The pipe carrying feed water to a boiler in a thermal power plant has been found to vibrate violently at a pump speed of 800 rpm. in order to reduce the vibrations, an absorber consisting of a spring of stiffness k, and a trial m, mass of 1 kg is attached to the pipe. this arrangement is found to give the natural frequency of the system as 750 rpm. it is desired to keep the natural frequencies of the system outside the operating speed range of the pump, which is 700 rpm to 1040 rpm. determine the new values ka, and ma, that satisfy this requirement.​

The factor of Safety by Maximum Distortion Energy Theory is given as: N = 6.04

According to this idea, failure by yielding happens when the distortion energy per unit volume in a condition of combined stress equals that associated with yielding in a basic tension test at any location in the body.

Note that we are given the following:

A solid Steel bar subjected to a bending force of F = 55kN

Torsional load T = 30 kN-mm; and

Yield Strength (sy) = 280Mpa

Sut = 330 Mpa

The formula for Normal Stress is given as:

\(\alpha _{x}\) = [UP/πd²] + [ (32* f * L)/πd³]

= [(4 * 8 * 10³)/π * (0.02)²] + [(32 * 55 *10³ * 0.1)/ π * (0.02)³]

= 25.46 + 7.003

\(\alpha _{x}\)= 32.5 Mpa

Tyz = (16T)/πd³

= (16 * 30)/ π * (0.02)³

= 19.098

Tyz = 19.098

Following from the above, sate of stress, we have:

α₁ = αₓ = 32.46 Mpa; and

α₂ = Tyz = 19.098 Mpa;

α₃ = -Tyz = -p19.098 Mpa;

Utilizing the formula given by the Maximum Distortion Energy Theory:

α₁² + α₂² + α₃² - (α₁α₂ + α₂α₃ + α₃α₁)

= Sy²/N²

→ 32.46² + 19.098² + 19.098² - ( 32.46* 19.098 - 19.098² -32.46 *  19.098)

= 280/N²

N = 6.04

Learn more about Maximum Distortion Energy Theory at:
https://brainly.com/question/22435706
#SPJ1

The foundation of threat hunting is the premise that threat actors have already infiltrated our network. Threat hunting is a proactive approach to cybersecurity that involves actively searching for and identifying potential threats or security incidents that may have gone undetected by traditional security measures.

This approach recognizes that the traditional "defense in depth" approach is not always sufficient to protect against increasingly sophisticated and targeted attacks.

While the other options listed - cybercrime will only increase, attacks are becoming more difficult, and pivoting is more difficult to detect than ever before - are certain factors that contribute to the need for threat hunting, they are not the primary premise upon which it is based. Rather, the foundation of threat hunting is the recognition that attackers are already inside the network and may be hiding in plain sight and that proactive measures are necessary to identify and remediate these threats before they can cause damage. By actively searching for threats and anomalies within the network, organizations can take a more proactive and effective approach to cybersecurity.

Learn more about foundation here:

https://brainly.com/question/29222314

#SPJ11

Answer:

234567891234567891234567891 what is this?????

Explanation:

234567891234567891234567891

IS THIS IS A QUESTION

OH DON'T MIND JUST ASKING

BTW

GOOD MORNING/AFTERNOON/EVENING/NIGHT

HOW ARE YOU

HAVE A GREAT DAY AHEAD

PLS MARK ME AS BRAINLIEST

The other three options - creating tables and columns from entities and attributes, selecting primary keys, and representing relationships - are all important steps in the process. D) Create constraints and triggers is not a step in the database design process.

Constraints and triggers are typically added after the initial design to enforce rules and ensure data integrity.
Based on the given options:

A) Create tables and columns from entities and attributes
B) Select primary keys
C) Represent relationships
D) Create constraints and triggers

All these steps (A, B, C, and D) are essential components in the database design process.

To learn more about database visit;

https://brainly.com/question/30634903

#SPJ11

Answer:

E = 8.83 kips

Explanation:

First, we determine the stress on the rod:

\(\sigma = \frac{F}{A}\\\\\)

where,

σ = stress = ?

F = Force Applied = 1300 lb

A = Cross-sectional Area of rod = 0.5\(\pi \frac{d^2}{4} = \pi \frac{(0.5\ in)^2}{4} = 0.1963\ in^2\)

Therefore,

\(\sigma = \frac{1300\ lb}{0.1963\ in^2} \\\\\sigma = 6.62\ kips\)

Now, we determine the strain:

\(strain = \epsilon = \frac{elongation}{original\ length} \\\\\epsilon = \frac{0.009\ in}{12\ in}\\\\\epsilon = 7.5\ x\ 10^{-4}\)

Now, the modulus of elasticity (E) is given as:

\(E = \frac{\sigma}{\epsilon}\\\\E = \frac{6.62\ kips}{7.5\ x\ 10^{-4}}\)

E = 8.83 kips

Answer:

Both helpful and harmful

Explanation:

The milkweed plant is helpful, because it is the host pant for monarch butterflies and helps provide nectar and pollen for many other pollinators.

