Consider a 25-mm-diameter and 15-m-long smooth tube that is maintained at a constant surface temperature. Fluids enter the tube at 50°C with a mass flow rate of 0.01 kg/s. Determine the tube surface temperatures necessary to heat water, engine oil, and liquid mercury to the desired outlet temperature of 150°C

Answers

Answer 1

Answer: ⚠this is not my answer it from hamzaahmeds

Water: h = 35.53 W/m².k

Engine oil: h = 18.84 W/m².k

Mercury: h = 1.19 W/m².k

Explanation:

Assuming the steady state, one-dimensional heat flow, it is clear that the added to the fluid by tube heat will be equal to the heat transfer through convection outside the tube.

Therefore,

mCΔT = hAΔT

mC = hA

h = mC/A

where,

h = convection coefficient

m = mass flow rate =  0.01 kg/s

C = specific heat capacity of fluid

A = surface area of tube = 2πrL = 2π(0.0125 m)(15 m) = 1.178 m²

FOR WATER:

C = 4186 J/Kg.k

Therefore,

h = (0.01 kg/s)(4186 J/Kg.k)/(1.178 m²)

h = 35.53 W/m².k

FOR ENGINE OIL:

C = 2220 J/Kg.k

Therefore,

h = (0.01 kg/s)(2220 J/Kg.k)/(1.178 m²)

h = 18.84 W/m².k

FOR LIQUID MERCURY:

C = 140 J/Kg.k

Therefore,

h = (0.01 kg/s)(140 J/Kg.k)/(1.178 m²)

h = 1.19 W/m².k


Related Questions

when the electrical connection to the alternator from the battery is not tight, it can cause?

Answers

Answer:

affects the flow of electricity

Explanation:

A loose battery terminal affects the flow of electricity. There is less power going to the electrical systems and the vehicle will not start or start sluggishly. Also, a loose battery terminal causes the car's electrical components like navigation, car lights, and audio among others to dim or fail completely.

To find the quotient of 8 divided by 1/3, multiply 8 by?
i need it asap but its should be 1 2 3 or 4 to answer


DONT GIVE ME LINKS ITS STUIPID JUST SAY A B C OR D

Answers

Answer: 8.33333333 or 6.1989778

Explanation:

true/False
1.
Around 50 percent of all sales of farm commodities are from dairy
products.

Answers

Answer:true

Explanation:

It is true that around 50 percent of all sales of farm commodities are from dairy products.

What are dairy products?

Dairy products or milk products, also known as lacticinia, are milk-based foods.

Cows, water buffalo, nanny goats, and ewes are the most common dairy animals. Dairy products include common grocery store foods such as yogurt, cheese, and butter in the Western world.

Milk, yogurt, cheese, lactose-free milk, and fortified soy milk and yogurt are all part of the Dairy Group. The Dairy Group excludes milk-based foods with low calcium and a high fat content. Cream cheese, sour cream, cream, and butter are all examples of this.

Dairy products account for roughly half of all farm commodity sales.

Thus, the given statement is true.

For more details regarding dairy products, visit:

https://brainly.com/question/1431669

#SPJ2

Do the coil resistances have any effect on the plots?

Answers

Because of the skin depth effect, the current at high frequency tends to flow at very low depth from radius. Then at high frequency the effective cross section of the wire is narrower than at DC.

Fro example skin depth at 100 kHz is 0.206 mm (0.008”), a wire more thicker than AWG26 could be a waste of copper, better use a bunch of thin wire (Litz wire) to rise the Q factor.

How to calculate total photon flux incident on the photodiode

Answers

Answer:

Use this PDF file it should help you calculate total photon flux incident on the photodiode.

