George was travelling on a concrete road with a drag factor of 1.2. his brakes were working at 100% efficiency. he spotted a deer in the road and slammed on his brakes, creating 3 skid marks each equal to 75 feet in length. what is the minimum speed george was travelling prior to using his brakes?
Answers
The minimum speed George was travelling prior to using his brakes was 50 mph. First, we need to calculate the coefficient of friction (μ) between the tires and the road. We can use the formula μ = drag factor/weight of the vehicle.
However, we are not given the weight of the vehicle, so we cannot calculate μ directly. Next, we can use the fact that the skid marks are each 75 feet in length to find the initial velocity (vi) of the vehicle before the brakes were applied. We can use the formula vi² = vf² + 2aΔx, where vf is the final velocity (0 mph, since the vehicle comes to a stop), a is the acceleration (equal to the deceleration caused by the brakes), and Δx is the distance traveled during the skid marks (75 feet). Rearranging the formula, we get a = (vf² - vi²) / 2Δx. Since vf = 0 and Δx = 75 feet, we can simplify this to a = -vi² / 150. Now, we can use the formula F = ma, where F is the force and friction applied by the brakes (equal to the weight of the vehicle times the deceleration caused by the brakes), and solve for the weight of the vehicle.
We get weight = F / a. Substituting the value for a that we just found, and using the fact that the brakes were working at 100% efficiency (meaning all of the force applied by the brakes is converted to deceleration), we get weight = 1.2 * 75 / (75² / 150) = 3600 pounds. Finally, we can use the formula μ = drag factor/weight of the vehicle to solve for μ. We get μ = 1.2 / 3600 = 0.000333. Now that we know μ, we can use the formula v = √(2μgΔx), where g is the acceleration due to gravity (32.2 ft/s²), and Δx is the length of one skid mark (75 feet). Solving for v, we get v = 50 mph. Therefore, the minimum speed George was travelling prior to using his brakes was 50 mph.
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Related Questions
A/an
is larger than the neutral atom.
Answers
Answer:
Anions are larger than their corresponding neutral atoms
Neutral atom has 17 electrons. How many neutrons are there in this atom?
Answers
Answer:
17
Explanation:
in a neutral atom the number of proton is equal to the number of neutron which is also equal to the number electron in a neutral element so according to the question the mass number is 34 it's proton and atomic number is still 17 and the electron is still 17
Two balls P and Q simultaneously hit a stationary ball R. The direction in which P was moving when it hit R, and the final direction in which R moves are shown. Which of these could be the direction in which Q was moving when it hit R.
Answers
The direction of the impact is the direction of the ball R.
What is the direction of impact?
The direction of impact refers to the direction in which a force is applied to an object. It can be described as the line along which a force is transmitted into an object, and can be unidirectional or multidirectional.
The direction of impact is important in fields such as physics, engineering, and material science, as it affects how an object reacts to the applied force and the resulting damage or deformation. In this case, the direction of the impact is the direction that is moved by ball R.
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When there are 0.0814 moles of hockey pucks how many hockey pucks are there?
Answers
Answer:
4.9 x 10²²hockey pucks
Explanation:
Given parameters:
Number of moles of hockey = 0.0814moles
Unknown:
Number of pucks there = ?
Solution:
A mole of a substance is made up of Avogadro's number of particles.
Therefore;
1 mole of hockey pucks will contain 6.02 x 10²³ hockey pucks
0.0814 mole of hockey pucks will contain :
0.0814 x 6.02 x 10²³ = 4.9 x 10²²hockey pucks
the empirical formula of a compound is SF6, and molar mass is 146.06g/ mol. find its molecular formula
Answers
Answer:
the molecular formula = SF6
Explanation:
firstly we have to list the firmulas we r goin to use to work out the molecular formula.
n=mass of compound ÷mass of empirical formulamolecula formula=n×empirical formulanow we use the 1st formula to find n which will be substituted into the molecular formula
We are going to take the mass we have been given in the question as the mass of the compound and substitute it to the formula.
