why is a moving car an example of kinetic energy
Answers
Answer:
the car is moving right so what does kinetic energy mean it means and object moving what is the car doing the car is MOVING
Related Questions
which model of the atom explains the orbitals of electrons as waves
Answers
Answer:
The Bohr model of the atom explains the reactivity of all atoms.
3.00 Liters of gas are stored at standard temperature and pressure. If the volume of the gas is increased to 4.00 L at a constant temperature what is the new pressure of the gas
Answers
The new pressure of the gas : 0.75 atm
Further explanationBoyle's Law
At a constant temperature, the gas volume is inversely proportional to the pressure applied
\(\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}\)
P₁=1 atm ⇒ standart temperature and pressure (STP)
V₁=3 L
V₂=4 L
\(\tt P_2=\dfrac{P_1.V_1}{V_2}\\\\P_2=\dfrac{1\times 3}{4}\\\\P_2=0.75~atm\)
1) pbo+co-->pb+co2 which type of reaction is this?
a) redox reaction
b) oxidation reaction
c) reduction reaction
d) none of the above
Answers
PbO + CO → Pb + CO₂
Oxidation States of the Elements
Reactants Products
Pb +2 0
O -2, -2 -4
C +2 +4
Since the oxidation state/number of Pb decreased, it is being Reduced.
Since the oxidation state/number of C increased, it is being Oxidized.
∴ this is a Redox ReactionFor a particular reaction, ÎH = -35 kJ and ÎS = -99 J/K . Assume that ÎH and ÎS do not vary with temperature.
At what temperature will the reaction have ÎG=0?
Answers
At a temperature of approximately 353.54 K, the reaction will have a ΔG of 0, indicating that it is at equilibrium.
For a reaction to have a ΔG (Gibbs free energy change) of 0, it must be at equilibrium. To determine the temperature at which this occurs, we can use the following equation:
ΔG = ΔH - TΔS
In this case, ΔH = -35 kJ and ΔS = -99 J/K. First, let's convert ΔH to J by multiplying by 1000:
ΔH = -35,000 J
Now, we can rewrite the equation with the given values:
0 = -35,000 J - T(-99 J/K)
To solve for the temperature (T), first isolate T by adding 35,000 J to both sides of the equation:
35,000 J = 99 J/K * T
Now, divide both sides by 99 J/K to find the temperature:
T ≈ 35,000 J / 99 J/K ≈ 353.54 K
At a temperature of approximately 353.54 K, the reaction will have a ΔG of 0, indicating that it is at equilibrium.
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When a substance undergoes a change
of state (liquid to solid, gas to liquid,
etc.), what type of property is involved?
A. a field property
B. no properties are involved
C. a fold-able property
D. a physical property
Answers
Answer:D
Explanation:Each time state transforms into a solid matter thus a physical property is the answer.BRAINLIEST PLEASE
I need help please I need them done
Answers
The second one is antoine
The 4th one is Humphry Davy
Answer:
Jöns Jacob Berzelius is the founder of today's modern symbols for elements.
Antoine Lavoisier is the one who identified oxygen as part of air
Humphrey Davy pioneered the field of electrochemistry.
A sample of a liquid solvent has a density of 0.670 g/ml. what is the mass of 97.5 ml of the liquid?
Answers
The mass of a liquid can be calculated by multiplying its density by its volume. In this case, we are given that the density of the liquid solvent is 0.670 g/ml and we need to find the mass of 97.5 ml of the liquid.
Density is a measure of how much mass is contained in a given volume. In this case, the density of the liquid solvent is 0.670 g/ml, which means that for every milliliter of the liquid, there are 0.670 grams of mass.
To find the mass of a certain volume of the liquid, we multiply the density by the volume. In this case, we multiply 0.670 g/ml by 97.5 ml to find the mass.
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the pKa of PhCH2NO2 is?
Answers
The pKa of PhCH2NO2, also known as benzyl nitrite, is approximately 10.5.
