Answer:
TRUE
Explanation:
An egg with an initial temperature 25C was place into a boiling water for 15 minutes. Heat from the boiling water enters the egg and changes its temperature gradually over time and space. Using the 2 dimensional finite element method, prove that the temperature of the egg varies from the shell to the center of the egg. You may need to develop your own nodes before start deriving the equations.
It is proved from the below that the temperature of the egg varies from the shell to the center of the egg.
Using the 2-dimensional finite element method, we will need to find the Biot number of the system by using the formula:
[tex]\mathbf{Bi = \dfrac{h_c r_o}{k} }[/tex]
According to the Heisler chart, the curves in the graph represent a range of values for the inverse of the Biot number,
where;
[tex]\mathbf{Bi = \dfrac{h_c r_o}{k} }[/tex]
here;
k = the material's thermal conductivity h = the heat transfer coefficient.By developing nodes based on assumptions;
[tex]\mathbf{Bi = \dfrac{1700 \times 0.025}{0.682} }[/tex]
Bi = 62.32
The inverse of Biot number is:
[tex]\mathbf{=\dfrac{1}{Bi}}[/tex]
[tex]\mathbf{=\dfrac{1}{62.32}}[/tex]
= 0.016
Similarly, the Fourier number [tex]\mathbf{F_o}}[/tex] is calculated by using the expression;
[tex]\mathbf{F_o = \dfrac{\alpha t }{r_o^2} }[/tex]
[tex]\mathbf{F_o = \dfrac{k t }{\rho c_pr_o^2} }[/tex]
where;
time (t) = 15 mins = (15 × 60) sec[tex]\mathbf{F_o = \dfrac{0.682 \times 15 \times 60 }{958.4 \times 4211 \times 0.025^2} }[/tex]
[tex]\mathbf{F_o = 0.243}[/tex]
Using the 2-dimensional finite element method, the temperature ratio is:
[tex]\mathbf{\dfrac{T(0,t) -T_{\infty}}{T_o -T_{\infty}} = 0.1 }[/tex]
T(0,t) = 100 + 0.1(4-100)
T(0,t) = 100 + 0.1(-96)
T(0,t) = 100 - 9.6
T(0, t) = 90.4° C
Therefore, we can conclude that it is proved that the temperature of the egg varies from the shell to the center of the egg.
Learn more about the Heisler chart here:
https://brainly.com/question/14839677?referrer=searchResults
Engineer It A water heater is a tank in which cold water is heated. Cold water flows into the tank to keep it full. A heating element warms the water inside the tank. The heated water can then be sent to hot water faucets in a building. Assume that a water heater design requires the hottest water possible to be sent to hot water faucets in a building. Where would be the best place for the hot water outlet pipe to be attached to the tank: the top, the middle, or the bottom of the tank? Explain your answer.
Answer:
i think it would be the top, the hotter the water the more pressure and sense pressure builds at the top of water heater tanks you would want the outlet pipe at the top
Explanation:
I think it would be the top, the hotter the water the more pressure and sense pressure builds at the top of water heater tanks you would want the outlet pipe at the top.
What is Heater?The process of transforming electrical current into heat energy is known as electric heating. An electrical resistor serves as the heating element in an electric heater, and heat is generated there when an electric current flows through it.
This procedure is frequently utilized in a wide range of domestic applications. from using an electric burner to prepare food, a kettle to boil water, and of course, house heating.
With one significant exception—they don't rely on a boiler and a system of pipes to produce the heat—electric heaters and radiators function exactly like your central heating radiators that are plumbed in.
Therefore, I think it would be the top, the hotter the water the more pressure and sense pressure builds at the top of water heater tanks you would want the outlet pipe at the top.
To learn more about Heating, refer to the link:
https://brainly.com/question/1429452
#SPJ2
Identify and explain the importance of Security Information and Event
Management (SIEM) .You are hire as a Information Security officer in Evincible
Securities .And you are going to move organization towards (SIEM) .
Security Information and events management describes an integration of Information and event management in the aspect of organizational security.
With Security Information and Event Management, organizations can effectively manage security logs of events and information using collected and filtered data in other to identify potential risk to networks and systems in real time. Gathered information could be used to create threat alerts and assign different level of priority based on specified rules and conditions.Hence, SIEM could leverage the capability of machine learning models and generated data in other build a robust security system.
Learn more : https://brainly.com/question/25675806
pls help me right now!
9514 1404 393
Answer:
A. 15 cm²
B. 15 cm²
Explanation:
A. Original FormulaThe diagram shows the values of a, b, h. Put these in the original formula to find the area.
A = 0.5(a+b)h
A = 0.5(3 +7 cm)(3 cm) = 0.5(10 cm)(3 cm) = 15 cm²
__
B. Splitting MethodThe base of each triangle is half the difference between the two base lengths.
triangle base = (7 -3)/2 = 2 . . . cm
The area of a triangle is given by the formula ...
