To find the heat required, calculate the volume of metal melted, multiply by the melting factor, specific heat, and heat transfer factor.
(a) First, find the volume of the weld:
- Cross-sectional area of the weld = (pi * [tex]4.5^{2}[/tex]) / 2 = 31.81 mm²
- Weld volume = Area * Length = 31.81 * 250 = 7952.5 mm³
Next, calculate the amount of heat required:
- Heat required = Volume * Melting Factor * Specific Heat * Heat Transfer Factor
Assuming a specific heat of austenitic stainless steel as 500 J/kgK and density as 8000 kg/m³:
- Convert volume to mass: Mass = Volume * Density = 7952.5 * [tex]10^{-9}[/tex] * 8000 = 0.06362 kg
- Heat required = 0.06362 * 0.65 * 500 * 0.9 = 16.52 kJ
The heat required to melt the volume of metal in this weld is approximately 16.52 kJ.
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The amount of heat required to melt the metal in the U-groove weld is approximately 35,700 Joules, based on calculations involving volume, specific heat, and mass.
To determine the amount of heat required to melt the volume of metal in the U-groove weld, we can calculate the volume of the weld and then multiply it by the specific heat of the material.
The volume of the weld can be approximated as the volume of a cylinder with a semicircular cross-section. The formula for the volume of a cylinder is:
V = π * r^2 * h,
where V is the volume, r is the radius, and h is the height (length) of the weld.
Given:
Radius (r) = 4.5 mm = 0.0045 m
Length (h) = 250 mm = 0.25 m
Substituting the values into the volume formula:
V = π * [tex](0.0045 m)^2 * 0.25 m.[/tex]
Calculating this expression, we find:
V ≈ [tex]5.026 * 10^{(-6)} m^3.[/tex]
The specific heat (c) of austenitic stainless steel is approximately 500 J/(kg·°C).
To determine the mass of the metal in the weld, we need to consider the thickness and length of the weld.
The thickness of the stainless steel plate is 7.0 mm. Since the weld penetrates an additional 1.5 mm, the effective thickness is 8.5 mm = 0.0085 m.
The cross-sectional area (A) of the weld can be calculated as the area of the semicircle:
A = (π * [tex]r^2[/tex]) / 2.
Substituting the values:
A = (π * [tex](0.0045 m)^2) / 2[/tex].
Calculating this expression, we find:
A ≈ [tex]1.272 * 10^{(-5)} m^2.[/tex]
The mass (m) of the metal in the weld can be calculated by multiplying the density (ρ) of the stainless steel by the volume (V) and the cross-sectional area (A):
m = ρ * V * A.
The density (ρ) of austenitic stainless steel is approximately [tex]8000 kg/m^3.[/tex]
Substituting the values:
m ≈ [tex]8000 kg/m^3 * 5.026 * 10^{(-6)} m^3 * 1.272 * 10^{(-5)} m^2[/tex].
Calculating this expression, we find:
m ≈ 0.051 kg.
Finally, to calculate the amount of heat (Q) required to melt the metal in the weld, we can use the formula:
Q = m * c * ΔT,
where ΔT is the change in temperature, which is the melting point of the stainless steel.
The melting point of austenitic stainless steel is approximately 1400 °C.
Substituting the values:
Q ≈ 0.051 kg * 500 J/(kg·°C) * 1400 °C.
Calculating this expression, we find:
Q ≈ 35,700 J.
Therefore, the amount of heat required to melt the volume of metal in this U-groove weld is approximately 35,700 Joules.
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On planet Q, g = 2.24 m/s2. If the mass of planet Q is 8.96
1021 kg, what is the radius of planet Q?(G = 6.67 * 10-11 N
(m/kg))
a
8.95 x 1032 m
b 5.17 x 10 m
C 1.26 108 m
d 9.23 x 1024 m
e
4.72 x 106 m
Answer:
5.17 x 10^5
Explanation
The correct answer is (b) [tex]5.17*10^{5}m[/tex]
Let us consider an object of mass m on the planet Q.
