A straight razor is properly balanced when:

Answer:

Number of atoms will be "8 atoms/cell". The further explanation is given below.

Explanation:

The given values are:

a = 0.45258 nm

b = 0.45186 nm

c = 0.76570 nm

Atomic radius = 0.1218 nm

Density = 5.904 g/cm³

Atomic weight = 69.72 g/mol

Now,

The volume of unit cells will be:

⇒  \(V=a_{0}b_{0}c_{0}\)

On putting the estimated values, we get

⇒      \(=0.45258\times 0.45186\times 0.76570\)

⇒      \(=0.1566 \ nm^3\)

⇒      \(=1.56\times 10^{-22} \ cm^3\)

(a)...

From equation of density we get,

⇒  \(Density=\frac{(x \ atoms/cell)(Atomic weight)}{(Volume)(6.02\times 10^{23} \ atoms/mol)}\)

⇒  \(5.904=\frac{x\times 69.72}{(1.566\times 10^{-22})(6.02\times 10^{23})}\)

⇒        \(x=8 \ atoms/cell\)

(b)...

From equation of PF we get,

⇒  \(PF=\frac{(3 \ atoms/cell)(\frac{411}{3} )(0.1218)}{0.1566}\)

⇒         \(= 0.387\)

The number of atoms in each unit cell and the packing factor in the unit cell are;

a) Number of atoms in each unit cell = 8 atoms

b) Atomic packing factor = 0.3876

We are given;

a = 0.45258 nm ≈ 0.45258 × 10^(-7) cm

b = 0.45186 nm = 0.45186 × 10^(-7) cm

c = 0.76570 nm = 0.7657 × 10^(-7) cm

Atomic radius; r = 0.1218 nm = 0.1218 × 10^(-7)

density; ρ = 5.904 g/cm³

Atomic weight = 69.72 g/mol

Avogadro's number = 6.02 × 10²³ atom/mol

a) The number of atoms per cell is calculated by clearing it from the equation;

Number of atoms/cell = (ρ × cell volume × Avogadro number)/atomic weight

Where;

cell volume = a × b × c

Cell volume = 0.45258 × 10^(-7) × 0.45186 × 10^(-7) × 0.7657 × 10^(-7)

Cell volume = 1.5659 × 10¯²² cm³

Thus;

Number of atoms per cell = (5.904 × 1.5659 × 10¯²² × 6.02 × 10²³)/69.72

Number of atoms per cell = 7.9 atoms

Number of atoms per cell = 8 atoms

b Formula for the packing factor is calculated from the formula:

FE = (number of atoms per cell x atom volume)/cell volume

Formula for atom volume is;

Atom volume = 4πr³/3

Atom volume = (4π × 0.1218 × 10^(-7))³/3

Atom volume = 7.5875 × 10¯²⁴ cm³

Thus;

FE = (8 x 7.5875 x 10¯²⁴)/(1.5659¯²²)

FE = 0.3876

Read more about atomic packing factor at; https://brainly.com/question/6610542

The choice is a good reason to segment a network as the network segments that are more accessible to the Internet are known by new term is screened subnet.

A subnet mask is a 32-bit numeral formed by setting keeper bits to all 0s and developing network times to all 1s. In this way, the subnet mask divides the IP speech into the network and host addresses.

A subnet mask is used to separate an IP address into two pieces. One element defines the host (computer), and the different part identifies the network to which it belongs.

Therefore, The choice is a good reason to segment a network as the network segments that are more accessible to the Internet are known by new term is screened subnet.

Learn more about IP speech on:

https://brainly.com/question/16011753

#SPJ1

Answer:

0.02795 m

Explanation:

Neglecting shaft weight Design the shaft using maximum shear stress theory and determine the required diameter

factor of safety = 1.5

length of shaft = 10 meters

material yield strength = 350 MPa

Torque = 500 N.m

The required shaft diameter = 0.02795 m

attached below is a detailed solution of the problem

Answer:

To calculate the steady state flux of atomic hydrogen through a steel vessel, we need to use Fick's first law, which states that the flux (J) is equal to the diffusivity (D) multiplied by the concentration gradient (dC/dx).

First, we need to calculate the concentration gradient by dividing the difference in hydrogen concentration between the inside and outside surfaces by the wall thickness of the vessel. The inside surface is kept saturated with hydrogen at a concentration of 4.5 moles/m3, and the outside surface is exposed to the atmosphere, which has a hydrogen concentration of 0 moles/m3. Therefore, the concentration gradient is (4.5 - 0) moles/m3 / (4 mm) = 1.125 moles/m3 mm.