It is harmful for many reasons, including it's toxic, poisonous, it produces a type of steroid that is able to stop the heart, and they cause many other sicknesses.

Based on the two things above, milkweed plants are both helpful and harmful to the environment.

It is helpful because the milkweed plants acts as source of food for the caterpillar while it is harmful because it kills other plants around it.

This plant is known to belong to the genus  of herbaceous plant. It is called Asclepias as it is a perennial, flowering plants.

It is said to derive its name from latex, that is a milky substance that comes out of it when cells are damaged. monarch caterpillars needs to eat milkweed so that they can survive.

Learn more about milkweed plants  from

https://brainly.com/question/26193241

We can see here that the maximum value of rolling resistance over which a loaded scraper can maintain is: 780 lb/ton

Rolling resistance is the force that resists the motion of a rolling object on a surface. Maximum rolling resistance refers to the highest level of resistance that an object can encounter while rolling on a particular surface.

For a fully loaded condition:

The total resistance = (gross + rolling) resistance

52% = 0% - rolling resistance

rolling resistance = 52%

The maximum rolling resistance = rolling resistance percentage × speed

The maximum rolling resistance = 52% (15 lb/ton)/(1% resistance)

The maximum rolling resistance = 780 lb/ton

Learn more about maximum rolling resistance on https://brainly.com/question/27021939

#SPJ1

When the normally open reset input is closed, the sequencer instruction resets to the first output pattern.

In a sequencer or programmable logic controller (PLC), the reset input is a control signal that, when activated by closing a normally open switch or contact, causes the sequencer to return to its initial state. This reset action clears any previous outputs and sets the sequencer to start executing from the beginning, typically the first output pattern. It allows for the reinitialization of the sequencer's operation, ensuring consistent and predictable behavior. By opening and closing the reset input, the sequencer can be reset and restarted as needed during the control process.

Know more about programmable logic controller here:

https://brainly.com/question/30828800

#SPJ11

Answer:

a bowl, plate,

Explanation:

The strengthening mechanisms for metals include Solid Solution Strengthening, Hot Working, Precipitation Hardening, Grain Size Reduction, and Cold Working. These processes help improve the mechanical properties of metals, making them stronger and more resistant to deformation.

.The Strengthening Mechanisms for Metals include Solid Solution Strengthening, Precipitation Hardening, Grain Size Reduction, and Cold Working. Solid Solution Strengthening occurs when small atoms are added to the metal matrix to distort the crystal lattice and increase its strength. Precipitation Hardening is a process where a metal alloy is heated and then quenched, causing small particles to form within the metal and harden it. Grain Size Reduction is achieved by reducing the size of the grains in the metal, which leads to an increase in strength. Cold Working involves deforming the metal at room temperature, which increases its strength but also makes it more brittle. Recrystallization is a process where the metal is annealed and then cooled, which causes new grains to form and increases its strength. Hot Working involves heating the metal and then deforming it, which also increases its strength. Annealing is a heat treatment process where the metal is heated and then cooled slowly, which reduces its hardness and increases its ductility. Grain Size Growth occurs when the metal is heated and the grains grow larger, which decreases its strength.

Learn More about strengthening here :-

https://brainly.com/question/13112434

#SPJ11

Health and safety standards in the wood processing industry are crucial for the safety and protection of workers in the industry. They must follow strict procedures to ensure that they are not exposed to harmful elements, and that their health and well-being are not compromised.

Following are the two points related to the importance of Health and Safety Standards in the wood processing industry.

In conclusion, health and safety standards in the wood processing industry are essential for the protection of workers and the success of companies in the industry. By prioritizing employee safety and compliance with regulations, employers can minimize the risks associated with wood processing and maintain a safe and healthy work environment.

To learn more about wood processing, visit:

https://brainly.com/question/17233203

#SPJ11

The entropy changes in the system when there are constant specific heats and variable specific heats are found out to be

a) ASsys= 2.20 kJ/K

b) ASsys= 1.56 kJ/K respectively.