On planet Q, let the acceleration due to gravity be g = 2.24 m/[tex]s^{2}[/tex]
Mass of the planet is M = [tex]8.96*10^{21} kg[/tex]
Let its radius be R
and the universal gravitational constant G = [tex]6.67*10^{-11} m/kg[/tex]
Gravitational Force acting on the object:
[tex]mg=\frac{GMm}{R^{2} }[/tex]
[tex]R=\sqrt{\frac{GM}{g} } \\R=\sqrt{\frac{6.67*10^{-11}*8.96*10^{21} }{2.24} }\\R=5.17*10^{5} m[/tex] is the radius of the planet Q.
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Why is the overall charge of the atom neutral or zero?
A. The zero charge on the neutrons in the nucleus create a neutral atom.
B. The number of protons is equal to the number of electrons
C. Equal numbers of neutrons, protons, and electrons work together to keep the charge of the atom neutral or zero.
D. Atoms are not electrical and therefore have no charge.
Answer:
B
Explanation:
this is because the neutrons do not have a charge, the things that have charge in an atom are electrons and protons.
and in the nucleus of an atom, there are protons and neutrons so you can see that A is not the answer
if you see the periodic table, you will know that the number of electrons and protons are equal, so the charges cancel each other out, hence the charge of an atom will be neutral
let me give you a tip which I got from my teacher, never write there is no charge in the atom, this suggests that there is no protons or electrons.
instead, write, the it is neutral
hope it helps if not please report it so that someone else gets to try it out
a dolphin that just manage to keep up with a speeding boat for a distance of 2km for a period of 3h in (answer in km/h)
Answer:
6km
Explanation:
3hours X 2km = 6 kilometres
A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is her acceleration? Is the acceleration higher of another cyclist who accelerates from 0 to 30 m/s in 8 seconds? How do you know?
Answer:
Acceleration of one cyclist=[tex]2.67m/s^2[/tex]
Yes, the acceleration is higher of another cyclist who accelerates from 0 to 30 m/s in 8 seconds.
Explanation:
We are given that
Initial velocity of one cyclist, u=0 m/s
Final velocity of one cyclist, v=8m/s
Time, t=3 s
Initial velocity of another cyclist, u'=0
Final velocity of another cyclist, v'=30m/s
Time, t'=8 s
We know that
Acceleration, [tex]a=\frac{v-u}{t}[/tex]
Using the formula
[tex]a=\frac{8-0}{3}=\frac{8}{3}=2.67m/s^2[/tex]
Acceleration of one cyclist=[tex]2.67m/s^2[/tex]
Acceleration of another cyclist, a'=[tex]\frac{30-0}{8}m/s^2[/tex]
Acceleration of another cyclist, a'=[tex]3.75m/s^2[/tex]
Yes, the acceleration of another cyclist is higher than the cyclist which accelerates from 0m/s to 8m/s.
PLS ANSWER FAST TIMED TEST WILL GIVE BRAINLY!!!!!!!!!
True or False?
It is easier to carry an empty backpack than a backpack full of books. This is an example of Newton’s 2nd law.
Answer:
The answer iis true
Explanation:
It is much easier to carry your backpack when it is empty rather than when it's full of textbooks (or soaked from the rain).
A 2 kg ball is thrown down with 50J of energy from a height of 10m, what is its velocity before it strikes the ground (neglect air resistance).
Answer:
V=14
Explanation:
PE=KE
mgh=1/2mv^2
(2)(9.8)(10)=1/2(2)v^2
(radical) 196=(radical) v
V=14
Use the image to answer the question. Which process enables the boy to see
over the wall?
A.diffraction
B.interference
C.reflection
D.refraction
HELLO
İ THİNK D
WHY D?
BCUESE SEN COK MALSİN ZAAA DAHA TÜRCE BİLMİYON MK
Electric field strength of a point charge is E. What is the electric potential at a point where electric field will be E/4?
Answer:
Explanation:
We shall find first the distance where electric field is E/4 .
