Q8. Sara took some ice in a beaker and heated it. She recorded the changes in temperature using a
thermometer and had the following observations:
Time (in min.). Temp. (in C)
0 -3
1 -1
2 0
3 0
4 5
5 8
6 12
7 15
8 19
10 22
15 30
20 50
25 73
30 100
35 100
Based on the above observations, answer the following questions:
a. State the change observed between 2-3 minutes and name the process involved.
b. The temperature remains constant between 30-35 min, what could be the reason for this? Name the heat involved in this process and define it.
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Based on the observations provided:
a. Between 2-3 minutes, the temperature changed from -1°C to 0°C. This change is due to the process of melting, where the ice changes from a solid to a liquid state.
b. The temperature remains constant between 30-35 minutes because all the water has been converted into steam and the heat supplied is being used as latent heat of vaporization. Latent heat of vaporization is the heat energy required to change a substance from a liquid to a gaseous state at its boiling point without any change in temperature.
Related Questions
Sublimation is snow or ice changing to a gas without melting. What must happen to the molecules for this to happen?
Answers
Answer:Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.
Explanation:
The limiting reactant is...
A). The reactant that produces the least amount of product
or B). The reactant that produces the most amount of product
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Answers
Answer:
A.) produces the least amount of product.
When two ionic compounds are dissolved in water, a double replacement reaction can... Group of answer choices occur if two of the ions form an insoluble ionic compound, which precipitates out of solution occur if the ions react to form a gas, which bubbles out of the solution never occur since all ions are in water occur if the ions react to form a gas, which bubbles out of the solution ionic compounds only react with nonmetals
Answers
Answer:
occur if two of the ions form an insoluble ionic compound, which precipitates out of solution
Explanation:
When two ionic compounds are dissolved in water, a double replacement reaction takes place if two of the ions form an insoluble ionic compound, which precipitates out of solution. In double displacement reaction ions switch partners. And hence, produce an insoluble precipitate.
a student takes an ir spectrum of an unknown compound. the ir spectrum shows significant stretches at 3453 cm-1 (m, br), 3322 cm-1 (m, br), 3111 cm-1 (m, sh), 1512 cm-1 (s, sh), and 1260 cm-1 (s, sh). which possible compound is it? key: s
Answers
The possible compound of the student's unknown IR spectrum is 2-Butanol.IR spectrum is a technique that is used to detect the functional group present in the compound.
The given unknown IR spectrum shows the presence of significant stretches at 3453 cm-1 (m, br), 3322 cm-1 (m, br), 3111 cm-1 (m, sh), 1512 cm-1 (s, sh), and 1260 cm-1 (s, sh). The above-mentioned significant stretches are associated with the following functional groups:3453 cm-1 (m, br) - corresponds to the O-H stretch of a carboxylic acid, phenol, or alcohol.3322 cm-1 (m, br) - corresponds to the O-H stretch of a carboxylic acid, phenol, or alcohol.3111 cm-1 (m, sh) - corresponds to the C-H stretch of a terminal alkyne or a primary amine.1512 cm-1 (s, sh) - corresponds to the C=C stretch of an aromatic ring.1260 cm-1 (s, sh) - corresponds to the C-O stretch of an ether or ester.Using the above explanation, the possible compound of the student's unknown IR spectrum is 2-Butanol.
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which biogeochemical cycle(s) is/are impacted by the burning of fossil fuels?
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The burning of fossil fuels primarily impacts the carbon cycle, specifically the release of carbon dioxide (CO2) into the atmosphere. This increased concentration of CO2 contributes to the greenhouse effect and climate change. Additionally, the burning of fossil fuels can indirectly affect other biogeochemical cycles, such as the nitrogen cycle, through the production of nitrogen oxides (NOx) and their subsequent impacts on ecosystems.
The burning of fossil fuels, such as coal, oil, and natural gas, releases large amounts of carbon dioxide (CO2) into the atmosphere. This release disrupts the balance of the carbon cycle, which is responsible for the exchange and cycling of carbon between the atmosphere, land, and oceans. Fossil fuels, formed from ancient plant and animal matter, contain carbon that has been stored underground for millions of years. When burned for energy, the carbon is rapidly released as CO2, adding to the atmospheric pool of carbon and increasing the concentration of greenhouse gases.
