Teleconferencing can reduce the expense of bringing people from distant locations to the meeting. True / False

Answer:

A hammer and a wrench

Explanation:

The use of salt on snowy and icy roads could have a negative effect on Montgomery County's Water Supply. The salt used on the roads for melting ice can cause a number of issues for water supplies and ecosystems, and Montgomery County is no exception.

When salt is used to melt snow and ice on the road, it can dissolve into the water and run off into streams, rivers, and lakes. The salt lowers the freezing point of water and melts ice, but it also alters the chemical makeup of the water, making it more saline. It can also damage aquatic plants, animals, and fish that rely on freshwater systems.

Therefore, it is important to take steps to minimize the use of salt or to use alternatives, such as sand or beet juice, which are less harmful to the environment and water supplies.

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Answer:

d. all of the statements are correct.

Explanation:

WiMAX Broadband Wireless Access has the capacity to provide service up to 50 km for fixed stations. It has capacity of up to 15 km for mobile stations. WiMAX BWA describes both of 4G mobile WiMAX and fixed stations WiMAX. OFMD is used to increase spectral efficiency of WiMAX and to improve noise performance.

Answer:

B

Explanation:

Based on the maximum applied load, the factor of safety, and the distance between the loadbearing points, the minimum allowable bar diameter is 18.6 mm.

The diameter is included in the following formula:

Maximum stress / Factor of safety = (16 x Maximum applied load x distance between loadbearing points x 10⁻¹⁰) / (π x diameter³)

Solving gives:

(490 x 10⁶) / 2.25 = (16 x 5,000 x 55.0 x 10⁻¹⁰) / (π x diameter³)

217,777,777.78 = 0.00044 /  (π x diameter³)

diameter = 18.6 mm

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Product management works with system and solution architects to define and maintain nonfunctional requirements.

Designing, describing, and controlling solution engineering to align it with particular business challenges is the profession of solution architecture. For instance, a business-level issue is how to protect consumer data under the GDPR and other privacy requirements. Solution architecture outlines how those requirements would be implemented in a specific piece of software. The practice is led by a solution architect, who also introduces the solution's broad technical perspective. Although the business can be run internally, there are organizations that offer solution architecture consulting as a particular set of services. These phrases each have various components, which we'll go over in this post. See our video about the role of a solution architect if you want to rapidly learn all the specifics.

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Answer:

drugs

Explanation:

Answer:

  Technician B

Explanation:

In simplistic terms, the "hot wire" connects the load device to the source of electrical energy. The ground wire provides the return path for current from the load device to the energy source. In many circuits, the "ground wire" is at, near, or defined as "ground" potential (the actual potential of the Earth).

Technician A seems to be confused. Technician B is more correct.

Answer:idek

Explanation:u

Answer:

Texting while driving is dangerous and has cost too many lives. According to the National Highway Traffic Safety Administration, text messaging makes a crash twenty-three times more likely to happen. Additionally, studies have shown that teens who text and drive spend ten percent of their driving time outside their lane. Despite these risks, seventy-seven percent of people still believe that they can safely text while driving.

Explanation:

Answer:

Texting while driving is dangerous and has cost too many lives.

✔ For instance

, text messaging makes a crash twenty-three times more likely to happen.

✔ In addition

, teens who text and drive spend ten percent of their driving time outside their lane.

✔ Despite this

, seventy-seven percent of people still believe that they can safely text while driving.

Answer:

When two fair dice are rolled, 6×6=36 observations are obtained.

P(X=2)=P(1,1)=

36

1

​

P(X=3)=P(1,2)+P(2,1)=

36

2

​

=

18

1

​

P(X=4)=P(1,3)+P(2,2)+P(3,1)=

36

3

​

=

12

1

​

P(X=5)=P(1,4)+P(2,3)+P(3,2)+P(4,1)=

36

4

​

=

9

1

​

P(X=6)=P(1,5)+P(2,4)+P(3,3)+P(4,2)+P(5,1)=

36

5

​

P(X=7)=P(1,6)+P(2,5)+P(3,4)+P(4,3)+P(5,2)+P(6,1)=

36

6

​

=

6

1

​

P(X=8)=P(2,6)+P(3,5)+P(4,4)+P(5,3)+P(6,2)=

36

5

​

P(X=9)=P(3,6)+P(4,5)+P(5,4)+P(6,3)=

36

4

​

=

9

1

​

P(X=10)=P(4,6)+P(5,5)+P(6,4)=

36

3

​

=

12

1

​

P(X=11)=P(5,6)+P(6,5)=

36

2

​

=

18

1

​

P(X=12)=P(6,6)=

36

1

​

Therefore, the required probability distribution is as follows.

