The diameter water pipe is required to handle 0.075 m3/s and a 500 kpa pressure drop is 149.4mm.
The force applied perpendicularly to an object's surface, denoted by the symbol p or P, is stated to be applied per unit area that the force is claimed to be dispersed over. The pressure that is supposed to be related to the ambient pressure is called the gauge pressure, also known as gauge pressure.
[tex]Q=0.075m^3/s[/tex]
ΔP=500kPa
L=175m
e=2.5mm
Properties of water :
[tex]\rho=1000kg/m^3[/tex]
[tex]\mu=0.001N-s/m^2[/tex]
Reynold's number Re=ρVD/μ
where V= Q/A=Q/(π/4)[tex]D^2[/tex]=4Q/π[tex]D^2[/tex]
Re=(ρ(4Q/π[tex]D^2[/tex])D)/μ
=4ρQ/πDμ=4(1000kg/[tex]m^2[/tex])(0.075[tex]m^3[/tex]/s)/πD(0.001N-s/[tex]m^2[/tex])
Re=(95492.966/D)
Darcy friction formula
f=1.325/[ln(e/3.70+5.74/[tex]Re^{0.9}[/tex])[tex]]^2[/tex]
f=1.325/[ln(e/3.70+5.74/(95492.966/D[tex])^{0.9}[/tex])[tex]]^2[/tex]____(1)
from, [tex]h_L[/tex]=8fL[tex]Q^2[/tex]/g[tex]D^2[/tex][tex]\pi^2[/tex]
Δρ/ρμ=8FL[tex]Q^2[/tex]/[tex]\pi^2[/tex]g[tex]D^5[/tex]
500×[tex]10^3[/tex]Pa/(1000kg/[tex]m^3[/tex])=8f(175m)(0.075[tex]m^3[/tex]/s[tex])^2[/tex]/[tex]\pi^2[/tex][tex]D^5[/tex]
f/[tex]D^5[/tex]=626.642
f=626.642[tex]D^5[/tex]_____(2)
solving equation 1 and 2
we get f=0.0467 and D=0.1494m
D=149.4mm
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An alloy contains 64 g of pure gold and 32 g of pure zinc. what is the percentage of zinc in the alloy?
The answer of the the percentage of zinc in the alloy is 33.33%.
Mass percent is the mass of the element or solute divided by the mass of the emulsion or solute. The result is multiplied by 100 to give a percent. The formula for the quantum of an element in a emulsion is mass percent = (mass of element in 1 operative of emulsion / mass of 1 operative of emulsion) *100.
An alloy, metallic substance comprised of two or more elements, as either a compound or a solution. For example: Brass is an alloy of two metals: copper and zinc.
According to question,
Mass of pure Gold = 64g
Mass of pure zinc = 32 g
Now,
Total weight of alloy is = 64 + 32 = 96 gram
32 g of which is zinc
So percentage (%) of zinc in the alloy is 32/96*100 = 33.33 %
Hence, the percentage of zinc in the alloy is 33.33%.
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The rms speed of the molecules of a gas is 200 m/s at a temperature 300 k. what is the mass of the individual molecules?
The rms speed of the molecule is 200 m/s at a temperature of 300K. Then, the mass of the individual molecule is 3.11 ×10⁻²⁵ Kg.
Given,
The rms speed of the molecule (Vrms) = 200 m/s
The temperature of the molecule (T) = 300K
We have to find the mass (M) of individual molecules.
The expression for root mean square speed measures the speed of particles in a gas is given by:-
Vrms = √3KT/M
By squaring both sides we get,
(Vrms)² = 3KT/M
(200)² = 3 × 1.33 × 10 ⁻²³ × 300 / M
Or, M = 3.105 × 10⁻²⁵ Kg
Hence, the mass of the individual molecule is 3.105 × 10⁻²⁵ Kg.
The root mean square (R.M.S) speed V of the molecules of an ideal gas is given by the expression, v=sqrt(3RTM) and v=sqrt(3KTm) where R is universal gas constant, T is the absolute (Kelvin) temperature, m is the molar mass, K is Boltzmann's constant and M is the molecular mass.
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Rubidium has two common isotopes, rubidium-86 and rubidium-87. If the
abundance of rubidium-86 is 73.2% and the abundance of rubidium-87 is 26.7%,
then what is the average atomic mass of rubidium?
HELP ASAP
The average atomic mass of Rubidium with two common isotopes Rb-86 and Rb-87 is 86.09 amu.
