Which formula can be used to find velocity if kinetic energy and mass are known?
V=
-(KE)(m)
V=
2 m
KE
V=
KE(m)
2 KE
V=
m
Answers
Answer:
[tex]v = \sqrt{ \frac{2ke}{m} } [/tex]
option D is the correct option.
Here,
If an object of mass 'm' moving with a velocity'v' then,
[tex]kinetic \: energy = \frac{1}{2} m {v}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {v}^{2} = \frac{2ke}{m} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {v}^{2} = \sqrt{ \frac{2ke}{m} } [/tex]
hope this helps...
Good luck on your assignment..
Answer:
it's D on edge2021
Explanation:
Related Questions
Question 4 of 10
Which two gases are trace gases in the atmosphere?
O A. Nitrogen
I B. Neon
O C. Oxygen
D. Methane
Answers
Answer:
Neon and Methane
Explanation:
Nitrogen and Oxygen made up way over half of the atmosphere so it's without a doubt, not those two. Precisely, Nitrogen makes up 78% of the atmosphere while oxygen makes up 21%
Answer: neon and methane
Which question would most likely be studied by a physicist?
A. Were there ever any living organisms on Mars?
B. How can the forces on a space probe be controlled so it will land
on Mars?
O C. What type of substances make up the soil on Mars?
O D. Should the government spend taxpayers' money to send space
probes to Mars?
Answers
Answer:A
Explanation: Were there any living organisms is the answer because physics is the study of matter,its motion and behaviour of space and time and some other topics like energy and force.
Answer:
B
Explanation:
Forces and vectors on a probe are a physics thing
HELP! 10 points rewarded, plus, best answer gets BAINLIEST!!
Answers
Answer:
4.08 grams
Explanation:
Essentially, we're looking for the mass of HCl that "matches" 3.26 grams of magnesium hydroxide.
First, convert 3.26 grams of [tex]Mg(OH)_2[/tex] into moles by dividing by the molar mass. The molar mass of [tex]Mg(OH)_2[/tex] is 24.3 + 16 * 2 + 1 * 2 = 58.3 g/mol. So, 3.26 grams is equal to:
3.26 g ÷ 58.3 g/mol = 0.0559 mol [tex]Mg(OH)_2[/tex]
Notice that from the chemical equation, magnesium hydroxide and hydrochloric acid (HCl) have a ratio of 1 to 2. In other words, for every 0.0559 moles of [tex]Mg(OH)_2[/tex], there are 0.0559 * 2 = 0.112 moles of HCl.
Finally, convert moles of HCl to grams by multiplying 0.112 by the molar mass, which is 1 + 35.45 = 36.45 g/mol:
0.112 mol HCl * 36.45 g/mol = 4.08 g HCl
The answer is thus 4.08 grams.
~ an aesthetics lover
what is Lfusion in the equation Q=mLfusion
Answers
Answer:
[tex]L_{\text{fusion}[/tex] is latent heat of fusion.
Explanation:
Latent heat is basically termed as hidden heat. It is defined as the amount of heat required to change 1 g of a substance at the temperature of its melting point from the solid to the liquid state at constant temperature.The formula that relates heat and latent heat of fusion is given by :[tex]Q=mL_{\text{fusion}}[/tex]
Here,
m is mass of substance
[tex]L_{\text{fusion}[/tex] is latent heat of fusion.
Which type of reaction does this diagram represent? (picture)
Answers
Answer:
its A.addition
Explanation:
edg. 2020 other guy is wrong
newborn reflexes... A. are consciously controlled behaviors B. are unique to each individual newborn C. have little impact on development D. contribute to infant survival
Answers
Answer:
The correct answer to the following question will be Option B.
Explanation:
To survive, newborns don't require reflexes. Even though their perceptions were already improving performance, they don't rely on visual stimulation because it was too abstract for them so you can't even guess whose stimulus they're going comes to choosing.The reflexes between each child are special. Each one of them has its own.For instance, its action has always been designed to suck quickly.
Some other choices being made aren't linked to the circumstance. The second Scenario would have been the right choice.
Jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
Answers
Answer:
The body of the refrigerator isn’t made of magnetic material.
Explanation:
Same reason why a magnet doesn't stick to a paper or a plastic is the reason behind why Jack's refrigerator is acting out because may be it isn't made of magnetic materials like iron, steel etc, but rather made up of non magnetic things like porcelain, wood etc.