Then, E(X)=∑X

i

​

⋅P(X

i

​

)

=2×

36

1

​

+3×

18

1

​

+4×

12

1

​

+5×

9

1

​

+6×

36

5

​

+7×

6

1

​

+8×

36

5

​

+9×

9

1

​

+10×

12

1

​

+11×

18

1

​

+12×

36

1

​

=

18

1

​

+

6

1

​

+

3

1

​

+

9

5

​

+

6

5

​

+

6

7

​

+

9

10

​

+1+

6

5

​

+

18

11

​

+

3

1

​

=7

E(X

2

)=∑X

i

2

​

⋅P(X

i

​

)

=4×

36

1

​

+9×

18

1

​

+16×

12

1

​

+25×

9

1

​

+36×

36

5

​

+49×

6

1

​

+64×

36

5

​

+81×

9

1

​

+100×

12

1

​

+121×

18

1

​

+144×

36

1

​

=

9

1

​

+

2

1

​

+

3

4

​

+

9

25

​

+5+

6

49

​

+

9

80

​

+9+

3

25

​

+

18

121

​

+4

=

18

987

​

=

6

329

​

=54.833

Then, Var(X)=E(X

2

)−[E(X)]

2

=54.833−(7)

2

=54.833−49

=5.833

∴ Standard deviation =

Var(X)

​

=

5.833

​

=2.415

The refrigerator uses 8 x 120 x 4 = 3840 watt-hours of electrical energy in 8 hours.

Electrical power is the rate at which electrical energy is transferred or consumed. It is usually measured in watts (W) or kilowatts (kW). Electrical power is the product of voltage and current. Power (P) = Voltage (V) x Current (I).

Calculate the current flowing through the refrigerator:

I = V/R = 120V/120Ω = 4A

Calculate the watt hours of electrical energy used:

Wh = P x t = V x I x t = 120V x 4A x 8h = 3840Wh

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The large modulus of elasticity and the magnitude of the thickness of the

cylinder allows it to support the heavy load with minimal deformation.

Reasons:

Length of the cylinder, L = 2 m

Outside diameter of the cylinder, \(D_o\) = 50 mm

Internal diameter of the cylinder, \(D_i\) = 20 mm

Load applied to the cylinder, P = 25 kN = 25,000 N

Modulus of elasticity of the material, E = 100 GPa

First part; To find the stress in in the cylinder, σ

Solution:

\(\displaystyle Tensile \ stress, \ \sigma = \mathbf{\frac{Load \ applied}{Cross\ sectional \ area}} = \frac{P}{A}\)

The cross sectional area of the cylinder, A = \(\displaystyle \mathbf{\frac{\pi}{4} \cdot \left(D_o^2 - D_i^2 \right)}\)

Therefore;

\(A = \displaystyle \frac{\pi}{4} \cdot \left(\left(50 \, mm \right)^2 - \left(20 \, mm\right)^2 \right) \approx \mathbf{ 1,649.336 \, mm^2}\)

\(\displaystyle Tensile \ stress, \ \sigma = \frac{25,000 \, N}{1,649.336 \, mm^2} \approx 15.158 \, N/mm^2 = \mathbf{ 15.158 \, MPa}\)

Second part;

The deformation of the cylinder is found as follows;

\(\displaystyle Modulus \ of \ Elasticity, \, E = \mathbf{\frac{Tensile \ stress}{Tensile \ strain}} = \frac{\sigma}{\epsilon}\)

\(\displaystyle \epsilon = \mathbf{\frac{\delta L}{L}}\)

Therefore;

\(\displaystyle E = \frac{\sigma}{\frac{\delta L}{L} }\)

\(\displaystyle \frac{\delta L}{L} = \frac{\sigma}{E}\)

Which gives;

\(\displaystyle \delta L = \mathbf{\frac{\sigma}{E} \times L}\)

Where;

δL = The deformation of the cylinder

\(\displaystyle \delta L = \frac{15.158 \, N/mm^2}{100 \, GPa} \times 2,000 \, mm = \frac{15.158 \, MPa}{100 \times 10^3 \, MPa} \times 2,000 \, mm \approx \mathbf{0.303 \, mm}\)

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The received power if the effective aperture area of the receiving antenna is 20 m2 is 177.77 m2.