The increased concentration of CO2 in the atmosphere contributes to the greenhouse effect, trapping heat and leading to global warming and climate change. This impacts various aspects of the Earth's systems, including temperature patterns, weather events, and sea-level rise.
Furthermore, the burning of fossil fuels can indirectly impact other biogeochemical cycles, such as the nitrogen cycle. Fossil fuel combustion releases nitrogen oxides (NOx), which are air pollutants that contribute to air pollution and acid rain. Nitrogen oxides can react with other atmospheric compounds and form nitric acid, which can be deposited onto land and water bodies through precipitation. This influx of nitrogen compounds can disrupt natural nitrogen cycling processes, affecting ecosystems, nutrient availability, and aquatic habitats.
In conclusion, the burning of fossil fuels primarily affects the carbon cycle by releasing carbon dioxide and contributing to climate change. It also has indirect impacts on other biogeochemical cycles, such as the nitrogen cycle, through the release of nitrogen oxides and subsequent ecological consequences. It is essential to reduce reliance on fossil fuels and transition to sustainable and renewable energy sources to mitigate these negative effects on biogeochemical cycles and promote a healthier planet.
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Which dilution of hydrogen peroxide would not be considered a broad spectrum disinfectant?
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The dilution of hydrogen peroxide that would not be considered a broad spectrum disinfectant is the solution which contain lower than 3% of hydrogen peroxide concentration.
Hydrogen peroxide is the simplest one among the peroxide group with a chemical formula H2O2. It is also an unstable chemical compound which in the presence of a base or a catalyst and is stored in a weakly acidic solution with stabilizer.
Hydrogen peroxide is used as an oxidative biocide because of its application as preservative, disinfection and sterilization. due to the antimicrobial properties Hydrogen peroxide is stored in liquid and gaseous form.
So, a 3-5% of hydrogen peroxide concentration solution is considered in the broad spectrum of disinfect.
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Question 5 of 10
Which of the following reactions is balanced?
OA. CaCl₂ + 2H₂CO3 → CaCO3 + HCI
B. 2CaCl2 + H₂CO3 → CaCO3 + HCI
C. CaCl2 + H₂CO3 → 2CaCO3 + HCI
O D. CaCl₂ + H₂CO3 → CaCO3 + 2HCI
Answers
Answer:
D.
Explanation:
I balanced each out and D is the one balanced
A model is simplified version of a more complex idea or system. It useful to help us understand something we can't actually see
A) true
B) false
Answers
Answer:
I feel like the answer is A) true
Explanation:
you create a model to help your audience understand your complex idea. There have been models made to represent ideas that we cannot see.
A student prepares solutions of Ca2+, Fe2+, Fe3+, Zn2+ and Mg2+, all at 5.0 x 10-4 M, at a buffered pH of 8.00. From the following Ksp values determine whether a precipitate will form or not?Species KspCa(OH)2 6.5 x 10-6Fe(OH)2 7.9 x 10-16Fe(OH)3 1.6 x 10-39Zn(OH)2 3.0 x 10-16Mg(OH)2 7.1 x 10-12a) Fe3+ and Zn2+ will precipitateb) Only Fe3+ will precipitatec) Fe3+, Zn2+, and Mg2+ will precipitated) Fe3+, Zn2+, Mg2+ and Fe2+ will precipitate
Answers
Answer:
Explanation:
The answer is (b) Only Fe3+ will precipitate
.To determine whether a precipitate will form, we need to compare the ion product (Q) to the solubility product (Ksp) for each compound. If Q is greater than Ksp, a precipitate will form. If Q is less than Ksp, no precipitate will form. If Q is equal to Ksp, the solution is saturated and no net change will occur.
Let's calculate Q for each compound:
Q for Ca(OH)2: Q = [Ca2+][OH-]^2
At pH 8.00, [OH-] = 10^-6.00 = 1.0 x 10^-8 M
Q = (5.0 x 10^-4 M)(1.0 x 10^-8 M)^2 = 5.0 x 10^-20
Since Q is much less than Ksp, no precipitate will form.
Q for Fe(OH)2: Q = [Fe2+][OH-]^2
At pH 8.00, [OH-] = 1.0 x 10^-6 M
Q = (5.0 x 10^-4 M)(1.0 x 10^-6 M)^2 = 5.0 x 10^-16
Since Q is equal to Ksp, the solution is saturated and no net change will occur.