A blacksmith heated an iron bar to 1445 °C. The blacksmith then tempered the metal by dropping it into 42,800 mL of
water that had a temperature of 22.00 °C. The final temperature of the system was 45.00°C. What was the mass of
the iron bar? (Hint: Density of water is 1.00 g/mL) The specific heat capacity for iron is 25.01 J/mol°C.
Answers
Answer:
6626 g
Explanation:
Given that:
Density of water = 1.00 g/ml, volume of water = 42800 ml.
Since density = mass/ volume
mass of water = volume of water * density of water = 42800 ml * 1 g/ml = 42800 g
Initial temperature of water = 22°C and final temperature of water = 45°C.
specific heat capacity for water = 4.184 J/g°C
ΔT water = 45 - 22 = 23°C
For iron:
mass = m,
specific heat capacity for iron = 0.444 J/g°C
Initial temperature of iron = 1445°C and final temperature of water = 45°C.
ΔT iron = 45 - 1445 = -1400°C
Quantity of heat (Q) to raised the temperature of a body is given as:
Q = mCΔT
The quantity of heat required to raise the temperature of water is equal to the temperature loss by the iron.
Q water (gain) + Q iron (loss) = 0
Q water = - Q iron
42800 g × 4.184 J/g°C × 23°C = -m × 0.444 J/g°C × -1400°C
m = 4118729.6/621.6
m = 6626 g
Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono_____________________ b-) O número de átomos de hidrogênio __________________ c-) O número de átomos de oxigênio ___________________ d-) Quantos átomos teremos ao todo se tivermos 8 moléculas dessa substância? _______ e-) Quantos átomos teremos de cada elemento com 20 moléculas de glicose
Answers
Answer:
Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono = 6 b-) O número de átomos de hidrogênio = 12 c-) O número de átomos de oxigênio = 6d-) Quantos átomos teremos quando descubro se temos 8 moléculas dessa substância?
48 oxigênio, 48 carbono e 96 hidrogênio e-) Quantos átomos de cada elemento teremos com 20 moléculas de glicose?
160 de oxigênio e carbono e 240 de hidrogênio.
Explanation:
A glicose é uma das moléculas mais usadas no organismo humano, pois é uma molécula em que sua decomposição é muito mais fácil que os aminoácidos, portanto, eles produzem como produto a moeda de energia que é ATP mais facilmente do que outros alimentos .
A glicose não é encontrada apenas em alimentos açucarados, isso é um mito, na verdade é a unidade de carboidratos (de assados a doces)
Dada la configuración electrónica de un elemento 1s2 2s2 2p6 3s2 3p6 3d10 4s1, se puede deducir si tendrá a formar enlaces de tipo: A)Ninguna de las anteriores B )Iónico y covalente C)Metálico y covalente D)Iónico y metálico
Answers
Respuesta:
D) Iónico y metálico
Explicación:
Consideremos al elemento con la configuración electrónica 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹.
Como el electron diferencial está en el nivel 4, el elemento está en el Periodo 4.
Como hay 1 electrón en el último nivel, el elemento esta en el Grupo 1.
El elemento en esa posición es el Potasio, que es un metal, por lo que puede formar enlaces metálicos con metales y enlaces iónicos con no metales.
all electromagnetic radiation: A. can travel through empty space B. travels at the same speed in a vacuum C.consists of photons D. all of the above
Answers
Answer:
A. can travel through empty space
Explanation:
it is said dat electro magnetic waves or radiation travels through the vacuum of space
Answer:
all of the above. Because, Y'know, electromagnetic radiation is like that.
Which of the following is the best definition of a physical change?
A. Something that can be observed or measured while changing the identity of the substance.
B. A nail rusting.
C. A change that occurs without changing the identity of the substance.
D. Ice melting into water.
Answers
Answer:
the answer is D.ice melting into water
Why does a perfume bottle burst when placed inside the flame?
Answers
Answer:
Explanation:
It is because they contain ethyl alcohol and they are inflammable. The perfume contains alcoholic substances like the ethyl alcohol or the ethanol. After reaching the flash point,the combustion of ethanol takes place inside the bottle and the internal combustion created pressure causes explosion.
Hope this helps
plz mark as brainliest!!!!!!!
Answer:
because they contain ethyl alcohol and they are inflammable.