(a) Constant Specific Heat

To solve the problem, use the following formula:

ASsys = Cv ln(T₂/T₁)+R ln(V₂/V₁)

ASsys = [Cv ln(T₂/T₁)] + [R ln(V₂/V₁)]

where: ASsys= system entropy change

R = 0.287 kJ/kg.K

Cv = 0.717 kJ/kg.K

T₁ = 17 + 273 = 290 K (initial temperature)

P₁ = 120 kPa (constant pressure)

P₂ = 120 kPa (constant pressure)

V₁ = 300 L

= 0.3 m³ (initial volume)

V₂ = V₁ [since V is constant]

= 0.3 m³

T₂ = T₁ + q/Cp

where q= amount of heat added

Cp= specific heat of air at constant pressure

From the given data,

Q= P x V

= 120 kPa x 0.3 m³

= 36 kJ

Q/Δt = 200 W

= 200 J/s

Cp= 1.005 kJ/kg.K

[Table A-2, at 17°C, for air]

T₂ = (q/Cp) Δt + T₁

= (200/1.005) x 900 + 290

= 692 K

Now apply the formula for system entropy change.

ASsys = Cv ln(T₂/T₁)+R ln(V₂/V₁)

= 0.717 x ln(692/290) + 0.287 x ln(0.3/0.3)

= 2.20 kJ/K

(b) Variable Specific Heat

To solve the problem, use the following formula:

ASsys = ∫(Cp/T)dT- R ln(V₂/V₁)

whereASsys= system entropy change

ΔT= T₂ - T₁

= (692-290)

= 402 K

R= 0.287 kJ/kg.K

V₁ = V₂

= 0.3 m³

Using the data from Table A-2, Cps and T can be tabulated as:

Cp (kJ/kg.K)T (K)1.0052731.005284.16 (Note: T₂)1.005692

Apply the trapezoidal rule for the integral to get:

ASsys = ∫(Cp/T)dT- R ln(V₂/V₁)

= 0.287[(1.005273/290) + (1.005284.16/273) + (1.005692/692)]- 0.287 ln(0.3/0.3)

= 1.56 kJ/K

To know more about specific heat, visit:

https://brainly.com/question/28302909

#SPJ11

The factors that  you need to consider when preparing to move gondolas are:

In choosing gondola one need to look at some  factor in decisions such as height.

Know that it is good to  consider the construction material and also the center wall configuration for its building also.

The factors that  you need to consider when preparing to move gondolas are:

Learn more about gondola from

https://brainly.com/question/10652274

#SPJ1

Answer:

The voltages of all nodes are, IE = 4.65 mA, IB =46.039μA,  IC=4.6039 mA, VB = 10v, VE =10.7, Vc =4.6039 v

Explanation:

Solution

Given that:

V+ = 20v

Re = 2kΩ

Rc = 1kΩ

Now we will amke use of the method KVL in the loop.

= - Ve + IE . Re + VEB + VB = 0

Thus

IE = V+ -VEB -VB/Re

Which gives us the following:

IE = 20-0.7 - 10/2k

= 9.3/2k

so, IE = 4.65 mA

IB = IE/β +1 = 4.65 m /101

Thus,

IB = 0.046039 mA

IB = 46.039μA

IC =βIB

Now,

IC = 100 * 0.046039

IC is 4.6039 mA

Now,

VB = 10v

VE = VB + VEB

= 10 +0.7 = 10.7 v

So,

Vc =Ic . Rc = 4.6039 * 1k

=4.6039 v

Finally, this is the table summary from calculations carried out.

Summary Table

Parameters          IE       IC           IB            VE       VB         Vc

Unit                     mA     mA          μA            V           V          V

Value                  4.65    4.6039   46.039    10.7      10     4.6039

Answer:

  5 rpm

Explanation:

Each turn of the driver gear moves 10 teeth past the point of engagement with the driven gear. That is half of the 20 teeth on the driven gear, so it makes 1/2 turn for each turn of the driver.

In 1 minute, the driver makes 10 turns, so the driven gear makes 5 turns. Its speed is 5 rpm.

Answer:

  0°

Explanation:

The resistor voltage has the same phase as the circuit current. There is no phase difference.

Answer:

Explanation:

Answer:

Shallow foundations, often called footings, are usually embedded about a metre or so into soil. ... Another common type of shallow foundation is the slab-on-grade foundation where the weight of the structure is transferred to the soil through a concrete slab placed at the surface.

Explanation:

Because I said so.

PJM Interconnection, the electricity grid operator for 65 million people in 13 states and the District of Columbia, has requested the public in its region to conserve electricity.