A = 0.5bh
A = 0.5(2 cm)(3 cm) = 3 cm²
The area of the central rectangle is given by ...
A = bh
A = (3 cm)(3 cm) = 9 cm²
Then the area of the trapezium is ...
A(triangle) +A(triangle) +A(rectangle) = A(trapezium)
(3 cm²) +(3 cm²) +(9 cm²) = A(trapezium) = 15 cm²
explain the sphere gap method of measuring dc ac and impulse voltages
Answer:
The voltage to be measured is applied between the two spheres and the distance or spacing S between them gives a measure of the sparkover voltage. ... In the case of a.c. peak value and d.c. voltage measurements, the applied voltage is uniformly increased until sparkover occurs in the gap.
what is Agriculture and Environmental Engineering
Answer:
Agricultural engineers attempt to solve agricultural problems concerning power supplies, the efficiency of machinery, the use of structures and facilities, pollution and environmental issues, and the storage and processing of agricultural products.
In the figure, particle 1 of mass m1 = 3.1 kg slides rightward along an x axis on a frictionless floor with a speed of 5.0 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 4.6 kg. When particle 2 then reaches a wall at xw = 79 cm, it bounces from the wall with no loss of speed. At what position on the x-axis does particle 2 then collide with particle 1?
Answer:
We use Eq 9−67 and 9−68 to find the velocities of the particles after their first collision (at x=0 and t=0 )
ν
1f
−
m
1
+m
2
m
1
+m
2
ν
1i
=
0.30kg+0.40kg
0.30kg−0.40kg
(2.0m/s)=−0.29m/s
ν
2f
=
m
1
+m
2
2m
1
ν
1i
=
0.30kg+0.40kg
2(0.30kg)
(2.0m/s)=1.7m/s .
At a rate of motion of 1.7m/s,2x
w
=140cm (the distance to the wall and back to x=0 ) will be traversed by particle 2 in 0.82s . At t=0.82s , particle 1 is located at
x=(−2/7)(0.82)=−23cm ,
and particle 2 is " gaining " at a rate of (10/7)m/s leftward ; this is their relative velocity at that time . Thus , this "gap" of 23cm between them will be closed after an additional time of (0.23m)/(10/7m/s)=0.16s has passed . At this time (t=0.82+0.16=0.98s) the two particles are at x=(−2/7)(0.98)=−28cm
Explanation:
Las dos torres que sostienen un puente colgante tienen una separación de 240m y una altura de 110m a partir de la carretera, si el cable tensor más corto mide 10m, ¿cuál es altura de un cable que se encuentra a 100m de distancia del centro?
La altura es de 169.4 metros.
Dado que las dos torres que sostienen un puente colgante tienen una separación de 240m y una altura de 110m a partir de la carretera, si el cable tensor más corto mide 10m, para determinar cuál es altura de un cable que se encuentra a 100m de distancia del centro se debe realizar los siguientes cálculos, aplicando la ecuación parabólica:
(240)² = 4P x (110-10)57600 = 4P x 10057600 = 400P57600/400 = P144 = P 200 x 200 = 4 x 144 x (Altura - 100) 40000 = 576Altura - 57600 40000 + 57600 / 576 = Altura 169.4 metros = Altura
Por lo tanto, la altura es de 169.4 metros.
Aprende más en https://brainly.com/question/20333463
A cylindrical work part has a diameter and a height of both as 6cm. The coefficient of friction at the die work interface is 0.10. The work metal has a strength coefficient of 270MPa, yield strength of 110MPa, and a strain hardening exponent of 0.15. Determine the instantaneous force in N at a height of 4cm
Technician A states that about 33% of the heat energy created is wasted by being dumped straight out
of the exhaust to the atmosphere. Technician B states that 33% is wasted by internal friction and from
radiating off hot engine components straight to the atmosphere. Who is correct?
Select one:
A. Technician A
B. Technician B
C. Both A and B
D. Neither Anor B
Heat energy is the known to be a product of the movement of tiny particles called atoms, molecules or ions. The true statement is by Technician A.
Internal combustion engine is dependent on the heat of combustion so as to make torque to move the vehicle and power the system.
A lot of heat made during combustion is not often used productively and therefore need to be removed to avoid overheating of the engine.
The heat energy that is not used for is wasted in three ways: They are:
About 33% is wasted by being dumped straight out of the exhaust to the atmosphere. About 33% is wasted by the cooling system, which prevents overheating of the engine components. About 5% is wasted by internal friction and from radiating off of hot engine components straight to the atmosphere.Learn more from
https://brainly.com/question/14566159
As an engineer you are responsible for selecting and procuring pump for your water distribution system. After some background study you selected and purchased an 1160 rpm Taco 4013 FI and CI series pumps with a 12.75 impeller diameter (for details see the ppt slides for the pump chapter). After procuring the pump you realize that you should have purchased a similar pump but with a 2000 rpm.