This means that at a pH below 10.5, the molecule will exist predominantly in its protonated form (PhCH2NO2H), while at a pH above 10.5, it will exist predominantly in its deprotonated form (PhCH2NO2-).
The pKa value of a molecule is important in determining its acidity or basicity and can affect its reactivity and solubility in different environments.
In the case of benzyl nitrite, its pKa value is relatively low compared to other organic compounds, indicating that it is a moderately acidic molecule.
This information can be useful in understanding the chemical properties and behavior of benzyl nitrite in various applications, such as in organic synthesis or as a pharmaceutical intermediate.
The pKa of PhCH2NO2 (also known as N-Benzyl Nitrobenzene) is a measure of its acidity, which indicates the tendency of the compound to donate a proton in a chemical reaction. pKa is the negative logarithm of the acid dissociation constant (Ka), and lower pKa values correspond to stronger acids.
Unfortunately, I could not find the exact pKa value for PhCH2NO2 in available literature, as pKa values are typically reported for compounds with acidic protons.
However, the structure of PhCH2NO2 consists of a benzyl group (PhCH2-) attached to a nitrobenzene (-NO2) moiety. Nitrobenzene itself has a pKa of around -5, indicating it is not a very strong acid.
Since the benzyl group is electron-donating, it would likely have a negligible effect on the acidity of the nitrobenzene.
In summary, the pKa of PhCH2NO2 is not readily available, but it can be inferred that it is not a strong acid based on the structure and the known pKa of nitrobenzene.
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methods used to reduce these pollutants
carbon monoxide and carbon dioxide
Answers
Answer: well some ways to reduce these pollutants are by Keeping gas appliances properly adjusted. Consider to purchase a vented space heater when replacing an unvented one. Use a proper fuel in kerosene space heaters. And Install and use an exhaust fan vented to outdoors over gas stoves.
When you have a cold and are infected with the influenza virus, are you the host or the parasite? Host or Parasite
Answers
Answer:
host
Explanation:
the virus exploits your cells
Answer:
parasite is worse than throwing up
Explanation:
throwing up tells you that you can't have an infection in every way possoble
In a directly proportional relationship, the line graph plotted is a __________ line which passes through the origin. What one word completes the sentence?
Answers
In a direct proportional relationship, the line graph is a straight line which passes through the origin.
Direct proportion is a relationship in which we plot a straight line of the type
y = mx.This is the equation in which y is directly proportional to x and this line passes through origin.
there are many examples of direct proportion in which one quantity varies directly with other i.e. it either decreases or increases in proportion with other quantity.in such cases one variable is called dependent variable while the other is called independent variable.
For eg. if in a certain job the greater the number of workers will be more will be the amount of work done in a given time.
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In a directly proportional relationship, the line graph plotted is a straight line which passes through the origin.
When two variables exhibit a directly proportional relationship, it means that as one variable increases, the other variable also increases by a consistent ratio or factor. In other words, the ratio of the two variables remains constant throughout. This constant ratio is often referred to as the proportionality constant.
When representing this relationship graphically, a straight line passing through the origin is observed. This indicates that for every increase or decrease in one variable, the other variable changes in direct proportion. This means that as one variable doubles, the other variable also doubles, and as one variable triples, the other variable also triples, and so on.
The line passing through the origin signifies that when both variables are zero, there is no quantity of either variable. As the values increase, they do so proportionally. Any point on the line represents a direct proportional relationship between the variables.
This type of graph is characterized by a linear relationship, where the slope of the line represents the constant rate of change or the proportionality constant. The steeper the slope, the greater the rate of change, indicating a stronger direct proportionality.
Overall, a straight line passing through the origin is a distinctive characteristic of a directly proportional relationship, representing the consistent ratio between the variables.
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Which of these would produce a soft sound A (a slow vibration) B (a big vibration) C (a fast vibration) or D (a tiny vibration)
Answers
Answer:
A slow vibration
Explanation:
Hard and soft refer to how much a sound vibrates. When a sound is hard the vocal cords come together and release producing a less resonant sound. In a soft sound, the vocal cords rub together creating friction and heat that results in a more resonant sound.