Q for Fe(OH)3: Q = [Fe3+][OH-]^3
At pH 8.00, [OH-] = 1.0 x 10^-6 M
Q = (5.0 x 10^-4 M)(1.0 x 10^-6 M)^3 = 5.0 x 10^-22
Since Q is much less than Ksp, no precipitate will form.
Q for Zn(OH)2: Q = [Zn2+][OH-]^2
At pH 8.00, [OH-] = 1.0 x 10^-6 M
Q = (5.0 x 10^-4 M)(1.0 x 10^-6 M)^2 = 5.0 x 10^-16
Since Q is equal to Ksp, the solution is saturated and no net change will occur.
Q for Mg(OH)2: Q = [Mg2+][OH-]^2
At pH 8.00, [OH-] = 1.0 x 10^-6 M
Q = (5.0 x 10^-4 M)(1.0 x 10^-6 M)^2 = 5.0 x 10^-16
Since Q is much less than Ksp, no precipitate will form.
Therefore, the answer is (b) Only Fe3+ will precipitate.
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An experiment was conducted to determine if the intermolecular forces in two liquids affects their boiling points. Each liquid was sprayed on a paper towel. Each paper towel was wiped across a glass table to moisten the surface. The table shows a partial record of the experiment.
Answers
Given the partial record of the experiment, the information that should be recorded in the last column of the table is B. Time is taken by the glass surface to dry.
What is an intermolecular force?These are forces of attraction between atoms, molecules, and ions when they are placed close to each other.
Intermolecular forces are electrostatic in nature, and this means that they arise from the interaction between positively and negatively charged species.
Hence, an intermolecular force acts between molecules and their examples are London dispersion forces, dipole-dipole interaction, ion-dipole interaction, and van der Waals forces.
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The complete question
An experiment was conducted to determine if the intermolecular forces in two liquids affect their boiling points. Each liquid was sprayed on a paper towel. Each paper towel was wiped across a glass table to moisten the surface. The table shows a partial record of the experiment.
Experimental Record
Liquid Intermolecular Forces ?
А relatively strong
B relatively weak
What information should be recorded in the last column of the table?
Time is taken by the liquids to start boiling
Time is taken by the glass surface to dry
The volume of liquid required to moisten the paper towels
Time taken by the paper towels to become completely moist
If you have 60 moles of HCl, what should the volume of solution be to make a 10 M solution?
Answers
Answer:10
Explanation:
Multiply the volume by the density to get the mass.
Divide the mass by the molar mass to get the number of moles.
spectra are direct evidence for the existence of quantized energy levels in an atom. what would an emission spectrum look like if quantized energy levels in an atom did not exist?
Answers
Spectra are direct evidence for the existence of quantized energy levels in an atom.
Emission spectra are produced when excited atoms release energy in the form of light. These spectra are characterized by bright lines or bands of color on a black background. In general, these spectra are unique to a particular atom or molecule, and they can be used to identify the atomic or molecular species.
If quantized energy levels did not exist, the emission spectrum would appear as a continuous rainbow of color, rather than a series of distinct lines or bands. This is because atoms would not be able to absorb or release specific amounts of energy, and instead, would be able to emit or absorb any amount of energy.
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Can y’all help me with this
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A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of Cl- in this solution is
Answers
If a solution is prepared by dissolving 23.7 g of CaCl₂ in 375 g of water and the density of the resulting solution is 1.05 then the concentration of Cl⁻ in this solution is 1.196 M.
To calculate the concentration of Cl⁻ in a solution prepared by dissolving 23.7 g of CaCl₂ in 375 g of water, we need to first calculate the moles of Cl- present in the solution.
1: Calculate the moles of CaCl₂ present in the solution.
Molar mass of CaCl₂ = 40.08 + (2 × 35.45) = 110.98 g/mol. Number of moles of CaCl₂ = mass / molar mass = 23.7 g / 110.98 g/mol = 0.2133 mol
2: Since 1 mole of CaCl₂ contains 2 moles of Cl⁻, the number of moles of Cl- present in the solution is 2 × 0.2133 = 0.4266 mol
3: Calculate the volume of the solution using its density.
Volume = mass / density = 375 g / 1.05 g/mL = 357.14 mL = 0.35714 L
4: Calculate the concentration of Cl-.