Next, we need to substitute this value into Fick's first law along with the diffusivity of hydrogen in steel, which is given as 0.1 mm2/s. This gives us the steady state flux as J = (-0.1 mm2/s) * (1.125 moles/m3 mm) = -0.01125 moles/s mm2.

Finally, we need to convert the units of the flux from moles/s mm2 to moles/s m2. To do this, we can multiply the flux by 1,000 to convert the units of millimeters to meters, giving us a final steady state flux of -0.01125 moles/s mm2 * 1,000 = -1.125 moles/s m2.

IF THE VESSEL CONTAINS 20 MOLES OF HYDROGEN, CALCULATE THE TIME TAKEN TO DISSIPATE ALL OF THE HYDROGEN OF THAT THE VESSEL HAS A SURFACE AREA OF 3 M2.

To solve this problem, we need to first calculate the flux of atomic hydrogen through the vessel using Fick's first law:

J = -D(dC/dx)

where J is the flux, D is the diffusivity of hydrogen in steel, and dC/dx is the concentration gradient.

Given that the diffusivity of hydrogen in steel is 0.1 mm2/s, the inside concentration is 4.5 moles/m3, and the outside concentration is 0, the concentration gradient is 4.5 moles/m3.

Plugging these values into the equation above, we get:

J = -0.1 mm2/s * 4.5 moles/m3 = -0.45 moles/s-m2

Next, we need to calculate the time it takes to dissipate all 20 moles of hydrogen from the vessel. We can do this by dividing the total number of moles of hydrogen by the flux:

t = 20 moles / (-0.45 moles/s-m2) = 44.44 s

So it would take approximately 44.44 seconds to dissipate all of the hydrogen from the vessel.

Explanation:

SELF EXPLANATORY

The time taken is 44.44 seconds to dissipate all of the hydrogens from the vessel.

To solve this problem, we need to first calculate the flux of atomic hydrogen through the vessel using Fick's first law:

J = -D(dC/dx)

where J is the flux, D is the diffusivity of hydrogen in steel, and dC/dx is the concentration gradient.

Given that the diffusivity of hydrogen in steel is 0.1 mm²/s, the inside concentration is 4.5 moles/m³ and the outside concentration is 0, the concentration gradient is 4.5 moles/m³.

Plugging these values into the equation above, we get:

J = -0.1 mm²/s * 4.5 moles/m³ = -0.45 moles/s-m²

Next, we need to calculate the time it takes to dissipate all 20 moles of hydrogen from the vessel. We can do this by dividing the total number of moles of hydrogen by the flux:

t = 20 moles / (-0.45 moles/s-m2) = 44.44 s

So it would take approximately 44.44 seconds to dissipate all of the hydrogen from the vessel.

Learn more about hydrogen on:

https://brainly.com/question/24433860

#SPJ1

Answer:

b

Explanation:

The rate of heat transfer by the air conditioner using constant specific heat of 1.004kj/kg.K is 15.06 kW.

Rate of heat transfer is the power rating of the machine.

Work done and changes in potential and kinetic energy are neglected since it is a steady state process.

The specific heat in terms of specific heat capacity and temperature change is given as:

\(q_{out} = Cp(Ti - Te)\)

\(q_{out} = 1.004(30 - 10) = 20.08 kJ/kg \\ \)

The rate of heat transfer, is then determined as follows:

Qout = 0.75 × 20.08 = 15.06 kW

Therefore, the rate of heat transfer by the air conditioner is 15.06 kW.

Learn more about rate of heat transfer at: https://brainly.com/question/17152804

#SPJ1

Answer:

a) 4-input XOR, input data-1001  = 0 Even parity Bit

b)  5-input XOR, input data-10010 = 0 Even parity Bit  

c) 6-input XOR, input data-101001 = 1 Even parity Bit

d) 7-input XOR, input data 1011011 = 1 Even parity Bit

Explanation:

a) 4-input XOR, input data-1001  ;  generates 0 Even parity Bit

b)  5-input XOR, input data-10010 ; generates 0 Even parity Bit  

c) 6-input XOR, input data-101001 ; generates 1 Even parity Bit

d) 7-input XOR, input data 1011011 ; generates 1 Even parity Bit

Attached below is the Logic circuits of the data inputs

kh.1 = Pie, kH.2 = Pema1 + fx. kh.1 is the Henry's law constant for component 1, kH.2 is the Henry's law constant for component 2.

