Answer:
[tex]\Delta p=-2.60bar\\ \\\Delta p=-0.260MPa[/tex]
Explanation:
Hello,
In this case, by using the Bernoulli equation:
[tex]p_1+\frac{1}{2}\rho v^2_1+\rho gh_1= p_2+\frac{1}{2}\rho v^2_2+\rho gh_2+\rho h_L[/tex]
Whereas [tex]h_L[/tex] accounts for the heat loss, so we can compute the change of pressure by:
[tex]p_1 +\frac{1}{2}\rho v^2_1+\rho gh_1= p_2+\frac{1}{2}\rho v^2_2+\rho gh_2+\rho h_L\\\\p_2-p_1=\frac{1}{2}\rho v^2_1+\rho gh_1-\frac{1}{2}\rho v^2_2-\rho gh_2-\rho h_L\\\\\Delta p=\rho *[\frac{1}{2}(v_1^2-v_2^2)+g(h_1-h_2)-h_L ][/tex]
Thus, we must first compute the velocity inside the 5-cm section by using the continuity equation:
[tex]v_2=v_1\frac{A_1}{A_2}=v_1*(\frac{\pi d_1^2/4}{\pi d_2^2/4} ) \\\\v_2=1.2m/s*\frac{8cm}{5cm}=1.92m/s[/tex]
It means that the change in pressure in Pa turns out (density is 1500 kg/m³ given the specific gravity of the fluid):
[tex]\Delta p=1500\frac{kg}{m^3} *[\frac{1}{2}((1.2\frac{m}{s})^2-(1.92\frac{m}{s})^2)+9.8m/s^2(0m-15.0m)-25\frac{m^2}{s^2} ]\\\\\Delta p=1500\frac{kg}{m^3}*(-1.1232\frac{m^2}{s^2} -147\frac{m^2}{s^2} -25\frac{m^2}{s^2} )\\\\\Delta p=-259684.8Pa[/tex]
Therefore, the change in pressure in bar and MPa turns out:
[tex]\Delta p=-259684.8Pa*\frac{1bar}{1x10^5Pa}=-2.60bar\\ \\\Delta p=-259684.8Pa*\frac{1MPa}{1x10^6Pa}=-0.260MPa[/tex]
Such negative sign means that the pressure at the 5-cm section is lower than the pressure at the 8-cm section.
Best regards.
Which phase change is exothermic? A) solid to liquid B) solid to gas C) liquid to solid D) liquid to gas
the change of phase is called liquid to gas
Answer:
It's liquid to solid.
Explanation:
Solid to liquid is becoming less compact, solid to gas is less compact, liquid to gas is less compact, but liquid to solid is more compact.
The mass number of a fluorine (F) atom is 19 . How many neutrons does it have
BALANCE:
__ Fe2O3 ---> __FeO + O2
after balancing find:
how many moles of FeO are produced from 8 moles of Fe2O3
SHOW WORK
According to the balanced equation 4Fe2O3 -> 6FeO + O2, we find that 4 moles of Fe2O3 produce 6 moles of FeO. Using this ratio, we can calculate that 8 moles of Fe2O3 will produce 12 moles of FeO.
To balance the equation:
Fe2O3 -> FeO + O2
We need to ensure that the number of atoms of each element is equal on both sides of the equation. Here's the balanced equation:
4Fe2O3 -> 6FeO + O2
From the balanced equation, we can see that 4 moles of Fe2O3 produce 6 moles of FeO.
To find how many moles of FeO are produced from 8 moles of Fe2O3, we can set up a proportion:
4 moles Fe2O3 / 6 moles FeO = 8 moles Fe2O3 / x moles FeO
Cross-multiplying and solving for x:
4 * x = 6 * 8
x = (6 * 8) / 4
x = 12
Therefore, 8 moles of Fe2O3 will produce 12 moles of FeO.