Let the charge be Q and distance be d where electric field is E . From the coulomb's Law
E = k Q / d²
Let distance be d₁ where field is E/4
E/4 = kQ / d₁²
Dividing the two equation
4 = d₁² / d²
d₁ = 2d
We shall have to find Potential at d₁ which is equal to 2 d .
Potential at d₁
V = k Q / 2d
= kQ d / 2d²
= E d / 2 . where d is distance of the point where field is E .
One can expect good quality produce if proper attention is given to the proper
selection of planting materials. TRUE or FALSE ?
Answer:
True.
Explanation:
One can expect good quality produce if proper attention is given to the proper selection of planting materials.
1:What kind of energy does your body use to keep you warm.
2: What are two examples of something that stores chemical energy
3: All forms of energy can be transferred into what?
4: When energy changes from one type to another, this is called what?
5: Friction created by a car tire rubbing on a road creates what energy transportation? {blank} energy into {blank energy}
6: What type of energy transformation occurs when oil is used to heat a home? {blank} energy into {blank} energy? ( this is due today and it would really help me out if you could help me)
Answer:
1. thermal energy
2. Batteries and coal
4. energy conversion
The electromagnetic spectrum is divided into regions by Group of answer choices a.wavelengths and frequencies b.the way they are used c.speed d.colors
Answer:
Generally, by wavelengths and frequencies.
Colors only occur for a narrow portion of the spectrum.
The speed for these waves is c the speed of light regardless of wavelength.
The way they are used seems somewhat irrelevant.
The electromagnetic spectrum is divided into regions by wavelengths and frequencies. The spectrum is arranged in the order of increasing frequency.
What is electromagnetic spectrum ?The electromagnetic spectrum is the arrangement of waves in the order increasing frequency or decreasing wavelength. The order of the spectra starts from radio waves, microwaves, infrared, visible light, ultraviolet, x -rays and gamma rays.
The visible light that we can see is in between IR and UV rays. Hence, visible light has a frequency greater than IR rays but shorter than IR. Similarly visible light is longer than UV- rays but less frequency than UV rays.
Gamma rays are the most energetic and shorter waves in the electromagnetic spectrum with smaller wavelength and greater frequency. Hence, options a is correct.
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Which of the following is a compound that would
be the most soluble in water? (DOK 2)
O A nitrogen triargonide
O B. carbon tetrachloride
O C. lithium fluoride
O D. magnesium disulfide
Lithium fluoride will be most soluble in water because it is most strongly ionic.
What is solubility?Solubility is the amount of a substance that dissolves in a given volume of solvent at a particular temperature.
Solubility is affected by:
nature of substance: ionic substances are more soluble nature of solvent: polar solvents dissolves polar distance while non-polar solvents dissolve non-polar substances.temperature: solutesdissolve more at higher temperatureWater is a polar molecule.
Lithium fluoride will be most soluble in water because it is most strongly ionic.
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PLS HELP. PLEASE. What is the role of DNA in determining an organism’s traits?
Answer using these words: DNA, chromosome, gene, allele, dominant, recessive
Answer:
DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies
An 6 kg object accelerating from 17 m/s to 10 m/s. What is the change in momentum of the object?
Answer:
- 42
Explanation:
m = 6kg
vi = 17 m/s
vf = 10 m/s
delta mv = ?
Formula
delta mv = m*(vf) - m(vi)
delta mv = 6(10 - 17)
delta mv = 6(-7)
delta mv = - 42 kg m/s
PLEASE HELP ME!!!! i will give brainliest to whoever gets it right
Answer:
I believe the answer is B.)
manganese dioxide is used in the dry cell as
Answer:
Electrolytic manganese dioxide (EMD) is used in zinc-carbon batteries together with zinc chloride and ammonium chloride. EMD is commonly used in zinc manganese dioxide rechargeable alkaline (Zn RAM) cells also. For these applications, purity is extremely important.
Explanation:
hope this helps...
14. If 100 grams of sodium nitrate are dissolved in 100 grams of water
at 60 degrees C, is the solution formed saturated, unsaturated, or
supersaturated?