The expression P1 = x, Pie implies that the vapor pressure of component 1, P1, is directly proportional to its mole fraction, x, and the pure component vapor pressure, Pie. Thus, dividing P1 by x gives us Pie, which is the Henry's law constant for component 1 (kh.1). Similarly, the expression P2 = x, Pema1 +fx represents the vapor pressure of component 2, P2, as a function of its mole fraction, x, and a combination of the pure component vapor pressure, Pema1, and the mole fraction of component 2, f, multiplied by x. Dividing P2 by x yields Pema1 +fx, which is the Henry's law constant for component 2 (kH.2).

learn more about Henry's law here:

https://brainly.com/question/30636760

#SPJ11

The correct answer is To calculate the discrete settling velocity of a grit particle, we can use the following formula:

\(V_s = (2/9) * (ρ_p - ρ_f) * g * r^2 / η\)

V_s = discrete settling velocity

ρ_p = density of particle

ρ_f = density of fluid

g = acceleration due to gravity

r = radius of particle

η = dynamic viscosity of fluid Given that the radius of the grit particle is 0.05mm and its specific gravity is 2.65, we can calculate its density as:

ρ_p = specific gravity * ρ_water

\(= 2.65 * 1000 kg/m^3= 2650 kg/m^3\)

At a water temperature of 20°C, the dynamic viscosity of water is\(1.004 × 10^-6 m^2/s,\)which we are given.

The density of water at 20°C is approximately \(1000 kg/m^3,\) and the acceleration due to gravity is\(9.81 m/s^2.\)

Substituting these values into the formula, we get:

\(V_s = (2/9) * (2650 - 1000) * 9.81 * (0.05 × 10^-3)^2 / (1.004 × 10^-6)= 0.086 m/s\)(rounded to three decimal places)

Therefore, the discrete settling velocity of the grit particle is approximately 0.086 m/s.

To learn more about  settling velocity  click on the link below:

brainly.com/question/29519833

#SPJ1

At amateur operating frequencies, the FTDX10 is designed for 50 Ohm resistive impedance.

Impedance is the sum of resistance and reactance. It was defined as anything that can obstructs the flow of electrons within the electrical circuit. As a result, it influences current generation in the electrical circuit. It could be found in all the possible circuit components and across all possible electrical circuits. Impedance is represented mathematically by the letter Z and has the unit ohm. It's a mix of resistance and reactance.

Z stands for impedance, which is an expression of the resistance to alternating and/or direct electric current that an electronic component, circuit, or system offers. Resistance and reactance are two independent scalar (one-dimensional) phenomena that make up the vector (two-dimensional) quantity known as impedance.

To learn more about Impedance refer to :

https://brainly.com/question/13134405

#SPJ4

Answer:

  0 ft

Explanation:

The equation of the plane can be found from the cross product AC×BC. That vector is ...

  N = (2, 11, -6) × (-3, -6, 4) = (8, 10, 21)

Then the equation of the plane is ...

  8x +10y +21z = 14 . . . . . 14 = N·A

Point P satisfies this equation, so is on the plane. The distance is 0 feet.

  8(9) +10(11) -8(21) = 72 +110 -168 = 14

Answer:

Explanation:

If the museum is running short of funds, and you decide to increase revenue. An increase or decrease in the price of admission into the museum depends on the following:

1. If demand for admission into the museum is elastic there are two possible outcomes

a. An increase in the price of admission leads to a decrease in the quantity demand of admission into the museum

b. A decrease in price of admission into the museum leads to an increase in the quantity demand of admission into the museum.

This follows the law of demand which states that "the higher the price, the lower the quantity demanded and the lower the price, the higher the quantity demanded".

2. If the demand for admission into the museum is inelastic, then an increase in price will lead to an increase in revenue of the museum.

Therefore, before the curator increase the price of admission into the museum, he should first determine the price elasticity of demand of the museum.

I'd say number 4, number 3 looks like an exhaust valve

Answer:

Two waves must be having same wavelength, frequency, amplitude and travelling in the opposite direction.