Then we will work out the mass of empirical formula for the compound: Sulphur; 32 flourine;19 SF6_ 32+6(19)=146
now we finish off n
n=146.06÷146=1.000410959n=1Lastly we work out the molecula formula
mf=(S1F6)1 ;S 1×1=1 ;F 1×6=6mf=SF6the final answer will therefore be SF6
increasing the total pressure above a liquid raises the boiling point. which statement best explains why? question 12 options: the amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is raised. the number of molecules with high kinetic energies is reduced. the amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is decreased. the number of molecules with high kinetic energies is increased.
Answers
Increasing the total pressure above a liquid raises the boiling point because the amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is raised. The correct answer is option A.
When the pressure is increased, the vapor pressure of the liquid also increases, meaning that more energy is required to overcome the pressure and allow the liquid to boil. This is due to the fact that the increased pressure makes it more difficult for the vapor to escape from the liquid. As a result, more energy must be supplied to the liquid to reach the boiling point, leading to an increase in the boiling point temperature. hence option A is correct.
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--The complete Question is, Increasing the total pressure above a liquid raises the boiling point. which statement best explains why?
A. The amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is raised.
B. The number of molecules with high kinetic energies is reduced.
C. The amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is decreased.
D. The number of molecules with high kinetic energies is increased. ---
Question :-
How to balance chemical equations?
I need steps
Don't spam from Go0gle
!!!!CLASS 10 CHEMISTRY!!!!
Answers
Answer:
the main aim of balance in an equation is making show that the total number of substances on the reactant side is equal to the total number of substances on the product side
Explanation:
so if we were to balance the equation of water water is a compound containing two molecules of hydrogen and one molecule of oxygen therefore
H+O=H2O
\(H+O_2= H_2O\)
Element | Reactant | Product
H | 1 × 4 | 2×2
O | 2 | 1 × 2
\(4H+O_2= 2H_2O\)
A solid substance turns directly into a gas. Which term describes this change?
A)deposition
B)evaporation
C)melting
D)sublimation
Answers
Given what we know, we can confirm that the correct term to describe the change from a solid into a gas is sublimation.
What is sublimation?Sublimation is the change from a solid-state into a gas state.Most of the time one will first observe the change into a liquid state, however, with sublimation, the change is directly from the solid into the gas, such is the case with dry ice. Dry Ice is frozen carbon dioxide, as it thaws, it changes directly into its gaseous state.Therefore, we can confirm that sublimation describes the process by which an element passes from a solid directly into a gas, without first becoming a liquid.
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Answer:
D. sublimation
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
Question 33 of 33
What is the formula for copper(II) chloride?
O A. Cuci
B. Cuci
O c. 2CUCI
O D. CuCl2
Answers
Answer:
CuCI2 is the answer.......
TILEF
01:
A single atom element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
оооо
Se
Answers
Answer:
Na
Explanation:
sodium has mass number 23 and atomic number 11 so number of protons =number of electrons =atomic number which is 11 and number of neutrons=mass number-number of protons =23-11=12
Consider the following reaction:
10 KCIO3 + 3 P4 → 3 P4010 + 10 KCI
Given 30 moles of P4 and 86 moles of KCIO3, which would act as the limiting reactant?
Answers
Answer: \(KClO_3\) is the limiting reactant in the given reaction.
Explanation:
Limiting reagent is defined as the chemical specie which gets totally consumed in the reaction and the formation of product is dependent on this reagent.
We are given:
Moles of \(P_4\) = 30 moles
Moles of \(KClO_3\) = 86 moles
The given chemical equation follows:
\(10KCIO_3+3P_4\rightarrow 3P_4O_{10}+10KCI\)
By Stoichiometry of the reaction:
If 10 moles of \(KClO_3\) reacts with 3 moles of \(P_4\)
Then, 86 moles of \(KClO_3\) will react with = \(\frac{3}{10}\times 86=25.8moles\) of \(P_4\)
As, given amount of \(P_4\) is more than the required amount. So, it is considered as an excess reagent.
Therefore, \(KClO_3\) is considered as a limiting reactant because it limits the formation of product.
Find the mass of iron that has volume of 111 ml.
Answers
Answer:8
842.46 or to the next whole number
Explanation:
just multiply the mass of iron with the volume mL you have.