According to the question,
Abundance of Rubidium-86 = 73.2%
Abundance of Rubidium-87 = 26.7%
Steps to calculate the average atomic mass of an element are:
Their percentage abundances are divided by hundred to obtain a decimal value.The obtained value of each isotope is multiplied by its atomic mass.All the isotopic values are added.Therefore,
Rb-86 = 73.2/100 = 0.732
Rb-87 = 26.7/100 = 0.267
Atomic mass of Rb-86 = 0.732 × 85.91 = 62.89 amu
Atomic mass of Rb-87 = 0.267 × 86.91 = 23.20 amu
Hence, the average atomic mass = 62.89 amu + 23.20 amu = 86.09 amu.
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Write a net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid and potassium hydroxide are combined. assume excess base.
The net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid and potassium hydroxide are combined is:-
H₂CO₃ + KOH ⇒ K₂CO₃ + H₂O
The reaction between an acid and base is known as a neutralization reaction.
In a neutralization reaction, an acid and a base react to produce a salt and water along with it.
Here H₂CO₃ is a weak acid and KOH is a base.
We have been given the information that the base i.e. KOH is present in excess amount.
Thus, the reaction between H₂CO₃ and KOH is as follows:
H₂CO₃ + KOH ⇒ K₂CO₃ + H₂O
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Notice that in the last problem you calculated the grams of oxygen needed. what would the volume of this oxygen be at stp? report your answer in liters to the nearest whole number.
The volume of oxygen required at STP is 7 L.
STP is a pressure of a hundred kPa and a temperature of 273.15 k. Or, 1 mole of any perfect gasoline occupies 22.7 L at STP.
therefore, we need to discover the range of moles of oxygen required within the reaction.
using the molar mass of water,
10.five g × 1 mole of water/ 18.02 g = 0.577 moles of water.
1: 2 is the ratio between oxygen and water in a water molecule, because of this 1 mole of oxygen produces 2 moles of water.
0.577 moles of H₂O × 1 mole O₂ / 2 moles of H₂O = zero.2885 moles O₂.
So, if 22.7 L at STP is occupied via 1 mole, then
zero.2885 × 22.7 L / 1 mole = 6.548 L
Rounded to the nearest entire wide variety, we get 7 L.
consequently, the quantity of oxygen at STP is 7L.
standard temperature and strain (STP) is described as 0oC (273.15K) and 1atm strain. The molar extent of a gasoline is the extent of 1 mole of a fuel at STP . At STP, one mole (6.02×1023 representative debris) of any gasoline occupies a volume of twenty-two.4L
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Which reactions are oxidation-reduction reactions? check all that apply. fes(s) 2hcl(aq) → h2s(g) fecl2(g) agno3(aq) nacl(aq) → agcl(s) nano3 2c3h6(g) 9o2(g) → 6co2(g) 6h2o(g) fe2o3(s) 3co(g) → 2fe(l) 3co2(g)
oxidation-reduction reactions are -
2C3H6(g) + 9O2(g) → 6CO2(g) + 6H2O(g)Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)For reaction,
2C3H6(g) + 9O2(g) → 6CO2(g) + 6H2O(g)On reactant side:
Oxidation state of Carbon = +2
Oxidation state of Oxygen = 0
On product side:
Oxidation state of Carbon = +4
Oxidation state of Oxygen = -2
Here, carbon's oxidation state is rising from +2 to +4. As a result, it is oxidizing and the oxygen's oxidation state is decreasing from 0 to -2. As a result, it is decreasing.
For reaction,
Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)
When reacting:
Iron's oxidation state is +3.
Carbon's oxidation state is +2.
On product side:
Iron's oxidation state is zero.
Carbon's oxidation state is +4.
Here, carbon's oxidation state is rising from +2 to +4. As a result, it is being oxidized and the iron's oxidation state is changing from +3 to 0. As a result, it is decreasing.
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The ph scale ranges from ____________ at its lowest to ____________ at its highest and measures the alkalinity of a solution.
Answer:
The pH scale ranges from 0-14.
Explanation:
Zero is the most acidic measurement while six would be the least acidic of the acids, seven is a pure substance, neither acidic nor basic, eight is the least basic measurement while 14 is the most basic of the bases.
Name one similarity and one difference between simple diffusion and facilitated diffusion.