The concentration of Cl⁻ = number of moles/volume of solution
= 0.4266 mol / 0.35714 L= 1.196 M.
The concentration of Cl⁻ in this solution is 1.196 M.
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The concentration of Cl- in a solution can be found by determining the number of moles of Cl-, calculating the volume of the solution, and dividing the moles of Cl- by the volume.
Explanation:In order to find the concentration of Cl-, we first need to determine the number of moles of Cl-. Given that the molar mass of CaCl2 is roughly 110.98 g/mol, we can find this by dividing the mass of CaCl2 (23.7 g) by the molar mass (110.98 g/mol). Since there are two moles of Cl- for each mole of CaCl2, this gives us the number of moles of Cl-.
The density of the solution is given as 1.05 g/mL, from which the volume can be determined by dividing the total mass of the solution (375 g + 23.7 g) by the density. The concentration of Cl-, in moles per liter, is then calculated by dividing the number of moles of Cl- by the volume of the solution in liters.
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table 1.4 shows the melting and boiling points of four substances A-D. In which of these four substances are the particles arranged in a lattice (a regular structure) at room temperature
Answers
S is a solid at room temperature.
What substance are the particles arranged in a lattice (a regular structure) at room temperature?A substance whose particles are arranged in a crystal lattice at room temperature will be a solid.
A solid have a definite shape and volume at room temperature due to the regular arrangement of the particles of the solid.
Solids melt at their melting points. A solid whose melting point is less than room temperature will be a liquid or gas at room temperature.
Room temperature is 25°C
Considering the given table:
Solid S has a melting point above room temperature, therefore S is a solid at room temperature.
In conclusion, solids have definite shapes and volume.
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The ratio of a weak acid and its conjugate base at the point of maximum buffering capacity is Group of answer choices 10/1 1/10 1/1 no definite ratio is needed
Answers
The ratio of a weak acid and its conjugate base at the point of maximum buffering capacity is 1/1 and the correct option is option is option 3.
A weak acid is an acid that only partially dissociates or ionizes in water, resulting in a relatively low concentration of hydrogen ions (H⁺). It does not completely donate all of its protons in a solution. Examples of weak acids include acetic acid (CH₃COOH) and carbonic acid (H₂CO₃).
A conjugate base is the species that remains after a weak acid loses a proton (H⁺). It is formed by the acceptance of the donated proton. The conjugate base of an acid has the ability to accept a proton and act as a base. For example, the conjugate base of acetic acid (CH₃COOH) is the acetate ion (CH₃COO⁻), and the conjugate base of carbonic acid (H₂CO₃) is the bicarbonate ion (HCO₃⁻).
This means that the concentrations of the weak acid and its conjugate base are equal. At this point, the system is most effective in resisting changes in pH when small amounts of acid or base are added. The equal concentrations ensure that both species can readily accept or donate protons, maintaining the pH within a narrow range.
Thus, the ideal selection is option 3.
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2
A balloon with a volume of 250.0 ml at sea level has a pressure of 760.0 mm of Hg.
The balloon is released and it climbs to a level with a new pressure of 600.0 mm of Hg.
What is the new volume of the balloon? [Difficulty 1]
Answers
The final volume of the balloon will be 316.6 ml
Given,
V1= 250 ml
P1= 760 mm Hg
V2=?
P2= 600 mm Hg
From the given question, the final volume can be calculated using Boyle's law.
The link between a gas's pressure, volume, and temperature is shown by Boyle's law. It asserts that under constant temperature, a gas's pressure is inversely proportional to its volume.
Boyle's law is valid only for ideal gas.
Pressure and volume are represented by a rectangular hyperbola on the graph.
P ∝ 1/V or PV = K
∴P1 x V1 = P2 x V2
⇒ 250 x 760 = 600 x V2
⇒190000 = 600 x V2
⇒190000/ 600 = V2
⇒V2 = 316.6 ml
Hence, the new volume of the balloon will be 316.6 ml.
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Which of the following radioactive emissions is the least penetrating?
alpha particles
gamma rays
beta particles
Answers
Answer:
alpha particles
Explanation:
alpha particles the least penetrating but potentially most damaging and gamma rays the most penetrating. A beta particle, also called beta ray or beta radiation, is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.