For more such question on equation. visit :
https://brainly.com/question/26694427
#SPJ8
Solid,liquid,gas how do they differ in how easily they change shape
Answer:Solid,Liquid,Gas differ from each other by the following ways:-
Solid:It have defined shape.
Liquid:They have an indefinite shape.
Gas:They have no shape:
An electrolyte is a substance that when dissolved in water, the solution will conduct electricity. A solution that conducts electricity well is said to contain a strong electrolyte. A solution that conducts electricity poorly even when a significant quantity of the solute is present contains a weak electrolyte. In contrast, a substance that does not conduct electricity when dissolved in water is a nonelectrolyte. Watch the video about the electrolytic properties of sodium chloride, NaClNaCl, and sugar.
Part A
Watch the animation, then check off the samples that will conduct electricity.
Solid sugar
Solid NaCl
NaCl solution
Sugar solution
SubmitHintsMy AnswersGive UpReview Part
Part B
A student tests four solids for their ability to complete an electrical circuit when dissolved in water by observing their ability to close a circuit containing a light bulb and obtains the following results:
Solid Concentration (M) Strength of light emitted
A 0.20 Bright
B 0.20 Dim
C 0.20 None
D 0.20 Bright
Which of the solids is a weak electrolyte when dissolved in water?
A
B
C
D
SubmitHintsMy AnswersGive UpReview Part
Part C
Look again at the table in Part B, repeated below.
Solid Concentration (M) Strength of light emitted
A 0.20 Bright
B 0.20 Dim
C 0.20 None
D 0.20 Bright
The student is told that one of the four solids tested is actually calcium bromide ,CaBr2. Which of the solids could be CaBr2?
A
B
C
D
SubmitHintsMy AnswersGive UpReview Part
Part D
This question will be shown after you complete previous question(s).
Answer:
Part A
NaCl solution
Part B
B 0.20 Dim
Part C
B
Explanation:
A strong electrolyte is usually defined as a substance that dissociates completely in solution to form ions.
A strong electrolyte will dissociate completely in solution and lead to a bright light. A nonelectrolyte will not light the bulb at all. A weak electrolyte or a substance that is not too soluble in water will produce a dim light.
Since CaBr2 is not as soluble in water as NaCl, it does not produce bright light as NaCl does hence 0.20 M solution of the solution will lead to a dim light.
How many significant figures does 0.0002 g
Answer:
1 significant figure
Explanation:
2. Balance the following equation:
__N2 + __ H2 = __NH3
__Cu + __S = __ Cu2S
__Fe2O3 + __C = __ Fe + __C
Fe₂O3 + 2Al →Al₂O3 + 2Fe
How many grams of aluminum oxide are produced
in the reaction?
Given balanced equation:
Fe₂O₃ + 2Al → Al₂O₃ + 2Fe
Molar masses:
Fe₂O₃: 159.69 g/mol
Al: 26.98 g/mol
Al₂O₃: 101.96 g/mol
The equation tells us that 1 mole of Fe₂O₃ reacts with 2 moles of Al to produce 1 mole of Al₂O₃.
Step 1: Calculate the number of moles of Al₂O₃ produced:
Using the mole ratio from the balanced equation, we find that the number of moles of Al₂O₃ is equal to the number of moles of Fe₂O₃ used.
So, the moles of Al₂O₃ produced = moles of Fe₂O₃ used = 1 mole.
Step 2: Convert moles to grams:
To convert moles of Al₂O₃ to grams, we multiply by the molar mass of Al₂O₃.
Grams of Al₂O₃ produced = moles of Al₂O₃ produced × molar mass of Al₂O₃
Grams of Al₂O₃ produced = 1 mole × 101.96 g/mol
Grams of Al₂O₃ produced = 101.96 grams
Therefore, 101.96 grams of aluminum oxide (Al₂O₃) are produced in the reaction.
Which metal has the ability to rust?
a gold
b silver
C iron
d aluminum
Answer:
iron
Explanation:
iron is the only metal in the answer choices that rusts because an oxidation reaction occurs as soon as it is exposed to water and oxygen.