The movement of particles from an area of high concentration to an area of lower concentration is known as Diffusion. There are two types of Diffusion; simple diffusion and facilitated diffusion.
Simple diffusion and facilitated diffusion have some similarities and differences.
Both simple diffusion and facilitated diffusion are passive processes and do not require energy. They both deliver transport molecules in the direction of a concentration gradient.
There are also some differences. The speed of simple diffusion is low as compared to facilitated diffusion. Simple diffusion does not require the assistance of carrier molecules but facilitated diffusion does.
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What is the approximate power per area emitted by the inside wall of an oven when baking a cake in w/m2?
The approximate power per area emitted by the inside wall of an oven when baking a cake in w/m2 is 6 x 3^4.
What is power per area?Comparing the surface power density of various industrial energy sources is crucial. Geographer Vaclav Smil popularised the idea. In the pertinent literature, the phrase is sometimes abbreviated to "power density," which may cause confusion with similar or homonymous concepts.
The power obtained per square metre of Earth's surface area utilised by a particular energy system, including all supporting infrastructure, manufacturing, fuel mining (if relevant), and decommissioning, is expressed in W/m2. Due to the high power density of fossil fuels and nuclear energy, substantial amounts of electricity may be produced in very small spaces at power plants.
6 x 3^4 (for reference Humans are about 300 K)
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The operations of a cell are directed by the:
What word or two-word phrase best describes the shape of the formaldehyde ( ch2o ) molecule?
Trigonal planar two-word phrase best describes the shape of the formaldehyde ( ch2o ) molecule
In formaldehyde carbon has four valence electrons, so it tends to make four bonds in covalent compounds. oxygen has six valence electrons, but as it tends to accept two, it tends to make two bonds in covalent compounds. hydrogen is almost always going to make only one bond, given that it only has one valence electron. 4+2+6=12 valence electron . in formaldehyde molecule carbon is on middle and double with oxygen am=nd single bond with 1 hydrogen and single bond with 1 hydrogen this make shape of formaldehyde called trigonal planar.
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Hi, i am almost done with my assignment, 2.11 Unit test chemistry of life, could i get help from someone who knows this type of questions? would get 5 stars and a few extra points well
A Scientist test a small section of a carrot root to determine the type of molecules were present. the results showed that the molecule contained carbon , hydrogen , and oxygen . the option d is correct (d) both (a) and (c)
(a)the molecule are a type of carbohydrate (c) the carrot contains some type of sugar.
Carrot is one of the important root vegetable rich in bioactive compounds. carbohydrates are made up of carbon , hydrogen and oxygen. carbohydrates are sugar molecules. The main three carbohydrates : sugar , starches and fiber. The carrot vegetable we eat is the taproot of carrot plant. The sucrose is major transport and storage sugar but it convert into starch. Carbohydrates provides energy for living things.
Thus, A Scientist test a small section of a carrot root to determine the type of molecules were present. the results showed that the molecule contained carbon , hydrogen , and oxygen . the option d is correct (d) both (a) and( c)
(a)the molecule are a type of carbohydrate
(c) the carrot contains some type of sugar.
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When a sugar crystal is placed in water, every time a sucrose molecule dissociates from the crystal, water molecules surround it in a cloud forming a(n):______.
A sugar crystal is placed in water, every time a sucrose molecule dissociates from the crystal, water molecules surround it in a cloud forming a hydration shell.
What is a hydration shell?
The term "hydration shell" refers to a more or less continuous cluster of water molecules that surround and are somewhat linked to another substance that the water molecules are drawn to because it is hydrophilic, or water loving.
Since there is space between matter particles and sugar crystals, the level of water does not significantly rise when sugar crystals dissolve in it, keeping the water level constant.
Thus, every time a sucrose molecule separates from a sugar crystal in water, a cloud of water molecules forms around the crystal, creating a hydration shell.
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Breaking a(n) _____ of an element into smaller particles will change its properties -- it would no longer be that element.
The answer would be an atom.
Atom : An atom is a tiny piece of a matter that unparalleled defines a chemical element.
An atom comprise of a mid nucleus that is neighbouring by one or more negatively charged electrons. The nucleus is positively charged and consist one or more relatively bulky particles known as protons and neutrons.
It is the littlest unit of an element.
Cannot be made or annul in a chemical reaction.
Atoms of various elements have various masses and chemical attributes.
Atoms merged in the ratio of compact whole numbers to form compounds.
Characteristics of an atom : atomic number, mass number and net charge.