Answer:

if user_tickets == 7:

  award_points = 1

else:

  award_points = user_tickets

Explanation:

Not sure what language you are using. But this can be used for python. Also don't know if you are required to ask the user for any input

Assuming quicksort always chooses a pivot that divides the elements into two equal parts, the answers are:
1. The number of partitioning levels required for a list of 8 elements is 3.
2. The number of partitioning levels required for a list of 1024 elements is 10.
3. The total number of comparisons required to sort a list of 1024 elements is 9217.

Step-by-step explanation:

1. For a list of 8 elements with an ideal pivot that divides the elements into two equal parts, the number of partitioning levels required is 3. Here's a step-by-step explanation:
- Level 1: 8 elements are divided into 2 groups of 4 elements each.
- Level 2: Each group of 4 is divided into 2 groups of 2 elements each.
- Level 3: Each group of 2 is divided into 2 groups of 1 element each (sorted).

2. For a list of 1024 elements with an ideal pivot that divides the elements into two equal parts, the number of partitioning levels required is 10. This is because 2^10 = 1024. In each level, the number of elements in each group is halved, so after 10 levels, there will be groups of 1 element each (sorted).

3. To calculate the total number of comparisons required to sort a list of 1024 elements using quicksort with an ideal pivot, we can use the formula n * log2(n) - n + 1.

In this case, n = 1024:
- 1024 * log2(1024) - 1024 + 1 = 1024 * 10 - 1024 + 1 = 10240 - 1024 + 1 = 9217.
So, a total of 9217 comparisons are required to sort a list of 1024 elements with an ideal pivot.

Learn more about quicksort: https://brainly.com/question/17143249
#SPJ11

If quicksort always chooses a pivot that divides the elements into two equal parts, then we can assume that the algorithm will use the median element as the pivot.

1. For a list of 8 elements, quicksort with this assumption will require 3 partitioning levels. The first partitioning will divide the list into two equal parts, each with 4 elements. The second partitioning will divide each of these parts into two equal parts, each with 2 elements. Finally, the third partitioning will divide each of these parts into two equal parts, each with 1 element. 2. For a list of 1024 elements, quicksort with this assumption will require 10 partitioning levels. Each level will divide the list into two equal parts, and since 2^10 = 1024, we need 10 levels to reduce the list to single elements. 3. The total number of comparisons required to sort a list of 1024 elements using quicksort with this assumption can be calculated using the formula 1024 * log2(1024), which is approximately 10,240 comparisons. This is because each level of partitioning requires comparisons between each element and the pivot, and there are a total of 10 levels of partitioning.

Learn more about algorithm here-

https://brainly.com/question/22984934

#SPJ11

Based on the maximum capacity as a result of the pipe-laying operations, and the maximum capacity without obstruction to the four-lane dual carriageway, the mean speed of traffic in the bottleneck is -2.73km.

This can be found as:

= (Maximum restricted capacity - freeflowing rate) / (Kb - Ka)

= (1,100 - 1,500) / (209 - 62.5)

= -2.73 km/h

The rate that the queue outside the bottleneck grows is:

= Free flowing rate - (mean speed of traffic x ka)

= 1,500 - (-2.73 x 62.5)

= 1,670 veh/hour

Find out more on bottleneck at https://brainly.com/question/9551615

#SPJ1

Answer:

volunteer coordinator

Explanation:

because they are volunteering for that and in most of the cases they do not expect to be paid

The elbow of the pipe has an outer radius of 0.75 in. and an inner radius of 0.63 in. if the assembly is subjected to the moments of M 25 Ib-in. The maximum stress developed at section a-a 2 is 7327.47 psi.

1:Calculate the moment of Inertia. The moment of inertia of a circular section is calculated as I = π/4 (r2 - R2), where r is the inner radius and R is the outer radius. I = π/4(0.752 - 0.632) = 0.0138 in4

2: Calculate the section modulus. The section modulus can be calculated as Z = I / c, where c is the distance from the neutral axis to the outermost fiber.

Z = 0.0138 / 0.06 = 0.23 in3

3: Calculate the maximum bending stress. The maximum bending stress can be calculated as

σmax = M / Z,

where M is the applied bending moment.

σmax = 25 / 0.23 = 108.7 psi

4: Calculate the maximum stress using the formula

σ = ± σmax x (r / c)σ = ± 108.7 x (0.75 / 0.06) = ± 1363.63 psi

The maximum tensile stress occurs at the outer fiber, so we take the positive value.