Required:
a. What will be your approach to handle this situation?
b. How would you prepare a performance curve at 2000 rpm?
Which of the following classes of biomaterials would be most appropriate for fabricating an artificial tendon, a tissue that must sustain substantial deformation at low forces and quickly regain its original dimensions after stress release? Why ?
(a) Metals
(b) Ceramics
(c) Polymers
Twisting force is known as: A. thrust.
B. horsepower.
C. torque.
D. energy
10. "PPE is the control of last resort." What does this mean?
Answer:
protect the employee once the hazard into contact with them.
Find the distance of the line 3x + 4y + 5 = 0 from the point (2,-3).
Explanation:
The point on the line 3x + 4y = 5, which is equidistant from (1, 2) and (3, 4) is. Therefore, the point is (15, -10).
Twisting force is known as:
Select one:
A. thrust.
B. horsepower.
C. torque.
D. energy.
binary classification algorithm
Answer:
What is this exactly?
Explanation:
If your asking for the definition, binary classification is the task of classifying the elements of a set into two groups on the basis of a classification rule.
For the three-point bending test set up in this lab, what would be the shear force and moment distributions along the beam axis
Answer: So to calculate the flexural strength (σ), multiply the force by the length of the sample, and then multiply this by three. Then multiply the depth of the sample by itself (i.e., square it), multiply the result by the width of the sample and then multiply this by two
Explanation:
All of the following are common strategies for finding ideas EXCEPT
creating analogies.
O brainstorming with others.
examining existing products.
sitting and walng for inspiration.
Answer:
D. sitting and waiting for inspiration.
Explanation: Seems less reliable then then others
Write an
algorithm and draw a flowchart to convert the length in feet to
centimeter
Answer:
blah blah blah sh ut up read learn
pretty ako hjshjs ok.
Answer:
wala naman pong pic po wala kahit walang pic magan da parin
The process of refining specification involves
O defining the initial design.
O presenting the finished product to a client.
deciding whether or not to continue with a project.
O adjusting outcomes and making pragmatic changes.
Answer:
I'm not sure but I'm pretty sure it the second one (btw I'm sorry if this didn't help) :/
The following problem refers to triangle ABC, find all missing parts. Round degrees to 1 decimal places and
sides to the nearest whole number.
A = 36.5°C = 67.5°, c = 224 inches
A=
В.
C
O
O
490 do
a =
inches
inches
inches
C-
Answer:
A =41 .....
......
......
....C=21
How much electricity does a city with 1000 people require?
The average person needs 893 kWh per month.
So 1,000 people would need 893,000 kWh per month.
How is a scale model different from other types of models?
It is made with clay.
It includes many engineers' ideas.
It maintains correct spatial relations.
It is the last type of godel created in the design process
Answer:
A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used as a guide to making the object in full size.
Explanation:
Answer:
C.) It maintains correct spatial relations
Explanation:
Ong that's the answer
Where is Gotland Island?
O The Dead Sea
O The Caspian Sea
O The Baltic Sea
O The Mediterranean Sea
type the correct answer in the box Spell all words correctly
Damien wants to study the effect on a material's elasticity after it is submerged in water for varying durations. What type of graphical tool should
holin
Damien can stucty how the material behaves when immersed by using a
Curve
Damien can study how the material behaves when immersed by using a; Stress - Strain Curve
To determine the elasticity of a material, we need to find the elastic modulus because the elastic modulus is what quantifies the elasticity of the material.
Now, formula for elastic modulus is;
E = stress/strain
Now, to study the effect on a material's elasticity after it is submerged in water for varying durations, since elasticity is based on the stress and strain on the material, we need to draw a graph of stress vs strain which is also called a stress - strain curve.
The stress strain curve is a graphical tool that helps us know to know the amount of load a material can take before it will stretch and break.
Read more about stress - strain curves at; https://brainly.com/question/22394570
Why does a
generally decrease
with increasing
bond energy?
Answer:
What is the real meaning of this questions
Answer:
what whatwhat whatwhat the town hall meeting at the office in the morning and I can get you a new one for the kids
As the amplitude decreases in a wave the energy increasesTrue or false
Answer:
True
Explanation:
To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.
Anything that is made to meet a need or desire is?
a) Design
b) Technology
c) Process
d) Tool
Answer:
Technology
Explanation:
It’s made to meet desire
It should be noted that Anything that is made to meet a need or desire is Technology.
What is Technology?Technology can be regarded as the practical application of science.
Technology can be seen in areas such as
CommunicationTransportationAgricultureHowever, Technology came up because of the necessity for it, people desire it.
Learn more Technology at;
https://brainly.com/question/25110079