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For the following 3 experimental set-ups identify:
1. the independent variable
2. the dependent variable
3. controlled variables
4. and then write a valid hypothesis for the experiment.
The independent variable is the type of liquid and the dependent variable growth of the plants.
What is an experiment?An experiment is used to establish the relationship between causes and effect in each of the following cases, let us determine the dependent and independent variable.
1) The independent variable is the type of liquid and the dependent variable growth of the plants. The constants are the plants and the land. A valid hypothesis is; "The growth of the plants depends on the type of liquid used to water the plants"
2) The independent variable is the mode of transport and the dependent variable is the time taken to reach the market. The constant is the distance covered. A valid hypothesis is; "The time taken to arrive at the grocery store depends on the mode of transport used"
3) The independent variable is the kind of app and the dependent variable is the battery life. The constant is the phone used while the hypothesis is; "Certain apps delete the battery faster than others"
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HELP !!!!!!!!!!!!!!!!!!!!!! When an object has a definite shape, how is it measured? Give an example of an object and the tool you would use to measure it.
Answer:
This means it is a solid, so a formula is used to measure it. The formula depends on its shape.
You would use a ruler to measure it.
Explanation:
You would use a ruler to measure it:
Ex. Shoebox
Rectangle Volume = length x width x height
V= l • w • h
Ex. Rubix Cube
Cube Volume = length x width x height
since all sides are equal, it is:
V= s3
What is the total kinetic energy of all particles that make up the matter called?
The average kinetic energy of the particles in a substance is measured by its temperature. It is a typical particle's kinetic energy.
The thermal energy of an object is equal to the sum of the kinetic energies of all its constituent particles.
Thermal power
The sum of all an object's atoms and molecules' energies makes up the substance's total energy. Both the potential energy resulting from the forces between molecules and the kinetic energy of the particles resulting from the motions of molecules within the substance and of atoms within molecules make up thermal energy. The sum of the kinetic and potential energies is all that constitutes mechanical energy. Simply put, this amount is the total mechanical energy (abbreviated as TME).
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Which actions would the nurse implement when a client develops an anaphylactic reaction? select all that apply. one, some, or all responses may be correct.
The nurse would want to call a rapid response, place the patient on oxygen, and prepare for the administration of Epinephrine. This drug is the first-line treatment for anaphylactic shock, and It will increase blood pressure, decrease swelling, and dilate the airway.
“Nursing is not an easy job. It takes physical and mental stamina to survive a 14-hour shift.” If you believe, you may find yourself thriving. in the midst of activity.
There is much to learn. The exams are difficult, the schedules are complex, and the challenges pile up. All these factors can make life as a student difficult. Nursing is a highly competitive field from the moment you start the application process until you graduate.
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a covalent bond involves: a. transferring of b. sharing protons c. transferring protons d. sharing electrons
A covalent bond involves: d. sharing electrons
The atoms of a molecule are held together by electrical forces that hold the atoms together, this is due to the electrical attraction between the electrons of the atom of one element and the nucleus of the other atom, this force of attraction is called covalent bond.
A covalent bond involves the sharing of electrons that are in the last energy layer of the atoms because they are the most likely or willing to be shared.
An example of a covalent bond is the bond between a hydrogen atom and a carbon atom in methane.
What is an atom?The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
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A concentration gradient exists in a solution when the concentration of solutes in the solution is:________
A concentration gradient exists in a solution when the concentration of solutes in the solution is the same everywhere.
The concentration gradient of a solute is the extrude in awareness in keeping with unit distance in answer. An awareness gradient is created with the aid of using diffusion among areas with one-of-a-kind concentrations of substances. Diffusion maintains till the densities of the 2 areas are equal.
A concentration gradient is a sluggish extra de withinside the awareness of a solute in the answer as a feature of distance withinside the answer. An answer essentially includes fundamental components: a solvent (an aspect that dissolves, together with water) and a solute (debris that dissolves withinside the solvent).
The distinction in the concentration of a substance from one place to other is known as an awareness gradient. An awareness gradient happens while there's an awareness distinction (interior and outside) withinside the cell. Concentration gradients are essential for molecular migration.
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How many seconds in a year? (Assume 30 days in an average month)
2.408 x 10²⁴ atoms of Co is how many grams?
Answer:
235.7 gm
Explanation:
58.933 gm/mole * 2.408 * 10^24 atoms / (6.022 x 10^23 atoms/mole)
= 235.7 gm
9.The density of mercury is 13.6 g/mL.