σmax = 1363.63 psi

The maximum stress developed at section a-a 2 is 7327.47 psi.

You can learn more about radius at: brainly.com/question/13449316

#SPJ11

The maximum stress developed at section a-a is 4310 psi.

Given the following diagram as follows:The elbow of the pipe has an outer radius of 0.75 in. and an inner radius of 0.63 in. if the assembly is subjected to the moments of M 25 lb-in, determine the maximum stress developed at section a-a. We are required to determine the maximum stress developed at section a-a.Let us assume the thickness of the pipe is t. Then, the length of the section a-a can be written as;Length of section a-a = π/6 [d1 + d2 - √(d1d2)]Length of section a-a = π/6 [0.75 + 0.63 - √(0.75 × 0.63)]Length of section a-a = 0.57 in.The area moment of inertia of section a-a can be written as;I = π/64 [(d1⁴-d2⁴)]I = π/64 [(0.75⁴ - 0.63⁴)]I = 0.0058 in4Using the flexural formula;σ = Mc/Iσ = (25 × 1)/0.0058σ = 4310 psi.

To know more about inertia visit:

https://brainly.com/question/3268780

#SPJ11

The calculator program will be:

import java.util.HashMap;

import java.util.Map;

public class JavafxCalculator extends Application {

private static final String[][] template = { { "7", "8", "9", "/" }, { "4", "5", "6", "*" }, { "1", "2", "3", "-" },

  { "0", "c", "=", "+" } };

private final Map<String, Button> buttons = new HashMap<>();

private DoubleProperty stackValue = new SimpleDoubleProperty();

private DoubleProperty value = new SimpleDoubleProperty();

private enum Operation {

 NOOPERATION, ADDITION, SUBTRACTION, MULTIPLICATION, DIVISON

A computer program is the sequence or set of instructions in a programming language for a computer to execute.

It should be noted that computer programs are one component of software. In this case, the program is illustrated above.

Learn more about program on:

https://brainly.com/question/26642771

#SPJ1

Answer:

\(k=0.12\ln(r_2/r_1)\)\(\frac {W}{ m^{\circ} C}\)

where \(r_1\) and \(r_2\) be the inner radius, outer radius of the annalus.

Explanation:

Let \(r_1\), \(r_2\) and \(L\) be the inner radius, outer radius and length of the given annulus.

Temperatures at the inner surface, \(T_1=30^{\circ}C\\\) and at the outer surface, \(T_2=40^{\circ}C\).

Let q be the rate of heat transfer at the steady-state.

Given that, the heat flux at r=3cm=0.03m is

\(40 W/m^2\).

\(\Rightarrow \frac{q}{(2\pi\times0.03\times L)}=40\)

\(\Rightarrow q=2.4\pi L \;W\)

This heat transfer is same for any radial position in the annalus.

Here, heat transfer is taking placfenly in radial direction, so this is case of one dimentional conduction, hence Fourier's law of conduction is applicable.

Now, according to Fourier's law:

\(q=-kA\frac{dT}{dr}\;\cdots(i)\)

where,

K=Thermal conductivity of the material.

T= temperature at any radial distance r.

A=Area through which heat transfer is taking place.

Here, \(A=2\pi rL\;\cdots(ii)\)

Variation of temperature w.r.t the radius of the annalus is

\(\frac {T-T_1}{T_2-T_1}=\frac{\ln(r/r_1)}{\ln(r_2/r_1)}\)

\(\Rightarrow \frac{dT}{dr}=\frac{T_2-T_1}{\ln(r_2/r_1)}\times \frac{1}{r}\;\cdots(iii)\)

Putting the values from the equations (ii) and (iii) in the equation (i), we have

\(q=\frac{2\pi kL(T_1-T_2)}{\LN(R_2/2_1)}\)

\(\Rightarrow k= \frac{q\ln(r_2/r_1)}{2\pi L(T_2-T_1)}\)

\(\Rightarrow k=\frac{(2.4\pi L)\ln(r_2/r_1)}{2\pi L(10)}\) [as \(q=2.4\pi L\), and \(T_2-T_1=10 ^{\circ}C\)]

\(\Rightarrow k=0.12\ln(r_2/r_1)\)\(\frac {W}{ m^{\circ} C}\)

This is the required expression of k. By putting the value of inner and outer radii, the thermal conductivity of the material can be determined.

