. (20 pts) A horizontal cylindrical pipe (k = 10 W/m·K) has an outer diameter of 15 cm and a wall thickness of 5 cm. The pipe is situated in a stationary air, where the air and surrounding temperature is 27°C. The outer surface temperature of the pipe is 127°C, and the pipe surface has an emissivity of 0.5. Determine the inner surface temperature of the pipe. Use the following air properties for the analysis: k = 0.03 W/m∙K, ν = 20.92 × 10−6 m2 /s, α = 29.90 × 10−6 m2 /s, Pr = 0.70

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:

  4800 watts

Explanation:

Power is the product of voltage and current:

  P = VI = (240 V)(20 A) = 4800 W

The wattage is 4800 watts.

Answer:Total Voltage = 14V

Explanation: it is possible that a circuit  can contain more than one source of electromotive force which can cause flow of current in the same or opposite direction . When the  connection to  voltage sources  allows for current  from the voltage sources to flow in  same direction,it is termed  Series aiding  Thus, the  Total/effective voltage in a series aiding circuit is  computed as the sum of series aiding voltages .

 Here we have the series aiding voltages to be 5V and 9V ,

therefore,

Total Voltage = 5V + 9V

= 14V

Answer:

What specific fluid goes in the windshield wipers.

Distilled water

How much to put in fluid ounces?

There should be a tiny bit more than 3/4 of the way full.

Answer:

r = 1.922 mm

Explanation:

We are given;

Yield stress; σ = 250 MPa = 250 N/mm²

Force; F = 29 KN = 29000 N

Now, formula for yield stress is;

σ = F/A

A = F/σ

Where A is area = πr²

Thus;

r² = 2900/250π

r² = 3.6924

r = √3.6924

r = 1.922 mm

Fire alarm systems produce various signals to alert individuals of a potential fire or emergency. These signals can include:

1. Audible Alarms: Fire alarm systems typically include sirens or horns that emit loud, distinctive sounds to alert people in the vicinity of the alarm. These alarms are designed to be attention-grabbing and easily distinguishable from other sounds in the environment.

2. Visual Alarms: In addition to audible alarms, fire alarm systems often incorporate visual signals such as flashing lights or strobes. These visual alarms are particularly helpful for individuals who may have hearing impairments or for environments with high ambient noise levels where audible alarms may not be as effective.

3. Voice Alarms: Some advanced fire alarm systems are equipped with voice notification capabilities. These systems can deliver pre-recorded or live voice messages to provide specific instructions or information about the emergency. .

4. Vibrating Alarms: Fire alarm systems may also include vibrating alarms, primarily designed for individuals who are deaf or hard of hearing. These alarms use vibrations, such as bed shakers or wearable devices, to alert individuals to the presence of a fire or emergency.

It's important to note that the specific signals produced by a fire alarm system can vary depending on the type and design of the system, as well as the regulations and standards in place in a particular jurisdiction.

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Answer: the stress is 384 pounds per square inch.

Step-by-step explanation:

Let S represent the stress in the material of the pipe.

Let P represent internal pressure of the pipe.

Let D represent internal diameter of the pipe.

Let T represent the thickness of the pipe.

The stress in the material of a pipe subject to internal pressure varies jointly with the internal pressure and the internal diameter of the pipe and inversely with the thickness of the pipe. Introducing a constant of proportionality, k, the expression becomes

S = kPD/T

The stress is 100 pounds per square inch when the diameter is 5 inches, the thickness is 0.75 inch, and the internal pressure is 25 pounds per square inch. It means that

100 = (k × 25 × 5)/0.75

125k = 100 × 0.75 = 75

k = 75/125 = 0.6

The equation representing the relationship becomes

S = 0.6PD/T

If the internal pressure is 40 pounds per square inch, the diameter is 8 inches and the thickness is 0.50 inch, then the stress would be

S = (0.6 × 40 × 8)/0.5

S = 384

Answer:

14 km/hour

Explanation:

Answer:

(C) She would disagree but also point to some instances where they attempted to show some curiosity about her career.

Answer:

Dimensions should be shown in true profile views and refer to visible outlines on the part

Explanation:

Dimensions should be shown in true profile views and refer to visible outlines on the part. Each necessary dimension of an end product should be shown. No more dimensions than those necessary for complete definition should be given. Dimensions should be arranged for optimal readability if at all possible.

Companies that use renewable resources, reduce emissions of harmful chemicals into the environment, and help other firms reduce their waste have taken advantage of sustainable practices or sustainable initiatives.

Yes, companies that use renewable resources, reduce emissions of harmful chemicals into the environment, and help other firms reduce their waste are engaging in environmentally-friendly practices. the negative impact of business operations on the environment.

Using renewable energy sources such as solar, wind, or hydroelectric power Implementing energy-efficient measures to reduce energy consumption Recycling and properly disposing of waste materials to minimize landfill waste Using eco-friendly materials and products that have a lower environmental footprint.

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The flagger should be positioned on the traffic side of the work area and should direct traffic using a stop/slow paddle to ensure safe traffic flow in both directions.

If there is only one flagger available for a two-way operation, they should stand on the side of the road where they can see and hear both lanes of traffic the best. Additionally, they ought to take up a position from which approaching vehicles coming from both directions can see them. To communicate with motorists and make sure they comprehend and follow traffic control signals, the flagger should utilise a paddle or flag with a stop/slow indication. In order to be noticed by cars from a distance, the flagger should also be extremely visible, wearing luminous attire and, if required, utilising appropriate lighting. The flagger must constantly be on high alert and pay close attention to their surroundings.