In physics, power is referred to as the rate of energy conversion or transfer over time. The unit of power in the SI system, often known as the International System of Units, is the Watt (W). A single joule per second is one watt.

Power was formerly referred to as activity in some research. A scalar quantity is power. As power is always a function of labor done, it follows that if a person's output varies during the day depending on the time of day, so will his power.

A measure of the pace at which energy is transferred, power is a physical quantity. As a result, it can be described as the pace of job completion relative to time.

Therefore, The received power if the effective aperture area of the receiving antenna is 20 m2 is 177.77 m2.

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As a supervised learning algorithm for problem classification, the Decision Tree algorithm is one of the most widely utilized in machine learning today.

Whether a problem is logical, mathematical, or complex in nature, algorithms can be created to solve it. As an illustration, consider sorting algorithms, depth-first search, and traveling salespeople. The algorithm, however, would arrive at a finite solution after a certain number of steps before coming to an end. Algorithms can be used to describe typical daily tasks. An algorithm for preparing a specific cuisine, for instance, might be thought of as a recipe.

Steps 1-3 outline the algorithm. The amounts of each component that are mentioned, together with the type of pan and desired topping, are our inputs. A series of procedures known as an algorithm are used to solve issues or carry out tasks. A typical illustration of an algorithm is a recipe, which is a set of detailed directions for making a dish or meal.

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Answer:a

Ieieksdjd snsnsnsnsksks

Answer:
The most common reason a cruise control stops working is due to a blown fuse or a defective brake pedal switch. It can also be caused by issues with the throttle control system or the ABS. In older cruise control systems it can be caused by a broken vacuum line.

Answer:

A

Explanation:

Answer:

A

Explanation:

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great,the wire heats up until it melts and breaks the circuit

Answer:

1819.4 ft

Explanation:

Let us assume  the coefficient of side friction is 0.10

The radius of curve is given by the formula:

\(R=\frac{V^2}{g(f_s+\frac{e}{100} )}\)

Where R is the minimum radius of a horizontal curve, V is the speed, f is coefficient of side friction and e/100 = super elevation rate, g =acceleration due to gravity

Given that:

V = 70 mph = (70 * 1.467) ft/s = 102.69 ft/s, g =32.2 ft/s², e/100 = 0.08, f= 0.1

\(R=\frac{V^2}{g(f_s+\frac{e}{100} )}=\frac{102.69^2}{32.2(0.1+0.08)}=1819.4\ ft\)

the minimum radius of a horizontal curve is 1819.4 ft

Answer:

a) The Coefficient of Performance of this air conditioner is 2.288.

b) The rate of heat transfer to the outside air is 16.767 kilowatts (1006.02 kilojoules per minute).

Explanation:

a) Air conditioners are applications of refrigeration cycles, whose performance is analyzed by means of the Coefficient of Performance (\(COP_{R}\)), dimensionless:

\(COP_{R} = \frac{\dot Q_{L}}{\dot W}\) (Eq. 1)

Where:

\(\dot Q_{L}\) - Heat removal rate from the house, measured in kilowatts.

\(\dot W\)- Electric power, measured in kilowatts.

If we know that \(\dot W = 5.10\,kW\) and \(\dot Q_{L} = 11.667\,kW\), the Coefficient of Performance of this air conditioner is:

\(COP_{R} = \frac{11.667\,kW}{5.10\,kW}\)

\(COP_{R} = 2.288\)

The Coefficient of Performance of this air conditioner is 2.288.

b) We find the rate of heat transfer to the outside air (\(\dot Q_{H}\)), measured in kilowatts, by applying the First Law of Thermodynamics:

\(\dot Q_{H} = \dot Q_{L}+\dot W\) (Eq. 2)

If we get that \(\dot W = 5.10\,kW\) and \(\dot Q_{L} = 11.667\,kW\), then the rate of heat transfer to the outside air is:

\(\dot Q_{H} = 11.667\,kW+5.10\,kW\)

\(\dot Q_{H} = 16.767\,kW\)

The rate of heat transfer to the outside air is 16.767 kilowatts (1006.02 kilojoules per minute).

