminum(Al) = 24cm by 31cm
Mass =10.35g
Density = 2.70gcm³
We have to find the thickness of the fail in millimeter = ?
So the formula is
thickness = Volume/surface area
So first we have to calculate volume
Volume = mass/density
Volume = 10.35g/ 2.70gcm³
Volume = 3.83
Then the area of foil is
Area = 24cm×31cm
Area = 744cm²
Thickness = volume/area
Thickness = 3.83/744cm²
Thickness = 0.0051cm = 0.051mm
Thickness of the fail in millimeter is 0.051mm
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A Galaxy is a grouping of what
A galaxy is a huge group of collection of dust, gas and billions of stars and their solar systems.
What is a galaxy?
A galaxy is the group of starts and some other objects of the space held together by gravity. The universe consists of more than 100 billion galaxies. A lot of dark matter is also found in the galaxies.
The galaxy where earth is present is called the milky way. Almost all the galaxies are thought to contain a supermassive blackholes at the center of the galaxies. The milky way is a spiral galaxy which has the disk, the nucleus and the halo. They contain stars, moons, comets, planets, neutron stars, dust and black holes.
Therefore, galaxy is a grouping of dust, stars, moons, comets and more than a billion stars with a black hole in the center held together by the gravity.
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Balance the following equation:
Answer:
[tex]C_{5} H_{12} + 8O_{2} \\\ - > 5CO_{2} + 6H_{2}O[/tex]
Explanation:
Blank 1: remain blank or put 1
Blank 2: 8
Blank 3: 5
Blank 4: 6
Purpose is to have the same amount of each element on both side of equation
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. The balanced equation is
C[tex]_5[/tex]H[tex]_12[/tex]+O[tex]_2[/tex][tex]\rightarrow[/tex]5CO[tex]_2[/tex]+6H[tex]_2[/tex]O
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side.
The unbalanced equation is
C[tex]_5[/tex]H[tex]_12[/tex]+O[tex]_2[/tex][tex]\rightarrow[/tex]CO[tex]_2[/tex]+H[tex]_2[/tex]O
The number of atoms of carbon on reactant side is 5 and on product side it is 1. so to balance it we need to multiply CO[tex]_2[/tex] by 5.
C[tex]_5[/tex]H[tex]_12[/tex]+O[tex]_2[/tex][tex]\rightarrow[/tex]5CO[tex]_2[/tex]+H[tex]_2[/tex]O
The hydrogen atom on reactant side is 12 while on product side it is 2, so multiply H[tex]_2[/tex]O by 6.
C[tex]_5[/tex]H[tex]_12[/tex]+O[tex]_2[/tex][tex]\rightarrow[/tex]5CO[tex]_2[/tex]+6H[tex]_2[/tex]O
To multiply oxygen we need to multiply O[tex]_2[/tex] by 8.
C[tex]_5[/tex]H[tex]_12[/tex]+8O[tex]_2[/tex][tex]\rightarrow[/tex]5CO[tex]_2[/tex]+6H[tex]_2[/tex]O
Therefore, the balanced equation is
C[tex]_5[/tex]H[tex]_12[/tex]+O[tex]_2[/tex][tex]\rightarrow[/tex]5CO[tex]_2[/tex]+6H[tex]_2[/tex]O
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which test tubes are controls in the experiment?
The control test tubes had substrates added but no enzymes and they are test tubes 1, 3, 5, and 7.
What are controls in an experiment?The control in an experiment is that variable or quantity to which no change has been applied.
The control in an experiment does not receive the treatment given to the study group or they may only receive a blank or a placebo.
Considering the given experiment to investigate the influence of temperature on enzyme function:
The control test tubes are those test tubes to which substrates were added but no enzymes were added.
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Complete question:
A student designs an experiment to investigate the influence of temperature on enzyme function. The student's plan is presented in Table 1. Which test tubes are controls in the experiment?
2. Beaker A contains 100 cm³ of 0.02 M NaOH and beaker B contains 200 cm³ of 0.03 M Na₂CO3. A Laboratory Technician decided to mix two solutions into a 500 cm³ beaker C. What is the molarity of the solution in beaker C assuming there was no loss in volume during mixing of two solutions?
The molarity of the solution in beaker C is 0.028 M.