How many moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride? FeCl3 + 3NaOH —> Fe(OH)3 + 3NaCl
Answers
Answer:
1.67 moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride.
Explanation:
The balanced reaction is:
FeCl₃ + 3 NaOH ⇒ Fe(OH)₃+ 3 NaCl
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reagents and products participate in the reaction:
FeCl₃: 1 moleNaOH: 3 molesFe(OH)₃: 1 moleNaCl: 3 molesThen you can apply the following rule of three: if 3 moles of NaOH form 1 mole of Fe(OH)₃, 5 moles of NaOH how many moles of Fe(OH)₃ do they form?
[tex]moles of Fe(OH)_{3} =\frac{5 moles of NaOH*1 mole of Fe(OH)_{3} }{3 moles of NaOH}[/tex]
moles of Fe(OH)₃= 1.67
1.67 moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride.
What can you infer about the results of numerical models in 1966 for polar caps
made of water ice?
Answers
Answer:
Those people could sustain on Mars, by living closer to the poles
Explanation:
As it is given that caps involve the water ice instead of the carbon dioxide
And, current observations of spectrum analyzed that the polar caps are totally different from one other i.e northern one involves more water ice while on the other hand, the southern one involves most of the carbon dioxide
Moreover, the astronomers unable to see to spectrum portions as the atmosphere absorbs the wavelength
So we conclude that the people could survive on mars if they live near to poles
Hexane and hexene are hydrocarbon compounds from different homologous series. the combustion of these two compounds produce different amount of soot. explain the difference based on the percentage of carbon by mass.
Answers
Answer:
Percentage of carbon of alkene is higher compared to the alkane that has the same number of carbon per molecule. Because of this, combustion of alkene will produce more sooty flame compared to their corresponding alkane and because Alkenes have a higher percentage of carbon compared to their corresponding alkane.
Explanation:
Relative atomic mass : C= 12 and H=1
Percentage of Carbon Hexane (C6H14)
Percentage of Carbon = 83.7 percent
6(12) x 6(12) +14(1) x 100 percent= 83.7 percent
Percentage of Carbon Hexene = 85.7 percent
As transformações estão presente em nosso cotidiano, elas nunca param de acontecer, na sua maioria invisível a olho nu.Quais critérios é preciso observar para identificar se ocorreu transformação?
Answers
Answer:
Explanation:
as transformações parecem invisíveis por causa do nível de organização da vida. A célula é a unidade básica da vida, a célula é invisível e todas as mudanças são resultado da formação de novas células no ser vivo.
Lipase is a protein that helps the body break down fats in foods. Lipase is best classified as which type of protein? an enzyme an antibody a structural protein a binding protein.
Its for edg please answer quickly if you can
Answers
Answer:
an enzyme
Explanation:
just took it on edge
Lipase is an enzyme protein which contains amino acids that helps the body break down fats in foods.
What is an amino acid?Amino acids are defined as the substances which are considered to be the monomers of proteins.Every amino acid has the same structure consisting of a central carbon which is bonded to an amino group , carboxyl group and a hydrogen.
Each amino acid also has another atom or a group of atoms bonded to the alpha carbon which are also known as the R group or the variable group of the side chain.There are 20 common amino acids present in natural proteins and each amino acid has the same backbone.
The sequence and number of amino acids determines protein's shape,size and also its function. Each amino acid is attached to the other by a covalent bond formed by a dehydration reaction.
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Answer the following questions based on their
electronic configuration.
a) 1s2 2s2 2p 2 b) is 2 2s 2 2p4
i) Write the name of the compound, its molecular
formula and type of chemical bond formed by
the combination of these two elements. Also
write down the balanced chemical reaction when
the above compound reacts with water.
Answers
Answer:
the molecular formula is CO2
The bond formed is covalent bond
CO2+H2O = H2CO3
The reaction between the compound and water will give us carbonic acid (H2CO3)
1) In 1.31 g of a chloride of titanium, there is 0.528 g of titanium. What is the empirical formula of this titanium chloride?
Answers
Answer:
TiCl2
Explanation:
Mass of the chloride of titanium= 1.31 g
Mass of titanium= 0.528 g
Therefore mass of chlorine = 1.31-0.528 = 0.782 g
To determine the empirical formulae of the titanium chloride, divide the mass of each element by its relative atomic mass and divide through by the lowest ratio.