What is the mass in kilograms of a 2 L
commercial flask of mercury?
Answer:
27.2 kg
Explanation:
13.6 * 2 L of commercial flask of mercury = 27.2 kg.
Hope this helps! Have a good day! :D
Your general impression suggests that your immediate action should be to: ____.
a. call for additional help.
b. apply oxygen.
c. dress her burns.
d. apply spinal immobilization.
Your general impression suggests that your immediate action should be to call for additional help. The correct option is a.
What is immediate action?Immediate actions are the actions that are taken without taking any time. These actions are taken when there is no time to think, and you should immediately think about the actions. The emergency condition needs immediate help.
During the time of general impression, one should immediately call for additional help. Additional people will give you suggestions for the problem.
Thus, the correct option is a. call for additional help.
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Imagine a solution containing only water, sodium, and glucose. if a voltage is applied to the solution, glucose would move
Imagine a solution containing only water, sodium, and glucose. if a voltage is applied to the solution, there would be no net movement of glucose
The given declaration is wrong. Glucose answers aren't electrolytes and consequently do now no longer behavior power. Is sodium chloride an awesome conductor of power? Simply with the aid of using dissolving or dissolving it in water, it can not behavior power as a solid.
Saline includes Na+ and Cl- ions. If ions are gifted withinside the answer, those ions can pass thru the answer and convey an electric-powered current. Pure water and sugar answers do now no longer include widespread ions. glucose molecules do now no longer smash down into ions whilst dissolved.
When glucose is introduced to water, it dissolves without difficulty however now no longer dissociates into ions. Therefore, a glucose answer isn't an electrolyte and isn't a conductor of power.
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Convert the following to scientific notation.
1, 0,005 =
2. 5,050,=
3. 0,0008 =
4. 1,000 =
5. 1,000,000, =
6. 0.25 =
7. 0.025 =
8. 0.0025 =
9. 500 =
10. 5,000 =
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carbonic acid (h2co3) is a weak acid formed when carbon dioxide dissolves in water. what ions could be present in a carbonic acid solution?
carbonic acid (h2co3) is a weak acid formed when carbon dioxide dissolves in water. The ions present in a carbonic acid solution are H+ and HCO3–.
Carbonic acid is a weak acid with a chemical formula of H2CO3. In the presence of water, the partial dissociation of the carbonic acid occurs to produce H+ and HCO3– ions.
It is an inorganic compound also known as diprotic acid because it can form two types of salts; carbonates and bicarbonates. It is produced at industrial level as a by-product during the burning of the fossil fuels.
Carbonic acid is used to prepare carbonated water, sparkling wine. It can also be used to remove carbon dioxide from water.
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Gold has a density of 0.01932 kg/cm3. what volume (in cm3) would be occupied by a 22.2 g sample of gold?
The volume occupied by a 22.2 g sample of gold having a density of 0.01932 kg/cm3.
As we know that the density of a given substance is :
Density = mass/volume
Now to find the volume, reshuffle the formula:
volume = mass/ density
Now,
density = 0.01932 kg/cm3
mass = 22.2g = 0.0222 kg
Putting the values,
volume = 0.01932/0.0222
volume = 1.49 cm3
The volume is 1.49 cm3.
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What term refers to exercise that primarily uses the oxygen-dependent energy system, oxidative phosphorylation?
Aerobic refers to exercise that primarily uses the oxygen-dependent energy system, oxidative phosphorylation.
Aerobic Respiration is the method of cellular respiration that takes place in the presence of oxygen gasoline to produce electricity from food. This type of breathing is frequent in most of the plant life and animals, birds, humans, and different mammals. In this process, water and carbon dioxide are produced as quit products.
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The revival of jansenism, which centered on miracles that allegedly happened at the grave of a jansenist priest, is evidence of what development within french catholicism?
The evidence of the revival of Jansenism is the desire of ordinary people to connect themselves to what they saw as the direct work of God.
What is Jansenism?Jansenism is a theological movement that is done with the mixing of Catholicism. It was active in France's kingdom.
Primarily throughout the seventeenth and eighteenth centuries, Jansenism flourished inside Roman Catholicism before being denounced as heresy in 1653 by Pope Innocent X.
Thus, the yearning of common people to participate in what they perceived as God's direct action is proof of the rebirth of Jansenism.
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