For each obstacle, select the best solution. failing the classes needed to graduate from college: not being able to save enough money to pay for medical school: failing the state licensing exam:
Answer:
(A) getting study help, and retaking classes or exams
(A) applying for a loan
(C) getting study help, and retaking the exam
Explanation:
During which method of separation is one of the components of the mixture lost
What type of mixture can be separated by distillation?
Distillation. Distillation is an effective method to separate mixtures comprised of two or more pure liquids. Distillation is a purification process where the components of a liquid mixture are vaporized and then condensed and isolated.
Answer:
D. evaporation
Explanation:
I did the test on edge :)
explain the steps involved In the purification and treatment of drinking water
Answer:
1) Filter to remove insoluble substances from the water
2) Use carbon to remove odor.
3) Chlorine is used to kill bacteria.
Explanation:
Answer:
.Get a clean container or kettle.Pour in clean waterAnd then start boiling.Or u can put water guard in the cooked H2OFinish the statement: as wavelength
______, then energy______?
Options
Increases,decreases
Increases,increases
Decreases,decreases
There is no relationship between wavelength and energy
Thank You for helping
Answer:
increase and then decrease
Explanation:
as a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer. There are two basic types of waves: mechanical and electromagnetic
HOPE IT WORKS :)
is oil and water heterogeneous or homogeneous?
Please i need this answer for my online class
Answer:
They are examples of heterogeneous
Explanation:
By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers.
Classification of matter concept map
Answer:
The map is down below.
Explanation:
What is the charge of the ions formed by Na and by Cl?
Answer:
Na+ is positively charged as it loses an electron
Cl- is negatively charged as it gains an electron
3. A mercury lamp emits radiation with a wavelength of 4.36 x 10-7 m. Calculate the frequency of this radiation
Answer:
The frequency would be 6.88*10^14Hz
[tex]v=\frac{c}{lambda} = \frac{3.00*10^8 m/s}{4.36*10^-7m}[/tex]
We can solve the equation above to get the answer
The frequency of this radiation should be [tex]6.88\times 10^{14}\ Hz.[/tex]
Calculation of the frequencySince A mercury lamp emits radiation with a wavelength of [tex]4.36 \times 10^{-7}[/tex]m
So here the frequency should be
[tex]= c \div \lambda\\\\= 3.00 \times 10^{8} \div 4.36 \times 10^{-7} m.\\\\= 6.88\times 10^{14}\ Hz.[/tex]
Hence, we can conclude that The frequency of this radiation should be [tex]6.88\times 10^{14}\ Hz.[/tex]
Learn more about frequency here: https://brainly.com/question/21942441
How many grams are in 0.0664 mol of sodium
Answer:
1.5272 grams
Explanation:
We know that the mass of a given amount of an element is number of moles multiplied by the molar mass of the element
Molar mass of Sodium = 23 g/mol
Mass of sodium = Moles of Sodium * Molar mass of sodium
Mass of Sodium = 0.0664 * 23
Mass of Sodium in 0.0664 moles = 1.5272 grams
does the density of a liquid depend on its volume
Answer:
No
Explanation:
Increasing the level of component measured doesn't really significantly affect density, with exception of weight and volume. the above serves to make density an effective property in the identification of several materials.
How many mg does an 830 kg sample contain?
Answer:
A sample of 830 kg would contain 830000000 mg
Explanation:
What is a job of the skeletal system? 1. exchange oxygen and carbon dioxide 2. deliver nutrients to the body 3. remove waste 4. protect organs
Answer:
4 protect organs
Explanation:
this would be in biology category btw
Answer:
4.protect organs
Explanation:
your ribs protect your heart and lungs
wich is the largest planet in the solar system
venus
jupiter
saturn
earth?
Answer:
Jupiter
Explanation:
All of the following statements are true except:
a. elements are made of the same of atom
b. elements can be made of atoms or molecules
c. elements and compounds are listed on the periodic table
d.elements are symbolized by letters
What is the formula to describe the speed of light?