Which of the following statements best describes settlement patterns in Latin America? A. Most people live on islands in the Caribbean. B. Most people live near the border of the US. C. Most people live in cities. D. Most people live in mountainous regions.
Answers
"Most people live in cities" best describes settlement patterns in Latin America.
how do you get bromophenol blue to change to yellow
Answers
Answer:t changes from yellow at pH 3.0 to blue at pH 4.6; this reaction is reversible. Bromophenol blue is structurally related to phenolphthalein (a popular indicator).
...
Acid–base indicator.
Bromophenol blue (pH indicator)
below pH 3.0 above pH 4.6
Explanation:
Lab: Acids and Bases Assignment: Lab Report
What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
What is your hypothesis (or hypotheses) for this experiment?
What methods are you using to test this (or each) hypothesis?
Section II: Data and Observations
Locate the data and observations collected in your lab guide. What are the key results? How would you best summarize the data to relate your findings?
Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report?
Section III: Analysis and Discussion
What do the key results indicate?
If you constructed graphs, what trends do they indicate in your data?
Were there any problems with the experiment or the methods? Did you have any surprising results?
Section IV: Conclusions
What do the results tell you about your hypothesis(es)?
How do the data support your claim above?
If you could repeat the experiment and make it better, what would you do differently and why?
Answers
Answer:
Lab: Acids and Bases Assignment: Lab Report
The main point is to help the scientific method and to also see how it works.Sometimes people refer to the tentative answer as "an educated guess." Keep in mind, though, that the hypothesis also has to be testable since the next step is to do an experiment to determine whether or not the hypothesis is right! A hypothesis leads to one or more predictions that can be tested by experimenting.>State the hypotheses. Every hypothesis test requires the analyst to state a null hypothesis and an alternative hypothesis. The hypotheses are stated in such a way that they are mutually exclusive. That is, if one is true, the other must be false; and vice versa.>Formulate an analysis plan. The analysis plan describes how to use sample data to accept or reject the null hypothesis. It should specify the following elements.>Analyze sample data.Using sample data, perform computations called for in the analysis plan.>Interpret the results. If the sample findings are unlikely, given the null hypothesis, the researcher rejects the null hypothesis. Typically, this involves comparing the P-value to the significance level, and rejecting the null hypothesis when the P-value is less than the significance level and etc.Section II: Data and Observations
In a lab guide, the key results are those that support my working hypotheses or serve to reject these assumptions. Moreover, the key results may also be other discoveries that are important to understand the processes and/or mechanisms investigated in the experiment.•?
Section III: Analysis and Discussion
Key Results are the measures and milestones that indicate how you know you will accomplish our Objective.A linear pattern is a continuous decrease or increase in numbers over time. On a graph, this data appears as a straight line angled diagonally up or down (the angle may be steep or shallow). So the trend either can be upward or downward.Yes, i was surprised and learn so much and it was no problem.Section IV: Conclusions
Results will tell you which hypothesis is true.describe specific part of the procedure.If I were able to repeat the lab and do it differently I would try to do two different things to improve it. I would try to create the model in a simpler manner that allowed me to better see how the erosion factored in. I would also try to take more detailed notes on it if I were to repeat it.i hope it's helpAnswer:
anyone know the section II answers for a lab like this but its the thermal energy transfer lab
Explanation:
^^
What happens at the threshold value of a neuron?
a. Voltage-gated sodium (Na
) channels open.
b. Voltage-gated potassium (K
) channels open.
c. Voltage-gated calcium (Ca
) channels open.
d. Chemically-gated sodium (Na
) channels open.
Answers
At the threshold value of a neuron, voltage-gated sodium (Na+) channels open. The threshold value of a neuron is the critical level of depolarization that must be reached in order for an action potential to be generated. When this threshold value is reached, it causes voltage-gated sodium (Na+) channels in the neuron's membrane to open.
This allows sodium ions to flow into the neuron, causing further depolarization and leading to the generation of an action potential.Voltage-gated potassium (K+) channels also play a role in the generation of action potentials. However, these channels do not open at the threshold value of a neuron.