To learn more about spreadsheet refer to:

https://brainly.com/question/26919847

#SPJ4

Answer:

The advantages of using a pure sine wave for your appliances and machinery are as follows: Reduces electrical noise in your machinery.

translates to no TV lines and no sound system hum.

Cooking in microwaves is quicker.

Explanation:

The smoothest signal is a sine wave, and sine waves are the basis of all functions.

Every other continuous periodic function is a basis function, which means that it can be described in terms of sines and cosines.

For instance, using the Fourier series, I can describe the fundamental Sinusoidal frequency and its multiples in terms of the triangle and square waves.

The displacement of end D with respect to end A is \(-0.488 \times 10^{-3}\;m\)

Given the following data:

To determine the displacement of end D with respect to end A:

First of all, we would do a sectional cut of the circular rods at point A and then determine the sum of forces acting on it:

\(\sum F=0\\\\ 10000+N_1=0\\\\N_1 = -10000\;N\)

Mathematically, the displacement of a circular rod is given by this formula:

\(d = \frac{NL}{AE}\)

Where:

Substituting the given parameters into the formula, we have;

\(d_1 = \frac{-10000 \times 0.435}{\frac{3.142 \times 0.02^2}{4} \times 68.9 \times 10^9} \\\\d_1 = \frac{-4350}{0.0003142 \times 68.9 \times 10^9}\\\\d_1 =-0.201 \times 10^{-3}\;meter\)

For section cut BC:

\(\sum F=0\\\\ 10000-20000+N_2=0\\\\N_2 = 10000\;N\)

\(radius = outer\;radius^2 - inner\;radius^2\\\\radius = 0.04^2 -0.03^2=0.0007\;m\)

\(d_2 = \frac{10000 \times 0.435}{\frac{3.142 \times 0.0007^2}{4} \times 68.9 \times 10^9} \\\\d_2 = \frac{4350}{0.00054985 \times 68.9 \times 10^9}\\\\d_2 =0.115 \times 10^{-3}\;meter\)

For section cut D:

\(\sum F=0\\\\ -20000-N_3=0\\\\N_3 =- 20000\;N\)

\(d_3 = \frac{-20000 \times 0.435}{\frac{3.142 \times 0.02^2}{4} \times 68.9 \times 10^9} \\\\d_3 = \frac{-8700}{0.0003142 \times 68.9 \times 10^9}\\\\d_3 =-0.402 \times 10^{-3}\;meter\)

For the total displacement:

The total displacement is equal to the displacement of end D with respect to end A.

\(d_T = d_1 +d_2+d_3\\\\d_T = -0.201 \times 10^{-3} + 0.115 \times 10^{-3}-0.402 \times 10^{-3}\\\\d_T = -0.488 \times 10^{-3}\;m\)

Read more on displacement here: https://brainly.com/question/25690629

To check if a power supply is faulty, a technician can use a multimeter to measure the voltage output from the power supply. If the voltage is lower than the specified output voltage, it may indicate a faulty power supply. Another way to check is by using a power supply tester, which can determine if the power supply is providing power to all the necessary components.

If either of these tests indicates a faulty power supply, it should be replaced. It's important to note that power supply issues can also be caused by other factors, such as a short circuit in a component or a faulty motherboard.

Therefore, it's important to conduct further troubleshooting if needed to identify the root cause of the problem.

To know more about multimeter: https://brainly.com/question/5135212

#SPJ11

Explanation:

There are 8.35 pounds in a gallon of water. Water weighs 1 gram per cubic centimeter or 1 000 kilogram per cubic meter, i.e. density of water is equal to 1 000 kg/m³; at 25°C (77°F or 298.15K) at standard atmospheric pressure.

Answer:

Full wave rectification flips the negative half cycle of the sine wave to positive so the result is two positive half cycles.

Explanation:

hope it helps a lil

The family should accept a minimum of Kshs.42,250,000.00 to avoid incurring a loss.

To obtain the total cost, the expenses for the land, trees and upkeep are summed up and subsequently reduced by 6. 5% using a discount rate.

Hence, it can be seen that a forced acquisition appraisal primarily focuses on three key factors: the land's market value, the expenses involved in replacing the property, and the potential harm caused to the owner's belongings.

Read more about yield rate here:

https://brainly.com/question/457082

#SPJ1

Answer:

shear strength = 2682.31 Ib/ft^2

Explanation:

major principal stress = 100 Ib / in2

minor principal stress = 20 Ib/in2

Normal stress = 3000 Ib/ft2

Determine the shear strength when direct shear test is performed

To resolve this we will apply the coulomb failure criteria relationship between major and minor principal stress a

for direct shear test

use Mohr Coulomb criteria relation between normal stress and shear stress

Shear strength when normal strength is 3000 Ib/ft  = 2682.31 Ib/ft^2

attached below is the detailed solution

False, competence refers to speakers' tacit, unconscious knowledge of grammar.