The output of the DAC when the input is (11000011)2 is 6.1451V.

a. Circuit diagram of an 8-bit Digital to Analog Converter (DAC): The circuit diagram of an 8-bit Digital to Analog Converter (DAC) is as follows:

b. Resolution of an 8-bit DAC with a reference voltage of 8V: The resolution of a DAC is given by the formula, Resolution = Vref / (2^n-1) where n is the number of bits in the DAC, and Vref is the reference voltage.

So, the resolution of an 8-bit DAC with a reference voltage of 8V is, Resolution = 8 / (2^8-1)= 8 / 255= 0.0314 V (rounded to 4 decimal places)

c. Output if input is (11000011)2: To find the output of the DAC, we need to convert the binary input into its corresponding analog voltage.

The input given is (11000011)2, which is an 8-bit binary number. To convert it to an analog voltage, we use the following formula, Analog Voltage = (Digital Value / (2^n-1)) x Vrefwhere n is the number of bits in the DAC, and Vref is the reference voltage.

Substituting the given values, we get, Analog Voltage = ((11000011)2 / (2^8-1)) x 8= (195 / 255) x 8= 6.1451 V (rounded to 4 decimal places)

Therefore, the output of the DAC when the input is (11000011)2 is 6.1451V.

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The SAFe Lean-Agile principles form the foundation of the framework and guide organizations in adopting an agile mindset.

SAFe (Scaled Agile Framework) is a methodology for scaling agile practices to larger organizations. The SAFe Lean-Agile principles form the foundation of the framework and guide organizations in adopting an agile mindset. The nine SAFe Lean-Agile principles are:

1)Take an economic view: Understand and optimize the flow of value through the organization to drive economic outcomes.

2)Apply systems thinking: Consider the organization as a complex system of interdependent parts and optimize the whole, not just the individual components.

3)Assume variability and preserve options: Embrace uncertainty and variability by creating options for decision-making as late as possible.

4)Build incrementally with fast, integrated learning cycles: Build solutions incrementally through fast feedback loops to ensure that they meet the customer's needs.

5)Base milestones on objective evaluation of working systems: Define milestones based on working systems, not on intermediate artifacts or milestones.

6)Visualize and limit WIP (work in progress), reduce batch sizes, and manage queue lengths: Limit the amount of work in progress to reduce lead time and increase efficiency.

7)Apply cadence, synchronize with cross-domain planning: Establish a regular, predictable cadence for all work and align planning across domains to enable cross-functional collaboration.

8)Unlock the intrinsic motivation of knowledge workers: Foster a culture that supports autonomy, mastery, and purpose to motivate and engage knowledge workers.

9)Decentralize decision-making: Empower those closest to the work to make decisions and enable decentralized decision-making across the organization.

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Use the t-test to compare the estimated expected frequencies with the actual frequencies.

(Row Total * Column Total)/N is the formula for expected frequency.

Each table cell's top value represents the observed frequency, and its bottom number represents the predicted frequency.

By dividing each sample's total by the combined total of both samples, a constant multiplier for each sample is obtained in order to determine the expected results. For sample A in table 8.1, this is 155/289 = 0.5363. Then, this fraction is multiplied by 22, 46, 73, 91, and 57 in that order.

Chi-square goodness-of-fit test for the statistical model. Significant Assumption Each category's expected value must be more than or equal to 5. Ei=npi=(400)(.20)=805 for each category in this case, indicating that the model is adequate.

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Explanation:

rational

Step-by-step explanation:

The discriminant (d) of a quadratic equation ax^2 + bx + c = 0ax

2

+bx+c=0 is:

\boxed{\mathrm{d =} \ b^2 - 4ac}

d= b

2

−4ac

.

If:

• d > 0, then there are two real solutions

• d = 0, then there is a repeated real solution

• d < 0, then there is no real solution.