The maximum not unusual manner to explicitly answer concentration is molarity (M), that's described as the amount of solute in moles divided with the aid of the extent of solution in liters: M = moles of solute/liters of solution. a solution this is 1.00 molar (written 1.00 M) incorporates 1.00 mole of solute for each liter of solution
Given ;
V = 0.1 L
M=0.02 M
V₂ = 200 cm³ = 0.2 L
M = 0.03 M
M₁V₁ + M₂V₂ = MV
V = M₁V₁ + M₂V₂ / M
= 0.02*0.1+0.03*0.2*2/0.5
= 0.028 M
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If a hydrate of the formula mcly⋅xh2o decomposes when heated to produce hcl, what change would you expect to occur when a piece of blue litmus paper is held in the path of the vapor released?.
Blue litmus paper turns red. xH2O is heated it decomposed to produce HCl which is the cause for a change in color.
Blue litmus paper is mainly used for acid testing. It turns red when it comes in contact with acid. It remains blue in contact with basic or neutral substances. The dye in blue litmus reacts with the H+ ions and is chemically changed so that the bonds are tuned to reflect longer wavelength light, appearing red to our eyes.
A simple way to measure pH is to use litmus paper. When litmus paper is touched it changes color depending on whether the paper is acidic or basic. If the paper turns red it is acidic if it turns blue it is basic. There is no reaction when blue litmus paper is placed on the pad, so there is no change in the blue litmus paper.
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5. What will happen to warmer ocean water?
It will rise.
It will evaporate.
It will sink.
It will freeze.
Nowadays, oceans are much warmer than the previously one. The oceans are heating very fastly nowadays due to the change in a climate. When ocean is warmer, it will rise the sea levels.
When the ocean is warmer or the water is heated, it takes up more space. Due to this, rise in the sea levels are occurred. In addition to this, warming of oceans causes faster melting of ice sheets in the ocean, which rises the sea level even more. Rising sea level causes more flooding, intense and long lasting tropical storms.
Therefore, warmer ocean water rises the sea level. Hence, the first option is correct.
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Answer:
It will rise up
Explanation:
Hope this helps
Which of the compounds can in principle be isolated in optically active form at room temperature? select all valid choices.
a local humane society houses 300 animals.the ratio of cats to all animals is 7 : 15
Why Boron trichloxide is monomer and aluminium trichloxide is dimer
Answer: The bond length and atomic size of boron in BCl3 are smaller than in AlCl3 so this leads to interatomic repulsion so BCl3 could not accept another BCl3 via a dative bond because it leads to more repulsion and finally breaking of dimer.
In noncyclic photophosphorylation, electrons flow in a one-way path from water to.
In noncyclic photophosphorylation, electrons flow in a one-way path from water to NADP⁺.
Photophosphorylation is the conversion of ADP to ATP by using the sunlight. the water molecules is split into the hydrogen and the oxygen this whole process is known as photolysis. In noncyclic photophosphorylation, electrons flow in a one-way path from water to NADP⁺ known as hill reaction. The process of cooperative production of energy is called as non cyclic photophosphorylation. The proton produces by the splitting of water molecule is combine with electron reduces the NDAP to NDAPH₂.
Thus, In noncyclic photophosphorylation, electrons flow in a one-way path from water to NADP⁺.
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does complexation equation and ionic equation the same?
Answer:
.,....................k
How do specialized brown fat cells take advantage of oxidative phosphorylation to generate heat?.
Specialized brown fat cells take advantage of oxidative phosphorylation to generate heat as they contain a carrier protein that dissipates the proton gradient across the inner mitochondrial membrane.
oxidative phosphorylation is when in mitochondrion the proton gradient does is the production of ATP from ADP. This depends on the oxidative reaction happening in the mitochondria. During oxidative phosphorylation electrons from NADH and FADH₂ combine with oxygen and then releases the energy from the oxidation or reduction reaction that is used to synthesis of ATP from ADP
Thus, Specialized brown fat cells take advantage of oxidative phosphorylation to generate heat as they contain a carrier protein that dissipates the proton gradient across the inner mitochondrial membrane.
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Solve the problems. Express each answer to the correct number of significant figures.
Type the correct answer in each box.
410 - 52 =
3.054 + 1.16 =
Answer:
410-52=360
3.054+1.16=4.21
Explanation:
13. What is the atomic mass of an atom if its mass is approximately equal to the following? 1 a. that of carbon-12 b. 4.5 times as much as carbon-12
The atomic mass of an atom if its mass is approximately equal to carbon-12 will be 12 and in case of 4.5 times carbon-12 will be 54
Atomic mass of an element is the average mass of the atoms of an element which are measured in atomic mass unit. Or we can also say that the atomic mass is actually the weighted mass is a weighted average of all of the isotopes of elements, in which the mass of each element is multiplied by the abundance of that particular isotope.