Explanation:

It's a file on lecture notes that help people learn about engineering and maybe in the lecture notes it might have information about how to calculate total photon flux incident on the photodiode

a storage tank contains liquid with a density of 0.0361 lbs per cubic inch. the height of liquid in the tank is 168 feet. what is the pressure of the liquid at the bottom of the tank give your answer in psi

Answers

Answer:

Objects that float on water have densities less than the density of water; those that do not float on water have densisties greater than the density of water:

Float on water:  d < 0.0361 lb/in³ (where d denotes denisity)

Do not float on water:  d > 0.0361 lb/in³

Explanation:

I don't know if this works for it or not?

how long did it take you to answer all of these questions

Answers

Answer:

not sure

Explanation:

not sure

Presents the relevant parameters to be kept in mind when using the following types of motors: 1. AC induction motor 2. BLDC motor 3. Synchronous motor

Answers

Answer:

Presents the relevant parameters to be kept in mind when using the following types of motors: 1. AC induction motor 2. BLDC motor 3. Synchronous motorn

Explanation:

sorry

Answer: Hepatitis A

Explanation:

nagdudulot ng pamamaga ng atay

Let be the step response of the LTI system of impulse response (meaning the output of this system when its input is the unit step sequence). What is the limit of when goes to

Answers

Dude I rlly don’t know i not in college

ai lm dc bài tập môn cơ học vật liệu ko ạ

Answers

Answer:

What's that

Explanation:

Please brainlest me

Hierarchy of hazard control

Answers

Answer:

A system for controlling risk in the workspace.

effects of salinity water on alfalfa

Answers

It creates osmotic stress

why different types of
engines used gas turbine give reasons

Answers

Answer:

Four types of gas turbine engines are used to propel and power aircraft. They are the turbojet, turbofan, turboprop, and turboshaft.

Answer:

A gas turbine, also called a combustion turbine, is a type of continuous and internal combustion engine. The main elements common to all gas turbine engines are: ... Gas turbines are used to

Explanation:

why the power factor is Low in no load test in induction motor ?​

Answers

The reason for low power factor in no load test in induction motor is high rotor reactance at lower loading since the rotor reactance value gets decreased with increased loading on induction motor

Usually at no load, the Cosine of the phase angle between the stator current(I1) and the stator applied voltage(V1) is the power factor of an induction motor.

In conclusion, the reason for low power factor in no load test in induction motor is high rotor reactance at lower loading since the rotor reactance value gets decreased with increased loading on induction motor

Read more about induction motor

brainly.com/question/1049516

why people act like that

Answers

Answer:

i dob't know

Explanation:

People act like they care.

So, I act like I believe them.

The Web and Digital Communications pathway is broken down into four main categories of technology. Which category BEST describes Aaden's use of digital communication technology in the following example?

Aaden has created an advertisement that he plans to post on his website and various social media sites to promote his ski shop.

A.
Education

B.
Entertainment

C.
Information

D.
Marketing

Answers

D marketing because he’s advertising ski equipment to buy

How much work, in Newtons, is required to lift a 20.4-kg (45lb) plate from the ground to a stand that is 1.50 meters up?

ASAP PLS

Answers

Answer:

Explanation:

Work, U, is equal to the force times the distance:

U = F · r

Force needed to lift the weight, is equal to the weight: F = W = m · g

so:

U = m · g · r

   = 20.4kg · 9.81 [tex]\frac{N}{kg}[/tex] · 1.50m

   = 35.316 [tex]\frac{N}{m}[/tex]

   = 35.316 W

If the water surface elevation in reservoir B is 110 m, what must be the water surface elevation in reservoir A if a flow of 0.03 m3 /s is to occur in the cast iron pipe

Answers

The water surface elevation must be 110.2631 meters for a flow of 0.03m³ to occur in the cast pipe

For cast iron the chart has 0.0012  from Moody's chart

0.016 for cast iron

[tex]hf = \frac{flQ^{2}}{12.1d5}[/tex]

[tex]h1 = h2+\frac{Q^{2} }{12.1} [\frac{0.0012*100}{(12/1000)^5} +\frac{0.0016*150}{(15/100)^5} ][/tex]

[tex]h1 = 110m+\frac{0.03^2}{12.1} [\f\frac{0.12}{0.00032} +\frac{0.24}{0.000759} ]\\\\h1 = 110+0.0000744[375+3162.06]\\\\= 110 + 0.2631m\\\\= 110.2631m[/tex]

Therefore the water surface elevation must be 110.2631 meters for a flow of 0.03m³ to occur in the cast pipe

Read more on https://brainly.com/question/14081661?referrer=searchResults

I want to know if anyone else know how to tell apart real leather from fake leather?!?!