Instead, they open later in the action potential, allowing potassium ions to flow out of the neuron and repolarize the membrane. Chemically-gated sodium (Na+) channels are also involved in the generation of action potentials, but these channels are not voltage-gated and are not involved in the threshold value of a neuron.
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please help with the question tagged below
Answers
Answer:
It can lose it's electrion
Explanation:
A 0.366 g sample of hydrated tin(II) chloride (SnCl2•xH2O) is found to contain 0.0586 g of water. What is the approximate percent of water in the hydrate? What is the value of x?
16%
2. 81%
3. 84%
4. 75%
5. 19%
Part 2
1. 5
2. 1
3. 4
4. 2
5. 6
6. 3
Answers
1. The approximate percent of water in the hydrate is 16%
2. The value of x in the hydrate is 2
Data obtained from the question Mass of hydrate, SnCl₂•xH₂O = 0.366 gMass of water, H₂O = 0.0586 gPercentage of water =? Value of x =? 1. How to determine the percentage of water in the hydrateMass of hydrate, SnCl₂•xH₂O = 0.366 g
Mass of water, H₂O = 0.0586 g
Percentage of water =?
Percentage = (mass of water / mass of hydrate) ×100
Percentage of water = (0.0586 / 0.366) × 100
Percentage of water = 16%
2. How to determine the value of xTo obtain the value of x, we shall determine the formula of the hydrate. This can be obtained as follow:
Mass of hydrate, SnCl₂•xH₂O = 0.366 gMass of water, H₂O = 0.0586 gMass of anhydrous, SnCl₂ = 0.366 – 0.0586 = 0.3074Formula of hydrate =?Divide by their molar mass
SnCl₂ = 0.3074 / 190 = 0.0016
H₂O = 0.0586 / 18 = 0.0032
Divide by the smallest
SnCl₂ = 0.0016 / 0.0016 = 1
H₂O = 0.0032 / 0.0016 = 2
Thus, the formula of the hydrate is SnCl₂•2H₂O
Comparing the formula of the hydrate (SnCl₂•2H₂O) with SnCl₂•xH₂O, we can see that the value of x is 2
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If 0.025 gram of pb (No3)2 is dissolved in 100 gram of H2o ,what is the concentration of the resulting solution ,in parts per million?
Answers
The total mass of the solution is 0.100025 Kg. Hence, the concentration in parts per million is 246.93 ppm.
What is part per million ?Parts per million or ppm is a term used to express the concentration of a solution. The concentration of the a solution can be expressed in terms of the mass , volume or number of moles of the solute in the solution.
ppm of a solution = weight of solute in kg/weight of solution in kg ×10⁶.
Given , mass of solute lead nitrate = 0.025 g
mass of solvent = 100 g.
total mass of the solution = 100 + 0.025 = 100.025.g
mass in kg = 0.100025 Kg.
mass in kg of solute = 0.000025 Kg
ppm of solution = 0.000025 kg/ 0.100025 Kg ×10⁶. = 249.9 ppm.
Therefore, the concentration of the solution in ppm is 249.9 ppm.
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How much more average Kinetic Energy do molecules have at 50°C compared to 25°C?
Answers
The kinetic energy is 0.5177 × 10⁻²¹ J more at 50°C compared to 25°C.
The average kinetic energy of a molecule is directly proportional to the absolute temperature of a gas.
KE = ( 3/2 ) ( R / Nₐ ) T
Where T is the temperature of the molecule, R is the gas constant, and Nₐ is Avogadro's number.