The mass of the iron whose volume and density are 111 ml and 7.847 g/cm³ respectively is 871.01 grams.
Which term is equivalent to product of density and volume?
The product of density and volume of a substance represents its mass. Mathematically -
M = V x ρ
where -
ρ - density
M - mass
V - volume
Given is iron in liquid form. It occupies a total volume of 111 ml.
The mass of liquid iron can be calculated using -
M = V x ρ
Volume of iron [V] = 111 ml = 111 cm³.
Density of iron [ρ] = 7.847 g/cm³
Therefore, we can write -
M = 7.847 x 111
M = 871.01 grams
Therefore, the mass of the iron whose volume and density are 111 ml and 7.847 g/cm³ respectively is 871.01 grams.
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40. 0% carbon, 6. 7% hydrogen, and 53. 3% oxygen with a molecular mass of 60. 0 g/mol. What is the molecular formula of the unknown compound?
Answers
The molecular formula of the unknown compound is C2H2O2.
To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.
Given:
Percentage of carbon = 40.0%
Percentage of hydrogen = 6.7%
Percentage of oxygen = 53.3%
Molecular mass = 60.0 g/mol
Step 1: Convert the percentages to grams.
Assuming we have 100 grams of the compound:
Mass of carbon = 40.0 g
Mass of hydrogen = 6.7 g
Mass of oxygen = 53.3 g
Step 2: Convert the masses to moles using the molar masses of the elements.
Molar mass of carbon = 12.01 g/mol
Molar mass of hydrogen = 1.008 g/mol
Molar mass of oxygen = 16.00 g/mol
Number of moles of carbon = Mass of carbon / Molar mass of carbon
= 40.0 g / 12.01 g/mol
= 3.332 mol
Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen
= 6.7 g / 1.008 g/mol
= 6.648 mol
Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen
= 53.3 g / 16.00 g/mol
= 3.331 mol
Step 3: Determine the empirical formula by dividing the moles by the smallest value.
Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.
So, the empirical formula of the compound is CHO.
Step 4: Determine the multiple of the subscripts to obtain the molecular formula.
To find the multiple, we divide the molecular mass by the empirical formula mass.
Molecular mass = 60.0 g/mol
Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol
Multiple = Molecular mass / Empirical formula mass
= 60.0 g/mol / 29.018 g/mol
= 2.07
Rounding to the nearest whole number, we get 2.
Therefore, the molecular formula of the unknown compound is C2H2O2.
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chemical reactions generally reach equilibrium because one of the reactants is used up.T/F
Answers
False. Chemical reactions reach equilibrium when the rates of the forward and reverse reactions become equal. This means that the amount of reactants and products present in the system remain constant over time.
While it is true that some reactions may appear to have reached equilibrium because one of the reactants is used up, this is not always the case. In some cases, the reaction may continue to occur, but at a slower rate, until equilibrium is reached. Additionally, some reactions may involve multiple reactants or products, making it more complex to determine if one reactant being used up is the sole reason for equilibrium being reached.
False. Chemical reactions generally reach equilibrium not because one of the reactants is used up, but because the rates of the forward and reverse reactions become equal. At equilibrium, the concentrations of reactants and products remain constant, but they do not necessarily become zero. The reaction continues to occur in both directions, but the net effect is zero, as the formation of products and consumption of reactants occur at the same rate. Equilibrium is a dynamic state that reflects the balance between the forward and reverse reactions.
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11) Predict the products of this reaction.
CuSO4(aq) + 2KOH(aq) →
A) Cu(OH)2(aq) + K2SO4(s)
B) Cu(OH)2(s) + K2SO4(aq)
C) CuOH(s) + K2SO4(aq)
D) CuOH2(s) + K2SO4(aq)
Answers
Answer:
6FCRXCTV
Explanation:
ED5RF6GT7HY8JU9KI0LO-;PJH7YNG6GDAnswer:
b
Explanation:
a p e x
What is the mass of an object that is moving at 8.0 m/s and has 70.0 J of kinetic energy?