In this question, we are given the quadratic equation 3x^2 + 4x - 2 = 03x

2

+4x−2=0 . Therefore, the discriminant of the equation is:

b² - 4ac = (4)² - 4(3)(-2)

= 16 - (-24)rational

Step-by-step explanation:

The discriminant (d) of a quadratic equation ax^2 + bx + c = 0ax

2

+bx+c=0 is:

\boxed{\mathrm{d =} \ b^2 - 4ac}

d= b

2

−4ac

.

If:

• d > 0, then there are two real solutions

• d = 0, then there is a repeated real solution

• d < 0, then there is no real solution.

In this question, we are given the quadratic equation 3x^2 + 4x - 2 = 03x

2

+4x−2=0 . Therefore, the discriminant of the equation is:

b² - 4ac = (4)² - 4(3)(-2)

= 16 - (-24)

= 40

Since the discriminant, 40, is greater than zero, the quadratic equation has 2 rational solutions.

= 40

Since the discriminant, 40, is greater than zero, the quadratic equation has 2 rational solutions.

A system of linear equations consists of two or more linear equations that share variables and have to be resolved simultaneously. The Gauss-Jordan method is a mathematical technique for solving systems of linear equations. This technique involves performing elementary operations on the augmented matrix, which is the matrix representing the system of equations, to reduce it to an equivalent matrix with a row-reduced form.

Let's use the following variables:

T = number of touchdowns

E = number of extra-point kicks

F = number of field goals

According to the problem, we know that:

T + E = 5FT = 6F

Since the total number of points scored is 35 and there are three ways to score points, we can also write:

T * 6 + E * 1 + F * 3 = 35

Now we can put these three equations into an augmented matrix and use the Gauss-Jordan method to solve it:

\(\left[\begin{array}{ccccc}1&1&-5&0&0\\2&0&1&-6&0\\13&1&0&0&35\end{array}\right]\)

First, we subtract twice the first row from the second row to eliminate the 2 in the first column of the second row:

\(\left[\begin{array}{ccccc}1&1&-5&0&0\\2&0&1&-6&0\\1&-1&1&0&25\end{array}\right]\)

Then we add row 2 to row 1 to eliminate the -1 in the first column of the third row:

\(\left[\begin{array}{ccccc}1&0&-4&-6&0\\2&0&1&-6&0\\1&0&-1&1&-3\end{array}\right]\)

Finally, we add four times the third row to the first row to eliminate the -4 in the first column of the first row:

\(\left[\begin{array}{ccccc}1&0&0&-10&8\\2&0&1&-6&0\\1&0&-1&1&-3\end{array}\right]\)

The solution to the system of equations is:

T = 8E = -3F = 2Therefore, 8 touchdowns, 8 extra-point kicks, and 2 field goals were scored.

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Answer:

Explanation:

heat

Answer:

1) The bending moment diagram of the shaft is shown in Figure 1. The weakest cross section A is located at the point where the bending moment is maximum.

2) The weakest point on cross section A is located at the point where the bending moment is maximum.

3) The von-Mises stress at the weakest point is given by:

σ = M/I

where M is the bending moment and I is the moment of inertia of the cross section.

4) The factor of safety n is given by:

n = Sy/σ

where Sy is the yield strength of the shaft and σ is the von-Mises stress at the weakest point.

Explanation:

Hope this helps!

The calculated value is 9.5 g/cm³. For the density calculation, we need to know the mass and the volume of the unit cell.

When = = = 90 and a = b = c, we have a cubic lattice; however, if c is greater than a and b (a= b), we have a tetragonal lattice. This lattice is identical to the simplest one, the cubic lattice, which can be simple or primitive cubic or body centered. Likewise, the tetragonal lattice can be primitive or body centered. When they inform us that there are atoms at all four corners and one in the center of the unit cell, we know it's a body-centered lattice.

= 123 g / mol x 1 mol / 6.022 x 10²³  x 2 atoms/unit cell

= 4.1 g x 10⁻²² g/unit cell

Finally, the density is calculated.

d = m/V

= 4.1  x 10⁻²² g /4.3 x 10⁻²³ cm³

= 9.5 g/cm³

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