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Helppppppppppppppppp
Answers
Answer:
I think it's B
Explanation:
Brainlest po
Maybe i been learn this before
Vote Bbm and sara on election for the win.
what products are formed when the following compound react with ozone and then with dimethyl sulfide?
Answers
The products are formed when the compound react with ozone and then with the dimethyl sulfide is the Pentan-2-one and the propan-2-one.
A cyclic intermediate is known as the molozonide is formed when ozone molecule react the double bond of the compound, then forming the primary ozonide. The Aldehydes and the ketones are the examples of the carbonyl compounds, that are formed when the ozonide molecule is further broken down.
The Dimethyl sulphide will causes the ozonide molecule that go through the reductive workup and then produce the ketone. The Dimethyl sulphide then reduces the main ozonide and it will produce the aldehydes or the ketones.
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After reading “The Human Microbiome” article, you learned that there are trillions of bacteria in the human microbiome. Which of these statements do you agree with most right now?
Bacteria are disgusting! Most bacteria in the human microbiome are harmful.
Bacteria are disgusting! Most bacteria in the human microbiome are harmful.
Bacteria are great! Most bacteria in the human microbiome are helpful.
Bacteria are great! Most bacteria in the human microbiome are helpful.
I’m not sure! Bacteria are kind of disgusting, but some of them might be helpful.
Answers
Answer:
I’m not sure! Bacteria are kind of disgusting, but some of them might be helpful.
Explanation:
My opinion since I didn't get to read the article :)
If you can solve these thank you I will mark brainly.ASAP
Answers
Answer:Number 2 might be the second one
Explanation:
2. A liquid has a definite mass (all of the common states of matter have definite mass) and it has a definite volume: The particles of a given mass of liquid will occupy the same amount of space regardless of the shape of the liquid’s container; it likewise follows that a liquid does not have a definite shape. So, while one liter of water can fill and take the “shape” of a bowl or a bottle, there will always be one liter of water in each. So, the correct answer here would be the fourth answer choice.
3. A solid has a definite mass, a definite shape, and a definite volume precisely because its particles are not free to zip around freely (or rapidly). So the fourth statement is not true, and thus the fourth answer choice would be the correct answer here.
Street lights are yellow/orange in color and not white. Based on your flame test data, what gaseous element is present in street lights?
Answers
Answer: sodium
Explanation: Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce. For example, copper produces a blue flame, lithium and strontium a red flame, calcium an orange flame, sodium a yellow flame, and barium a green flame.
Based on the flame test, the gaseous element which is present in street lights is sodium.
What is spectrum?Spectrum is a table or a chart in which intensity of the emitted lights are showing over a range of species.
Each element show different color of spectrum in the emission process, whenever excited element emitted enegy then released energy is shown in the form of color spectrum. In traffic lights sodium lamps are present which in the presence of heat gets excited and changes to the gas form and emitted yellow color light.
Hence sodium gaseous element is present in street lights.
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why atoms of magnet differ from normal atoms?
Copied answers ❌❌❌
Answers
Answer:
The magnetic field of an atom, say H (one electron revolving around a proton) is composed of two separate contributions: an orbital magnetic moment and a spin magnetic moment. We get magnetic moments because of electromagnetic induction associated with each type of electron motion. The electron revolving around the proton with a certain angular momentum is related to the associated orbital magnetic moment (and, yes, we model it as a wire loop with current expressed in terms of the orbital velocity). This can be calculated using elementary mechanics. The spin magnetic moment is a little trickier because it is caused by the intrinsic spin of the electron which is a quantum phenomenon; therefore, this spin magnetic moment can only be calculated using quantum mechanics. In the end, we get a certain net magnetic moment associated with this motion of the electron in an atom. It is important to notice that this atom acts as a magnetic dipole (remember, as of yet, magnetic monopoles don't exist!).
If we take a bulk magnet like you might have on your fridge, it would be composed of atoms. Each atom operates as a magnetic dipole, but due to internal atomic structures, the atoms actually align themselves into separate magnetic domains, each with a net magnetic moment (caused my individually adding up those atomic dipole moments). In a common magnet (ferromagnet), these domains all point the same direction and stay that way, creating a permanent bulk magnetic dipole.