Answers
Explanation:
\(ke = \frac{1}{2} \times m \times {v}^{2 } \\ m = \frac{2 \times ke}{ {v}^{2} } \\ m = \frac{2 \times 70.0}{ {8}^{2} } \\ m = \frac{140}{64} = 2.1875\)
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When stomach acid helps to break down food into smaller particles this is
an example of a change.*
O Physical
Chemical
O
Elemental
о
Atomic
Answers
Answer:
chemical, is the answer your looking for
issued this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your etext. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon.
Answers
The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.
Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.
Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.
According to the given data;
Decomposition of carbon monoxide (CO);
Oxygen produced = 3.36 g
Carbon produced = 2.52 g
We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;
Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol
Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol
Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;
0.21 mol C / (0.21 mol O) = x
Simplifying the equation, we have;
x = 1
Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.
Decomposition of carbon dioxide (CO₂);
Oxygen produced = 9.92 g
Carbon produced = 3.72 g
Following the same calculations as before;
Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol
Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol
Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;
0.31 mol C / (0.62 mol O) = y
Simplifying the equation, we have;
y = 0.5
Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.
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--The given question is incomplete, the complete question is
"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--
the concentration of iodide ions in a 0.193 m solution of barium iodide is
Answers
Since the molarity (concentration) of the barium iodide solution is provided as 0.193 M, we can assume that this concentration refers to the total concentration of barium iodide in the solution.
Barium iodide (BaI2) dissociates into one barium ion (Ba2+) and two iodide ions (I-) when it dissolves in water. Therefore, for every mole of barium iodide dissolved, we obtain two moles of iodide ions.
To calculate the concentration of iodide ions, we need to consider the stoichiometry of the dissociation. Since there are two iodide ions for every mole of barium iodide, the concentration of iodide ions would be double the concentration of barium iodide.
Concentration of iodide ions = 2 × Concentration of barium iodide
Concentration of iodide ions = 2 × 0.193 M
Concentration of iodide ions = 0.386 M
Therefore, the concentration of iodide ions in the 0.193 M solution of barium iodide is 0.386 M.
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Describe how to express the rate of a chemical reaction
Answers
Answer: A “rate” is a measure of the speed of any change that occurs within an interval of time In chemistry, reaction rate is expressed as the amount of reactant changing per unit time. Example: 3 moles/year, or 5 grams/second
Explanation: A “rate” is a measure of the speed of any change that occurs within an interval of time In chemistry, reaction rate is expressed as the amount of reactant changing per unit time. Example: 3 moles/year, or 5 grams/second
Answer:
Chemical reaction rates are usually expressed as the concentration of reactant consumed or, the concentration of product formed per unit time.
Explanation:
Have a great rest of your day
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Please answer the question
Answers
Answer: c
Explanation:
any 2 uses of echo pls fast
Answers
Answer:
uuuhm???? sonar??? and???? idk??? gooogle it
What is a superconductor?
A. A conductor that operates at room temperature
B. A conductor that allows electricity to flow easily
C. A conductor that conducts electricity faster than common metals
D. A conductor that allows electricity to flow through nonmetal solids
Answers
Answer:
its B
Explanation:
a p e x
Answer:
the answer is b. allows electricity to flow easily
1. what is the impedance of an ac series circuit that is constructed using a 10.0-ohm resistor and a 12.0-ohm inductive reactance and a 7.0-ohm capacitive reactance?
Answers
The impedance of an AC circuit with 10 ohm resistor, 12 ohm inductive reactance and 7 ohm capacitive reactance is 11.2 ohm.
What is impedance?
Impedance is the resistance of a circuit to AC which is caused by the combining effects of ohmic resistance and reactance. It is represented by the symbol Z and its unit is ohm. It is a measure of opposition to electric flow.
The impedance of an AC circuit can be calculated by,
Z = [(R^2) + (XL - XC)^2]^1/2
where R = resistance, XL = inductive reactance, XC = capacitive reactance
Z = [(10^2) + (12 - 7)^2]^1/2 = (100 + 25)^1/2 = 11.2 ohm.
Therefore, the impedance of an AC circuit with 10 Ohm resistor, 12 ohm inductive reactance and 7 ohm capacitive reactance is 11.2 ohm.
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What is the density of a substance that has a mass of 62.46 g and a volume of 46.82 mL?