So the atomic mass of an atom if the mass is approximately equal to carbon-12 then the mass of the element will be equal to 12 as the atomic mass of carbon-12 is 12.
where as the atomic mass of an atom if its mass is approximately equal to 4.5 times as much as carbon-12 will be ⇒ 4.5×12= 54
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I NEED HELP RIGHT NOW PLEASE!
Use your own words.
Thomson's model was "wrong," as Rutherford demonstrated in 1911: the distribution of positive and negative particles was not uniform. Rutherford demonstrated that the atom's tiny, heavy, positively charged nucleus is present.
Why was J.J. Thomson wrong?In 1904, Thomson came up with his atomic model. A "Christmas cake" model, as we North Americans would say.He presumptively believed that inside a sphere of positive charge, the electrons were evenly distributed and unrestricted in their ability to spin in rings.Because there was so much positive matter inside each orbit, when an electron moved away from the positive cloud's nucleus, it experienced a greater net inward force. This helped to stabilize the orbits.His model became known as the plum pudding model because other people—not Thomson—compared it to the British dessert known simply as plum pudding.The raisins and nuts in a round Christmas cake are what many North Americans would liken it to.The Thomson model was rejected by the Japanese physicist Hantaro Nagaoka.He proposed that the nucleus of the atom was extremely large.Much like Saturn's rings, the electrons swung around the nucleus.When it came to the distribution of positive and negative particles, Rutherford demonstrated in 1911 that Thomson's model was inaccurate.The atom's small, massive, positively charged nucleus was demonstrated by Rutherford.Along with Nagaoka, he concurred that the electrons orbit the nucleus in a spherical fashion.To Learn more About Thomson's model refer to :
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The oxidation of chromium solid is represented by the following equation: 4 Cr + 3 0₂ - 2 Cr₂O3 How many moles of chromium (III) oxide are produced when 34.69 g Cr reacts with excess oxygen gas?
Moles of chromium (III) oxide is produced when 34.69 g Cr reacts with excess oxygen gas is 0.67 mole.
When oxygen combines with detail or compound, an oxidation response occurs. Oxidation also can be defined because of the manner in the elimination of hydrogen from the reactant species. Oxidation is the process of dropping electrons by using a molecule, atom, or ion.
Calculation:-
Cr + 3 0₂ - 2 Cr₂O3
Molar mass of chromium is = 52
mole = mass / molar mass
= 34.69 / 52
= 0.67 mole
When a reactant loses electrons for the duration of a response, it's far known as oxidation. whilst a reactant accumulates electrons throughout a reaction, it's miles known as reduction. when metals react with acid, that is a common incidence. while a reactant loses electrons all through a response, it is referred to as oxidation.
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the process of dividing a cell's cytoplasm and organelles
Answer:
Anaphase/Telophase
Explanation:
Anaphase is the phase where the cell is dividing the chromosomes and organelles. Telophase is a more of a moment in the process of replication than a definable "phase"
Earth is in constant motion. Which of the following does Earth's rotation on its axis cause?
Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Earth rotates eastward, in prograde motion. As viewed from the northern polar star Polaris, Earth turns counterclockwise.
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where Earth's axis of rotation meets its surface. This point is distinct from Earth's North Magnetic Pole. The South Pole is the other point where Earth's axis of rotation intersects its surface, in Antarctica.
Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern day is longer by about 1.7 milliseconds than a century ago,[1] slowly increasing the rate at which UTC is adjusted by leap seconds. Analysis of historical astronomical records shows a slowing trend; the length of a day increased about 2.3 milliseconds per century since the 8th century BCE.[2]
Scientists reported that in 2020 Earth had started spinning faster, after consistently spinning slower than 86,400 seconds per day in the decades before. On June 29, 2022, Earth's spin was completed in 1.59 milliseconds under 24 hours, setting a new record.[3] Because of that trend, engineers worldwide are discussing a 'negative leap second' and other possible timekeeping measures. [4]
This increase in speed is thought to be due to various factors, including the complex motion of its molten core, oceans, and atmosphere, the effect of celestial bodies such as the Moon, and possibly climate change, which is causing the ice at Earth's poles to melt. The masses of ice account for the Earth's shape being that of an oblate spheroid, bulging around the equator. When these masses are reduced, the poles rebound from the loss of weight, and Earth becomes more spherical, which has the effect of bringing mass closer to its centre of gravity. Conservation of angular momentum dictates that it spins faster, like a spinning ice skater drawing their arms in, causing them to spin faster.
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