Ti- 0.528/48 = 0.011, Cl- 0.782/35.5 = 0.022
Ti- 0.011/0.011 , Cl- 0.022/0.011
Ti- 1, Cl-2
Hence the required empirical formula is TiCl2
DUE IN 30 MINUTES!!! (please keep it short if you can, if not its ok.) What is the molar mass of Pb(SO4)2? Explain how you calculated this value. (4 points)
Answers
Answer:
399
Explanation:
Pb(SO4)2 contains 1 atom of Pb, 2 atoms of S and 8 atoms of O. So, atomic mass of Pb(SO4)2 is 207 + 64 + 128 = 399 u. Therefore, molar mass of Pb(SO4)2 is 399 g/mol.HOPE THIS helps. Good Luck
Answer:
The molar mass of Pb(SO₄)₂ is 399.32.
Explanation:
To find the molar mass of Pb(SO₄)₂, you have to find the molar mass of each individual element that makes up the compound.
Let's start by figuring out how many of each element is present in the compound.
Pb (lead) - 1
S (sulfur) - 2
O (oxygen) - 8
(SO₄)₂ is a polyatomic ion. It is written in parentheses followed by a subscript of 2. This means that there are two sulfate ions in the compound. So, the number of sulfur atoms and oxygen atoms doubles. (1 × 2 = 2) and (4 × 2 = 8).
Next, look up the molar mass of each element on a periodic table and multiply it by the number of atoms present.
Pb - 207. 2 × 1 = 207. 2
S - 32.06 × 2 = 64.12
O - 16.00 × 8 = 128
Lastly, add up them all together to get the molar mass.
207. 2 + 64.12 + 128 = 399.32
How much energy is required to vaporize 1.5 KG of aluminum
Answers
Answer:
The amount of energy required to vaporize 1.5 kg of aluminium is 16.345 GJ
Explanation:
Given that the heat of vaporization of aluminium, ΔHvap = 294000 kJ/mol
Mass of the given aluminium = 1.5 kG = 1500 g
Number of moles of aluminium = Mass of aluminium/(Molar Mass of aluminium)
Molar Mass of aluminium = 26.98 g/mol
Therefore, we have;
Number of moles = 1500/26.98 = 55.6 moles
The energy required = The heat of vaporization of aluminium × Number of moles of aluminium
The energy required = 294000 × 55.6 = 16345441.0675 kJ = 16.345 GJ.
Answer:
1650 kJ
Explanation:
Q = ΔH vaporization (for Al) x m
Q = 1100 kJ/kg x 1.5 kg = 1650 kJ
Representa la unión iónica entre los siguientes átomos: 1) Bromo y Potasio 2) Calcio y Oxígeno 3) Cloro y Magnesio 4) Sodio y Flúor 5) Aluminio y Nitrógeno Ayuda por favoor
Answers
Answer:
a. KBr
b. CaO
c. MgCl₂
d. NaF
e. NH₃
Explanation:
a. 2K + Br₂ = 2KBr
b. 2Ca + O₂ = 2CaO
c. Mg + Cl₂ = MgCl₂
d. 2Na + F₂ = 2NaF
d. N₂ + 3H₂ = 2NH₃
Halogens are active non metal
Answers
Answer:
True
Explanation:
They are actively non metals due to their electron configuration and number of valence electrons
Calculate the payback time if she insulates the loft with 300 mm insulation when: area of loft space = 100m^2 cost of roll of 100 mm thick loft insulation that covers 8.3m^2 = £20 cost of putting the insulation into the loft = £120 savings per year = £80 per 100 mm Payback Time = installation cost divided by annual savings
Answers
Answer: Payback time = 0.0075
Explanation: Since payback time is calculated as:
payback time = [tex]\frac{installation cost}{annual savings}[/tex]
First determine the installation cost:
100 mm thick insulation covers 8.3 m². Then 300 mm covers 24.9 m².
To cover 8.3m² costs £20. Then, the cost to cover 24.9 m² is:
cost = [tex]\frac{20*24.9}{8.3}[/tex]
cost = £60
The cost of putting the insulation is £120, so the total cost is:
total cost = £60 + £120
total cost = £180
Savings per year per 100 mm thick is £80. For 300 mm, the value of annual savings is:
savings = [tex]\frac{300*80}{100}[/tex]
savings = 240
payback time = [tex]\frac{installation cost}{annual savings}[/tex]
payback time = [tex]\frac{180}{240}[/tex]
payback time = 0.75
Which refers to the density of the medium’s particles at the compression of a sound wave? A.amplitude B.pitch C.volume D.wavelength
Answers
Answer:
A is the answer.