Answers
The density of a substance that has a mass of 62.46 g and a volume of 46.82 mL is 1.33 grams per milliliter (g/mL).
Density is defined as the amount of mass that can be packed into a unit volume of a substance. It is an intrinsic property of matter that can be used to identify a substance. Density is calculated using the formula: Density = mass/volume. It is usually expressed in grams per milliliter or kilograms per cubic meter.
In the given question, we are given the mass and volume of a substance. We can find the density of the substance by dividing the given mass by the given volume.
Density = mass/volume = 62.46 g/46.82 mL ≈ 1.33 g/mL
Therefore, the density of the substance is approximately 1.33 grams per milliliter (g/mL). This means that if we have 1 milliliter of this substance, it would have a mass of 1.33 grams.
The density of a substance can be used to identify the substance as different substances have different densities. For example, the density of water is 1 g/mL, while the density of iron is 7.87 g/mL. Thus, if we know the density of a substance, we can determine what the substance is.
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if the density of hydrogen is 0.090 g l and its rate of diffusion is 5.93 times that of chlorine, what is the density of chlorine
Answers
The density of chlorine will be 3.163 g/L.
The mass of a substance per unit of volume is its density. According to Graham's law, a gas's rate of effusion is inversely proportional to its square root density. When a material's particles are concentrated in a low area, they tend to travel to the place where the concentration is highest. When we use perfume or a scented spray in one area of the room and subsequently can smell it throughout the entire space, that is a simple illustration of this process.
rate1 = H2 = 5.93
rate2 = Cl2 = 1
The molecular weight of H2 = 2.016
The molecular weight of Cl2 = x.
By Graham's Law:
5.93 / 1 = x / 2.016
35.1649 = x / 2.016
x = 70.89 g/mol
Determine gas density by volume
70.89 g / 22.414 L = 3.163 g/L
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the substances initially involved in a chemical reaction
Answers
The substances initially involved in a chemical reaction are called reactants.
They are the substances that are present at the start of the reaction and are transformed into different substances, known as products, during the reaction. The reactants are written on the left side of a chemical equation and the products are written on the right side.
In a chemical reaction,
Reactants are the starting materials that are transformed into different substances called products. These substances participate in the chemical reaction by forming new chemical bonds, breaking existing bonds, or both. The reactants are listed on the left side of a chemical equation, while the products are listed on the right side.Example:
In the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O), the reactants are H2 and O2, and the product is H2O. This reaction can be represented by the equation: H2 + O2 -> H2O
In this equation, the reactants H2 and O2 are listed on the left side of the arrow and the product H2O is listed on the right side.
It is important to note that the number of atoms of each element on the reactants side and products side must be equal. This principle is called the law of conservation of mass.
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Explain how the chromatogram shows that all three samples have at least one substance in common.
Answers
Answer:
The chromatogram shows that all three samples have at least one substance in common is described below in detailed explanation.
Explanation:
Chromatography is a process of distributing compounds by applying a changing solution on pure paper. A droplet of the compound solvent is recognized near one edge of the paper and then drained. The edge of the paper, closest to the point, is then drawn into the solution without submerging the place itself.
Use your knowledge of bonding and mechanisms to explain why:a. Alkenes are more reactive than alkanes
Answers
Alkenes are hydrocarbons that contain a double carbon bond, whereas alkanes are hydrocarbons that only have single carbon-carbon bonds.
The reason why alkenes are more reactive than alkanes is that the double bond has a very high electron density in comprarison to the single bond of the alkanes. This double bond is made up of one very strong σ bond and a weak π bond.
So generally alkenes react breaking the π bond.
Given a solid mixture containing sodium chloride, magnesium oxide and benzoic acid. i. Design a scheme to successfully separate and collect each component of the mixture.
Answers
Answer:
filtration and Chromatography
Explanation:
The first method used for separation of solids from the mixture is filtration. Filtration is used to separate different solids in a mixture which has particles of different sizes. Other method is Chromatography in which the compounds in the mixtures are separated from each other by moving the mixture at high speed. Due to high speed, the compounds are separated from each other because different compounds have different speeds so it is separated easily.