Now, R = 8.314 J/mol.K
Avogadro's number, Nₐ = 6.022 × 10²³ atoms/ mol
The average kinetic energy at 50° C is:
T = 50° C = 323 K
KE₁ = ( 3/2 ) × ( R / Nₐ ) × T₁
KE₁ = ( 3 × 8.314 × 323 ) / ( 2 × 6.022 × 10²³ )
KE₁ = 668.90 × 10⁻²³ J
KE₁ = 6.6890 × 10⁻²¹ J
The average kinetic energy at 25°C is:
KE₂ = ( 3/2 ) × ( R / Nₐ ) × T₂
KE₂ = ( 3 × 8.314 × 298 ) / ( 2 × 6.022 × 10²³ )
KE₂ = 617.13 × 10⁻²³ J
KE₂ = 6.1713 × 10⁻²¹ J
Now,
The average kinetic energy of the molecules at 50° C compared to 25° C is:
KE = KE₁ - KE₂
KE = 6.6890 × 10⁻²¹ - 6.1713 × 10⁻²¹
KE = 0.5177 × 10⁻²¹ J
Hence, the average kinetic energy is 0.5177 × 10⁻²¹ J more at 50° C compared to 25° C.
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Which of the following is the correct model of C6H₁4?
A./\/\/\
B./\/\/
C./\/\
D./\/\/\/
Answers
\(C6H_14\)is the molecular formula for Hexane, a hydrocarbon. The correct model for \(C6H_14\) is D. Option D is correct answer.
/\/\/\/:Hexane (\(C6H_14\)) is an alkane with a chain of six carbon atoms, having 14 hydrogen atoms. The bond angles of carbon atoms in hexane are 109.5 degrees, and carbon atoms in hexane have a tetrahedral geometry. The representation of a molecule in a model helps to visualize the 3D structure of the molecule. A simple way to represent the 3D structure of hexane is by using the wedge-and-dash notation. In this notation, solid wedges represent bonds coming out of the plane of the paper towards us, and dashed lines represent bonds going back into the plane of the paper away from us. Using this notation, the correct model of hexane (\(C6H_14\)) would be D. /\/\/\/.
The correct option is D.
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A chemist measures the solubility of lead(ii) bromide in water to be 2. 96 g/l. calculate the ksp value for the solid. the ksp value is ___________. group of answer choices
Answers
The solubility product, ksp of PbBr₂ is 2.102 × 10⁻⁶
What is solubility?The solubility of a solute is defined as the maximum amount of that solute that can be dissolved in a known quantity of solvent at a given temperature.
What is a solubility product?Some salts are sparingly soluble in a solvent. For them, we calculate the solubility product.
It is an equilibrium constant that defines the relationship between a solid and its respective ions in an aqueous solution in equilibrium.
The greater the solubility product, the greater the solubility and vice versa.
Here, the solubility of PbBr₂ = 2.96 g/l
Molar solubility of PbBr₂ = \(\frac{2.96}{molar mass of PbBr_2}\) = 2.96/367 = 8.07 × 10⁻³
At equilibrium,
\(PbBr_2\rightarrow Pb^{2+} + 2Br^-\)
1 mole of PbBr2 dissociates into 1 mole of Pb²⁺ ions and 2 moles of Br⁻
Let the molar concentration of Pb²⁺ be x, then the molar concentration of Br⁻ is 2x
Ksp = x.(2x)²
= 4x³
Substitute, x = 8.07 × 10⁻³
Ksp = 4 (8.07 × 10⁻³)³
= 2.102 × 10⁻⁶
Thus, The ksp of PbBr₂ is 2.102 × 10⁻⁶
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which formula represents an inorganic compound? ch3co2ch2ch3 ch3nhch2ch3 clcccl cacl2
Answers
The formula that represents an inorganic compound is CaCl₂.
Calcium chloride (CaCl₂) is an inorganic compound that consists of one calcium ion (Ca²⁺) and two chloride ions (Cl⁻). It is derived from the chemical combination of calcium, a metallic element, and chlorine, a non-metallic element. Calcium chloride occurs as a white crystalline solid at room temperature.
CaCl₂ refers to calcium chloride, which is an inorganic compound composed of calcium and chlorine. It is a white crystalline solid with a salty taste and is highly soluble in water. Calcium chloride is commonly used in various applications such as de-icing roads, controlling dust, desiccation, and as a drying agent in laboratories. It also finds use in food preservation, wastewater treatment, and as a calcium supplement in some applications.