Answers

Answer:

yes i do.

Explanation:

it's pretty easy in my opinion but i dont know about you why do you ask?

In a shear cutting process, a sheet of soft cold-rolled steel has a thickness of 2 mm and a width of 1 m. The yield strength and the tensile strength is 175 MPa and 300 MPa, respectively. The clearance allowance value for the steel is 0.06. Determine the cutting force in N

Answers

Sorry I don’t know the answer I just need to answer some questions before I can get my own work done

Tech A says that the stoichiometric ratio is 14.7 gallons of air to 1 gallon of fuel. Tech B says it is 14.7 lb of air to 1 lb of fuel. Who is correct

Answers

The person that is correct as regards statement made about stoichiometric ratio is; Tech B

In air-fuel mixture, when there is a mix air and fuel in the ideal amounts to make an engine to run efficiently,the ideal ratio of air to fuel is known Stoichiometric ratio.

This stoichiometric ratio is the comparison between the weight of the air relative to the weight of the fuel that it has been mixed with.

Now, weight is in lb and as such, tech B is correct because his ratio is 14.7lb to 1 lb.

Read more at; https://brainly.com/question/16971089

Answer:

Tech B

Explanation:

I took the test and got it right

Other Questions
Pregunta seriaSi hago un pacto con el diablo y le digue de que me vaya pa el cielo me voy a el cielo o al infierno? help me please with my math 5p + 3 = 15 please convert this into a WORD PROBLEM what is the sequre of 9? 1. aqueduct choose all the apply (multiple question)2 pointsa. riverb. passagec. channeld. lake Calculate the altitude above the surface of Earth, in meters, at which the acceleration due to gravity is g 7. What are the slope and y-intercept of y=3x-5? Ensayo de acos general In a group of 34 students, 12 study both Art and Biology.14 study Biology but not Art.5 study neither subject.Given that a randomly selected student studies Art, what is the probability the student studies Art and Biology? How to find density of a gas. Which statement best conveys the literal meaning of the following metaphor?The ocean at night was a large pool of ink.1. The ocean was very dark.2. The ocean was made of ink.3. The ocean looked like a painting. Read the following excerpt from "Salvation":A great many old people came and knelt around us andprayed, old women with jet-black faces and braided hair,old men with work-gnarled hands. And the church sang asong about the lower lights are burning, some poor sinnersto be saved. And the whole building rocked with prayer andsong.What does the imagery in this passage communicate about Hughes?A. It reflects the excitement he felt.B. It indicates he was entertained by the scene going on around him.C. It shows how sad and ashamed he felt before he stood up to besaved.D. It highlights the pressure he felt to make a decision. URGENT! WILL GIVE BRAINLY FOR CORRECT ANSWER, AND NO LINKS Draw the image of \triangle ABCABCtriangle, A, B, C under a dilation whose center is PPP and scale factor is 222. PLS HELP. IM NOT GOOD AT THIS. The average precipitation for each month in central canada 7. Juanita is painting her house. She can eitherbuy Brand A paint and a paint roller tray oraBrand B paint and a grid for the paint roller. Forhow many gallons of paint would the price forboth options be the same? If Juanita needs 15gallons of paint, which is the better option? A furniture company charges 0.45 per poundfor shippingWrite an equation for the cost(y) of shippingx pounds.Use it to determine the cost of shipping a12-pound chair. Cardiorespiratory fitness, measured as VO2 max in mL/kg/min (maximum oxygen consumption), is associated with increased longevity. Recent evidence suggests that higher fitness increases the life span. Those with a low VO2 max have a life expectancy after 60 years of 7 years, those with moderate VO2 max of 15 years, and those with a high VO2 max have a life expectancy after 60 of 23 years. Which of the causal criteria is illustrated with this example solve |8y+4|=2|y-1|please show the work! Miguel takes $50 to the mall. He buys a flannel shirt for $18.99 and a hat for $12.49. On his way home, he stops at the bank and withdraws $25.How much money does Miguel have now?