Answer:
Explanation:
Refer the image
What mass
(in kg) does 5.84 moles of titanium (Ti) have?
Answer:
so for every 1 kg it's 10 to the three. So we multiply 5.84 times 47.867 divided by 10 to the three, which is just 1000. Doing that should give you 0.280 kg of titanium.
Explanation:
The mass of 5.84 moles of titanium (Ti) is 0.279 kg.
What are moles?Moles can be defined as the amount of substances present in a system that contain the same number of entities as the number of atoms in 12g of carbon 12.
Given moles of Titanium = 5.84 moles
Molar mass of Titanium = 47.867 g
Mass = Moles x Molar mass
Mass of Titanium = 5.84 x 47.867
= 279.54g
To convert in kgs = 279.54 / 1000
= 0.279kg
Hence, the mass of 5.84 moles of titanium (Ti) is 0.279 kg.
To learn more about moles here
https://brainly.com/question/15209553
#SPJ2
A graduated cylinder( approximate as a regular cylinder) has a radius of 1. 045 cm and a high of 30.48 cm. what is the volume of the cylinder centimeter 3( use 3.141 for ) round to the nearest tenths
Given parameters:
Radius of cylinder = 1.045cm
Height of cylinder = 30.48cm
Unknown:
Volume of the cylinder = ?
A cylinder is a solid body. The volume is usually calculated using the mathematical expression below;
Volume of cylinder = π r² h
π = 3.141
r = radius of cylinder
h = height of cylinder
Now, input the parameters and solve;
Volume of cylinder = 3.141 x 1.045² x 30.48
= 104.547cm³
To the nearest tenth gives 104.5cm³
The volume of the cylinder is 104.5cm³
When is it best to use the displacement method to determine the volume of a solid? Select all that apply.
when the solid is insoluble in liquid
when the solid has straight edges of a common shape
when the solid has an irregular shape
when the solid dissolves in the liqui
Answer:
when the solid has an irregular shape
when the solid dissolves in the liquid
Explanation:
Starting with O; in inhaled air, describe in your own words the sequence of gas
movements from the inhalation of oxygen to the exhalation of carbon dioxide.
Answer:
We inhale oxygen through our nasal pasage and mouth, it passes epiglottis which leads air down to the lungs. It travels down the windpipe into right and left bronchi. Around alveoli (small air filled sacks) tiny capillaries bring blood to exchange gases. Oxygen moves from the lungs into the bloodstream and carbon dioxide moves from the bloodstream into the lungs where we exhale back from our mouth
Lonely lonly
What can I do?????
Answer:
i am
Explanation:
im lonly
The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlorine:
Step 1: Cl2(g)⇌2Cl(g)(fast)
Step 2: Cl(g)+CHCl3(g)→HCl(g)+CCl3(g)(slow)
Step 3: Cl(g)+CCl3(g)→CCl4(fast)
Part A
What is the overall reaction?
Express your answer as a chemical equation. Identify all of the phases in your answer.
Part B
What are the intermediates in the mechanism?
Express your answers as a chemical expression. If there is more then one answer, separate them by commas. Identify all of the phases in your answer.
Part G
What is the rate law predicted by this mechanism? (Hint: The overall reaction order is not an integer.)
Use a for [Cl2], b for [Cl], c for [CHCl3], d for [HCl], e for [CCl3] and k for the rate constant.
Answer:
Overall reaction equation is:
Cl2(g) + CHCl3(g) --> HCl(g) + CCl4(g)
The intermediates are Cl(g), CCl3(g).
Rate law= ka^1/2 c
Explanation:
This reaction is a non elementary reaction. A non elementary reaction is one that does not take place in a single reactive encounter. In other words, the reaction is comprised of many steps.
The overall reaction equation is the sum of all the reaction steps after all intermediates have been cancelled out. The rate law is obtained from the slowest step in the reaction sequence.