Answer:
Unsaturated
Explanation:
the solubility of sodium nitrate is at 60 C is 124g/ml therefore, putting 100 grams will not saturate fully.
3. The only way to protect against the damage from a collision is to reduce the
by wearing what protective football gear?
some knee pads for soccer
The effect of collision during a soccer game can be minimized by wearing a shin protection gear called the shin guard.
The protection gear is usually worn in other to palliate the effect of collison during sporting activities.
As for football, the most vulnerable part of the body which is usually prone to damage during collision is the shin or knee.
Therefore, players often wear shin protection gear in other to minimize the risk of damage during collision.
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The unit of power of a lens is.
(a) Metre
(b) Dyne
(c) Dioptre
Answer:
c. dioptre that's the answer.
The equation below represents the process that you observed. Balance the equation. What type of reaction?
6CO2 + 6H2O + light energy = 0C6H12O6 + 6O2 _______________________
That looks like photosynthesis to me and I think that should be an endothermic reaction because it requires energy.
what is the resistance of an object that produces a current of a 6 A and has a voltage of 30
Answer:
this is the answer the required questions
hope you like this
The dog has ran 100 meters in 20 seconds and then 300 meters in 25 seconds what was the average speed of the dog over the entire time it was running
Explanation:
the speed of the dog was 400
True or false: Energy is everything and the whole universe is governed by energy
Answer:
True
Explanation:
I took the test
The change in frequency of a wave as its source moves in relation to an observer.
A)
Ultrasound
B)
Frequency
C)
Doppler Effect
D)
Echo
Answer: B) Frequency
Explanation:
What is the net force in this image?
a
8000 N right
b
5000 N right
c
4000 N right
d
4000 N left
e
5000 N left
f
8000 N left
Answer:
4000N left
Explanation:
6000N-1000N-1000N
6000N-2000N
8000N
Are moons 1-4 waxing are waning ?
Answer:
I want to help you but i cant.
Explanation:
please provide a screenshot or photos of moons 1-4
Discuss how the motion of the stunt cyclist relates to the forces acting on the stunt cyclist during the collision
Answer:
hello your question is incomplete hence I will give you a general answer on how a stunt cyclist performs his stunts successfully
answer ;
The stunt cyclist trying to perform some sort of stunt with the bicycle will be faced with some forces like the static fiction between the tires of the bicycle and wall and also a centripetal force.
In order to overcome the centripetal force the minimal grip of the bicycle must be equal to the weight and the speed at which the cyclist must go can be represented as :
[tex]V_{min} = \sqrt{\frac{r.g}{u} }[/tex]
Explanation:
The stunt cyclist trying to perform some sort of stunt with the bicycle will be faced with some forces like the static fiction between the tires of the bicycle and wall and also a centripetal force.
In order to overcome the centripetal force the minimal grip of the bicycle must be equal to the weight and the speed at which the cyclist must go can be represented as :
[tex]V_{min} = \sqrt{\frac{r.g}{u} }[/tex]
where ; r = radius of the tunnel where the stunt is to be performed
g = gravitational speed
u = coefficient of static friction
water is used in car radiators as coolant because of
Water is used as a coolant in automobiles radiators because it has high specific heat capacity. So, it absorbs a large amount of heat for a degree rise in temperature.
Explain how is the voltage across a resistor measured?
Answer:
You take the basic formula of E = I x R, solve for R -> R = E / I. In other words, take the required voltage drop (in volts) and divide by the current (in amps) in the resistor and determine the resistance (R) in ohms.
Explanation: hope this helps
A 2 kg ball is thrown down with 50J of energy from a height of 10m, what is its velocity before it strikes the ground (neglect air resistance)
Answer:
Explanation:
Given the following data;
Mass = 2kg
Energy = 50J
Height = 10m
To find the speed
Kinetic energy can be defined as the energy possessed by a body due to its motion.
K.E = ½mv²
Substituting into the equation, we have;
50 = ½*2*v²
V² = 50
Taking the square root of both sides, we have;
V = 7.07m/s