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Select the correct answer.
Which of the following is a physical model of the Sun?
A.
an equation that describes the Sun's motion
В.
a chart that lists the temperatures of different parts of the Sun
C.
a computer program that shows how the Sun changes over time
D
a paragraph that describes the Sun's structure
E.
a small yellow ball that represents the Sun
Answers
Answer: E
Explanation: The ball is yellow so it can easily represent the sun
A chemist needs to make 500.0 mL of a 2.5 M solution of sulfuric acid. Looking on the shelves, she finds a bottle of 10.0 M sulfuric acid. How can the desired solution be made?
I get 125mL but the book tells me it’s 130mL. Who is correct?
Answers
The volume of sulfuric acid required to make desired solution is 125 mL
It is given that
Initial volume of sulfuric acid V1 = 500.0 mL
Initial molarity M1 = 2.5 M
Final volume of sulfuric acid V2 = ?
Final molarity M2 = 10.0 M
Volume is the amount of space taken up by an object, while capacity is the measure of an object's ability to hold a substance, like a solid, a liquid or a gas.
We can find by using formula
M1V1 = M2V2
2.5 M x 500.0 ml = 10.0 M x V2
V2 = 125 mL
Hence, volume of sulfuric acid required to make desired solution is 125 mL
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_AL +
_Br2 —>
_AlBr3
Answers
Answer 2, 3, 2
Explanation:
True or false? Metal ions and hydrogen ions both have the same type of charge.
Answers
Answer: Its true, mental ions and hydrogen ion both have the same type of charge.
Answer:
TRUE, Metal ions, and hydrogen ions both have the same type of charge. Explanation: Metal atoms lose one or more electrons at their maximum energy level and improve positively charged ions. A hydrogen ion is created when a hydrogen atom loses electrons and then becomes positively charged (charge +1).
What are different types of bacteria classified?
Answers
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They are classified on the basis of their physical features- Shape and Appearance.
The four basic shapes of bacteria are Coccus (spherical or ovoid), bacillus (rod-like), vibrio (comma-shaped ), and spirilla (spiral or helical shaped).
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♪ ♫ Hope this helps :D
A drop taken from the top of a mixture of alt and water will jot be identical to a drop taken from the bottom of the mixture
Answers
A drop taken from the top of a solution of salt and water will not be identical to a drop taken from the bottom of the mixture because the salt and water molecules will be distributed differently throughout the mixture.
What is a solution?
A solution is a homogeneous mixture of two or more substances. In a solution, the solute, which is the substance that is dissolved, is evenly dispersed throughout the solvent, which is the substance that the solute is dissolved in.
Salt is denser than water, so it will tend to settle to the bottom of the mixture over time. This means that a drop taken from the top of the mixture will have a lower concentration of salt than a drop taken from the bottom.
Additionally, due to the process of diffusion, the salt molecules will tend to move from areas of higher concentration to areas of lower concentration, so the concentration of salt will be different at different points throughout the mixture. Therefore, a drop taken from the top will have less salt concentration than a drop taken from the bottom.
Therefore, as the salt and water molecules are distributed differently throughout the mixture a drop from the solution will be identical to that of the bottom of the jar.
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HI dissociates to form 12 and Hz: 2HI(g) → H2(g) + 12(9) If the concentration of Hl changes at a
rate of -0.45 mol L's? what is the rate of appearance of 12(g)?
Answers
Based on the rate of disappearance of HI, the rate of appearance of I₂ is 0.225 mol/L/s.
What is rate of reaction?
The rate of a reaction is the rate at which reactant molecules are converted to product or the rate at which product molecules are formed.
Rate of reaction = change in concentration of reactant or product/timeFrom the equation of the reaction, 2 moles of HI produces 1 mole of I₂.
The rate of disappearance of HI is -0.45 mol/L/s
The rate of appearance of I₂ will be 0.45/2 mol/L/s = 0.225 mol/L/s.
Therefore, the rate of appearance of I₂ is 0.225 mol/L/s.
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