So in a way, there is no difference between the magnetic field of an atom and that of a magnet because one is simply a sum of the other, making both magnetic dipoles. Of course, here we see that there's nothing that fundamental about the magnetic force. In reality, the magnetic force is a relativistic effect caused by the movement of a charged particle, making electricity (i.e. charge) the underlying property at work here. Electromagnetic induction is really a shortcut to understand the magnetic force without worrying about relativistic mechanics. If we were to discover magnetic monopoles (i.e. "magnetic" charge), this would re-write a lot that we know about electromagnetism because we couldn't label all magnetic forces as by-products of moving electric charge
Calculate the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 ml solution.
Answers
Taking into account the definition of molarity, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 \(\frac{moles}{liter}\).
Definition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
\(molarity=\frac{number of moles}{volume}\)
Molarity is expressed in units \(\frac{moles}{liter}\).
Molarity in this caseIn this case, you have:
number of moles= 0.2 molesvolume= 100 mL= 0.1 LReplacing in the definition of molarity:
\(molarity=\frac{0.2 mole}{0.1 L}\)
Solving:
molarity= 2 \(\frac{moles}{liter}\)
Finally, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 \(\frac{moles}{liter}\).
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Japan and New Zealand are examples of strings of volcanic islands known as __________.
Answers
Answer:
Island arcs hot spot.
Explanation:
las cadenas de islas volcánicas son conocidas como Cinturón de Fuego del Pacífico
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Define Kelvin's Temperature.
Answers
Answer:
Is an absolute temperature scale with zero at absolute zero
The relationship between kinetic energy and speed is
Answers
Answer:
The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved.
This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed.
KE = 0.5 • m • v2
where m = mass of object
v = speed of object
That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. For a threefold increase in speed, the kinetic energy will increase by a factor of nine.
By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron.
Answers
That is correct. Heme, by itself, is not an efficient oxygen carrier. Heme is an iron-containing molecule that can bind oxygen reversibly.
Heme is usually found in hemoproteins, which stabilise and preserve iron. Myoglobin and haemoglobin are well-known hemoproteins.
Red blood cells transport oxygen from the lungs to tissues via haemoglobin. Four subunits contain oxygen-binding heme groups. Hemoglobin's protein structure protects heme's iron, keeping it oxygen-binding.
Muscle cells contain oxygen-storing myoglobin. Its heme group allows muscles to efficiently store and release oxygen. Heme can operate as an oxygen carrier and avoid oxidation in certain protein complexes.
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A formula for the relationship between weight and blood pressure in children is given by the formula below where P(x) is measured in millimeters of mercury and x is measured in pounds. Use the formula to answer the questions. P(x)=17.9(9+lnx)10≤x≤100 What is the rate of change of blood pressure with respect to weight at the 60-pound weight level? The rate of change at the 60-pound weight level is approximately mm/ pound. (Do not round until the final answer. Then round to the nearest hundredth as needed.) What is the rate of change of blood pressure with respect to weight at the 70-pound weight level? The rate of change at the 70-pound weight level is approximately mm/ pound. (Do not round until the final answer. Then round to the nearest hundredth as needed.)
Answers
The formula for the relationship between weight and blood pressure in children is:
P(x) = 17.9(9 + ln x) 10 ≤ x ≤ 100To find the rate of change of blood pressure with respect to weight at the 60-pound weight level.We differentiate the above function with respect to x Therefore:
dP/dx = 17.9(1/x)Now substituting x = 60 in the above equation, we get: dP/dx = 17.9(1/60) dP/dx = 0.298The rate of change at the 60-pound weight level is approximately 0.30mm/ pound.Rate of change at the 70-pound weight level:
Similarly, we can find the rate of change at 70-pound weight level, by differentiating the function P(x) with respect to x. Therefore, dP/dx = 17.9(1/x)Now substituting x = 70 in the above equation, we get:dP/dx = 17.9(1/70) dP/dx = 0.2557The rate of change at the 70-pound weight level is approximately 0.26mm/ pound.About BloodBlood is a fluid found in all living things that functions to deliver substances and oxygen needed by body tissues, transports chemical products of metabolism, and also acts as the body's defense against viruses or bacteria. Blood has the function of regulating acid and base balance. ,transports O2, carbohydrates, and metabolites, regulates body temperature by conduction or conduction, carries body heat from heat production centers (liver and muscles).
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