Explanation:
The sound wave is a longitudinal wave which travels in the form of compression and rarefaction . The point where the particles are closer to each other is called compression and the point where the particles are far apart from each other is called rarefaction.
Answer:
Amplitude
Explanation:
Amplitude describes the displacement of the medium's particles. The higher the amplitude, the more dense it is, and the lower the amplitude, the less dense it is.
Pitch is incorrect because it describes the sound
Volume is incorrect because it describes the sound.
Wavelength is incorrect because it describes the distance between a period of a wave.
Based on the bond energies for the reaction below, what is the enthalpy of the reaction? HC≡CH (g) + 5/2 O₂ (g) → 2 CO₂ (g) + H₂O (g) **Any help would be greatly appreciated!**
Answers
Answer:-1222kj
Explanation:
Based on the bond energies, the reaction HC≡CH(g) + 5/2 O₂(g) → 2 CO₂(g) + H₂O(g) has a standard enthalpy of reaction of -1222 kJ/mol.
Let's consider the following reaction.
HC≡CH(g) + 5/2 O₂(g) → 2 CO₂(g) + H₂O(g)
Given the bond energies (E), we can calculate the standard enthalpy of the reaction (ΔH°rxn) using the following expression.
[tex]\Delta H\° _{rxn} = E(broken\ bonds) - E(formed\ bonds)[/tex]
The broken bonds are:
HC≡CH
1 triple C-C bond2 single C-H bondsO₂
5/2 double O-O bondsThe formed bonds are:
CO₂
4 double C-O bondsH₂O
2 single O-H bonds[tex]\Delta H\°_{rxn} = E(C\equiv C) + 2 E(C-H) + 5/2 E(O=O) - 4 E(C=O) - 2 E(O-H)\\\\\Delta H\°_{rxn} = 835kJ/mol + 2 (411kJ/mol) + 5/2 (494kJ/mol) - 4 (799kJ/mol) - 2 (459kJ/mol) = -1222 kJ/mol[/tex]
Based on the bond energies, the reaction HC≡CH(g) + 5/2 O₂(g) → 2 CO₂(g) + H₂O(g) has a standard enthalpy of reaction of -1222 kJ/mol.
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sodium chloride is called an electrovalent compound where as carbon dioxide is called covalent compound why
Answers
Electrovalent compounds are those that are created when one or more electrons are transferred from one atom to another inside the compound. NaCl is an electrovalent substance because it shares an electron with other compounds to produce them.
What are compounds ?A material created by chemically joining two or more distinct components. Examples of compounds are table salt (NaCl), which is generated from the elements sodium and chloride, and water (H2O), which is created from the components hydrogen and oxygen.
One carbon atom and two oxygen atoms combine to form carbon dioxide. One carbon dioxide molecule contains four covalent connections. Because neither carbon nor oxygen are metals, we can infer that carbon dioxide is a covalent molecule.
Pure substances known as compounds are created chemically when two or more elements are combined in a specific mass proportion. Chlorine and sodium combine to form sodium chloride (common salt).
Thus, sodium chloride is called an electrovalent compound whereas carbon dioxide is called covalent compound.
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A glass cup of orange juice is found to have pOH of 11.40. Calculate the concentration of the hydrogen ions in the juice.
Answers
Answer: The concentration of hydrogen ion is 2.5 x 10∧-3.
Explanation:
It is well known that; pH + pOH = 14
∴ pH + 11.40 = 14
pH = 14 -11.40 = 2.60
Remember that,
pH = - Log [ H+ ]
2.60 = - log [H+]
To get the hydrogen ion concentration, we take the anti-log of 2.60.
[H+] = Antilog 2.60 = 2.5 x 10∧-3.
The ____ cycle is not a nutrient cycle
Answers
Answer:
Water cycle
Explanation:
The water cycle, also called as the hydrologic cycle that describes the continual flow of water i.e on over and beyond the surface of the Earth.
The nutrient cycle refers to the cycle in which there is a movement and exchange of organic and inorganic matter
Therefore the water cycle is not a nutrient cycle and hence the same is to be considered
Answer:
water cycle
Explanation:
:)