Competence refers to speakers' underlying knowledge and ability to use a language, which includes both conscious and unconscious knowledge of grammar.

Even if the speaker is unable to explicitly state the rules, it includes their innate sense of what is or is not grammatically correct.

This ingrained understanding is frequently referred to as "linguistic competence," which is separate from "performance," which refers to the actual use of language in settings that might be influenced by things including memory impairment, speech impediments, and situational considerations.

Learn more about competence at: https://brainly.com/question/30689973

#SPJ4

14.14 V is the RMS value of the largest sine-wave input for which an undistorted output is possible. 100 mW is the corresponding output power available.

Voltage gain with load: Using the equation

\(A_{v} = A_{voc} \times \frac{R_l}{(R_i + R_l)}\)

where

\(A_{voc}\) is the open-circuit voltage gain,

Ri is the input resistance, and

Rl is the load resistance, one may determine the voltage gain when a load of 500 ohms is connected.

The formula for calculating the maximum undistorted rms input voltage is: Calculating the highest undistorted output power is as follows:

Imax = 20 mA

        = 20 × 10⁻³ A

In this case,

\(A_{voc} = 10^{\frac{40}{20}}\)

        = 100, Ri

        = 1 M Ohm,

and Rl = 500 Ohms,

so,

\(A_{v} = 100 \times \frac{500}{(1 + 500)}\)

    = 100 × (500/1.5)

    = 33.33

The voltage gain in dB can be calculated as

20 × log(Av)

= 20 × log (33.33)

= 32.2 dB.

Ap = (33.33)² / 500

    = 11.1

The power gain in dB can be calculated as

10 × log(Ap)

= 10 × log(11.1)

= 9.54 dB.

Vmax = Imax × Ri

         = 20 × 10⁻³ × 1 × 10⁶

         = 20 V

\(V_{rms} = \frac{V_{max}}{\sqrt{2}}\)

        \(= \frac{20}{\sqrt 2}\)

        = 14.14 V

Pmax = (Vrms)² / Rl

         = (14.14)² / 500

         = 0.1 W

         = 100 mW

Learn more about power Visit: brainly.com/question/1634438

#SPJ4

Answer: B.Idle relearn

Explanation:

When replacing an intake manifold gasket due to a vacuum leak, using a scan tool for idle relearn is a crucial step to complete the job. The Option B.

The scan tool is used to reset the idle control system and allow the engine's computer to relearn the correct idle speed and air/fuel mixture. This is important because the replacement of the intake manifold gasket can affect the engine's idle characteristics.

By using the scan tool to perform an idle relearn procedure, the engine management system can recalibrate and optimize the idle control parameters, ensuring smooth and stable idle operation. This step helps to restore the engine's performance and maintain proper combustion efficiency after the intake manifold gasket replacement.

Read more about scan tool

brainly.com/question/31196218

#SPJ2

Explanation:

the resultant force =

\( \sqrt{} {x}^{2} + {y}^{2} \)

A resultant force is the single force and corresponding torque that are produced when adding vectors to a system of forces and torques acting on a rigid body.

R = A + B. Instance 2 To create the resulting vector, two vectors facing the opposite direction are subtracted from one another. Here, the vector B is pointing in the opposite direction of the vector A, and the resulting vector is called R.

A force system is a group of forces that interact at specific locations (may also include couples). Therefore, the collection of forces shown on any free body diagram is a force system. A group of forces is simply referred to as a force system.

Therefore, When an item is under the influence of two or more forces, the combined force can be calculated by adding up the separate forces.

Learn more about force system here:

https://brainly.com/question/7494637

#SPJ2

The statement that best describes the first priority of public works during the initial response is: B. Provide an initial assessment of the damages to all community services

Public works are defined as a broad category of infrastructure projects, that are financed and constructed by the government, for recreational, employment, and health and safety uses in the greater community.

They include works (such as schools, highways, docks) constructed for public use or enjoyment especially when financed and owned by the government.

Looking at the given options, the one that best describes the first priority of public works is Option B

Read more about Public Works at: https://brainly.com/question/12458747

#SPJ1

The missing options are:

A. Review reports and other data to provide a preliminary damage assessment

B. Provide an initial assessment of the damages to all community services

C. Restore solid waste management services, repair facilities, and clear streets

D. Assist with life safety activity by providing equipment and technical expertise