Answer:

Here are some characteristics that describe customers who are more likely to have low assets and medium-low debt:

* **Age:** Younger customers are more likely to have lower assets and debt than older customers. This is because they have had less time to accumulate assets and may be carrying more student loan debt.

* **Income:** Customers with lower incomes are more likely to have lower assets and debt than customers with higher incomes. This is because they have less money to save and invest, and may be spending more of their income on necessities.

* **Education:** Customers with less education are more likely to have lower assets and debt than customers with more education. This is because they may have lower-paying jobs and may be less likely to save and invest.

* **Marital status:** Single customers are more likely to have lower assets and debt than married customers. This is because they may have less income and may be spending more of their income on housing and other expenses.

* **Employment status:** Unemployed customers are more likely to have lower assets and debt than employed customers. This is because they may have less income and may be spending more of their income on necessities.

* **Credit score:** Customers with lower credit scores are more likely to have lower assets and debt than customers with higher credit scores. This is because they may have difficulty qualifying for loans and may be paying higher interest rates on debt.

It is important to note that these are just general trends, and there are always exceptions. There are many factors that can affect a customer's assets and debt, including their personal circumstances, financial decisions, and economic conditions.

Explanation:

Answer:

Aluminum

Explanation:

The best material to use when creating an electric fence would be Aluminum. Aluminum wiring is incredibly durable and can be easily obtained. Since aluminum is a non-magnetic metal its conducting capabilities far exceed other metallic options in the market and is also why companies choose aluminum for their high tension cable wiring. Aside from being more expensive than other feasible options its durability and conducting capabilities make it easily the best option.

Answer:

Steel Wires

Explanation:

International house of pancakes

To calculate the percentage conversion of n-hexane, the percentage excess air fed to the burner, and the dew point of the stack gas, more information is required. Specifically, the initial molar composition of n-hexane, the stoichiometric reaction equation, and the equilibrium relationship between water vapor pressure and temperature are needed.

Determining the percentage conversion of n-hexane involves comparing the molar amount of n-hexane in the product gas to the initial amount of n-hexane supplied.

The percentage excess air is calculated by comparing the actual amount of air fed to the burner to the stoichiometrically required amount of air for complete combustion. The dew point of the stack gas, assuming water is the only condensable species, depends on the equilibrium relationship between water vapor pressure and temperature.

To perform these calculations accurately, the initial molar composition of n-hexane, the stoichiometric reaction equation, and the equilibrium relationship between water vapor pressure and temperature need to be provided.

Learn more about excess here : brainly.com/question/30107804

#SPJ11

The term that describes how the Mac operating system handles files created, deleted, or modified since the last backup when the backup drive is temporarily missing is B) Snapshot.

A snapshot is a point-in-time copy of the contents of a volume. When Time Machine creates a backup of your Mac, it takes a snapshot of your files and folders at that moment. If the backup drive is temporarily missing, Time Machine will continue to take snapshots of your files and folders. When the backup drive is reconnected, Time Machine will copy over the differences between the latest snapshot and the previous backup to ensure that your backup is up to date. This allows you to restore your files to a point in time even if the backup drive was not available for a period.

Learn more about snapshot here-

https://brainly.com/question/30147632

#SPJ11

Answer: hope this helps u

Explanation:

Material,Flexibility,Comfort,Workplace Hazards

The following accurately describes how switches and hubs work

C. Switches use the hardware address in the frame to send it only to the port where the device is located.

B. A hub repeats frames to all ports, regardless of the destination address.

The option A is partially correct but not completely. A switch uses the logical addresses in a packet to send it through the correct port to a specific device, not to all VLANs defined on that port. Therefore, options C and B are the most accurate descriptions of how switches and hubs work, respectively.

Know more about switches and hubs here:

https://brainly.com/question/13260104

#SPJ11

It is important to keep welders properly tuned because it "Reduces air pollution" (Option A).

Welding machinery, welding guns, and welders are among the most important items for a welding expert to have. Welding machines provide heat that melts steel pieces, allowing them to be bonded.

Most welders also use an angle grinder to smooth out joints, wire brushes to clean or abrade steel surfaces before welding etc.

Learn more about welding:
https://brainly.com/question/4695733
#SPJ1

Full Question:

Why is it important to keep portable welders properly tuned?

a-Reduce air pollution

b-So they run quieter

c-To produce smoother welding current

d-All of the above