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The statements made by both technicians are correct. Thus, the correct option for this question is C, i.e. both A and B.

A technician may be characterized as someone whose job involves skilled practical work with scientific equipment, for example in a laboratory. The role of these people is to repair, install, replace, and service different systems and equipment.

The statement of the technician states that a conditionally-exempt small quantity generator is required to use hazardous waste shipment manifests.

While the statement technician B states that maintaining hazardous waste records may be required for at least three years. Both options are correct with respect to maintaining and degrading hazardous wastes.

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A high neutral plane, as seen from the outside, may signify that the fire is only beginning to spread or it may be a sign of inadequate ventilation, overheated combustibles, or a low oxygen environment.

Describe ventilation.

The act of breathing, also known as ventilation, involves moving air into and out of the lungs in order to allow gas exchange with body's internal environment, primarily to expel carbon dioxide and draw in oxygen. All aerobic organisms require oxygen for cellular respiration, which uses carbon dioxide as a waste byproduct and obtains energy from the reaction of oxygen with proteins received form food. Air is introduced into the lungs during breathing, also known as "external respiration," when gas is exchanged in the alveolar through dispersion.

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Answer:

The first Machine Process is Turning.

Explanation:plz mark brainliest if i am right

Answer:

I believe its turning.

Answer:

if you encounter fishing or hunting boats while you are paddling, be courteous.

Give them a wide berth.

Never run overfishing lines. Be aware that anglers may have lines out to the sides of their boat or trolling behind them.

Explanation:

Hiding a key outside to ensure family members can get in if they lose their keys is not an effective physical security measure for your home.

Physical security measures such as changing locks to ensure key control, confirming that a cleaning company is reliable and licensed, and having good relations with neighbors and looking out for each other can all help provide greater security for your home.

Physical security is a type of security that refers to the protection of individuals, devices, and systems from physical events that could result in harm or property loss. This form of security also concerns the safeguarding of intellectual property, such as documents or computer systems. Physical security measures are steps that can be taken to prevent attacks, intrusions, or other unwanted situations in a physical environment. Physical security measures include Locks Alarm systems, Fences, Security personnel, and CCTV cameras.

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Answer:

a) When the switch is off and there's no battery supply, the electric potential difference, or electromotive force E(t), is zero. That means the right-hand side of the given differential equation is zero. Therefore, the solution to the homogeneous differential equation represents the charge on the capacitor:

L d²Q/dt² + R dQ/dt + 1/C Q = 0

In this case, since there's no initial charge or current supplied, Q(t) = 0 for all t.

b) When the switch is turned on and a 12-Volt battery is connected:

i. The method of Undetermined Coefficients:

We can solve this by proposing a particular solution that has the same form as the non-homogeneous term, E(t). As E(t) = 12 volts is a constant, we propose Q(t) = A as a constant.

After substituting Q(t) = A into the equation, we would be able to find the value of A, which would give us the particular solution. The general solution would then be the sum of this particular solution and the solution to the homogeneous equation (obtained from part (a)).

ii. The method of Variation of Parameters:

In this method, we would make use of the solutions of the homogeneous differential equation. After finding these, we would propose a solution for the non-homogeneous differential equation in terms of these solutions, and a pair of functions (u and v) to be determined. We then substitute this proposal into the differential equation to obtain a set of two new first-order differential equations for u and v.

c) Once we've found the charge Q(t) in part (b), we can find the current I(t) by differentiating Q(t), as I(t) = dQ/dt.

d) With the given initial conditions (Q = 0.001 C, I = 0 A), we can substitute these into the general solution and its derivative obtained in part (b). We would then solve the resulting system of two equations to find the constants involved, allowing us to determine the specific solution for these initial conditions.

Explanation:

Complex question. Answer depends on data provided and format of equations provided.

Answer:

measures, dissolves, liquid, carbon dioxide, evaporates, water vapor, mold, decompose

The high-side gauge pressure can not be calculated as information given here is not sufficient. The correct option is C.

The pressure of the refrigerant on the high side of the air conditioning system, which is the side of the system following the evaporator, is measured by the high-side gauge pressure.

The type of refrigerant used, the size and architecture of the AC system, as well as the surrounding temperature and humidity, all have an impact on the high-side gauge pressure in an air conditioning system.

Low humidity is typically regarded as advantageous for air conditioning systems since it lowers the quantity of moisture in the air, which can facilitate the system's ability to chill the air.

However, it is impossible to precisely calculate what the high-side gauge pressure should be under these circumstances without knowing more details about the particular AC system.

It is preferable to seek advice from a licensed HVAC expert or review the system's manufacturer's specs.

Thus, the correct option is C.

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Your question seems incomplete, the complete question is attached below:

Answer:

Scalability

Explanation:

just took a test and it was right.

Anemometer

Explanation:

An anemometer is a device used for measuring wind speed and direction. It is also a common weather station instrument. The term is derived from the Greek word anemos, which means wind, and is used to describe any wind speed instrument used in meteorology.

Answer:

a. True

Explanation:

Apply the principle of conservation of mass.

and also the expression for the steady flow energy equation.

kinetic and potential energy effects can be neglected.

The given statement by the inventor who is claiming the development of a device that requires no work or heat transfer input yet is able to produce hot and cold air streams at a steady state is definitely false.

Heat transfer may be characterized as a type of process which involves the migration of heat from one object or component to another by numerous mechanisms like conduction, convection, and/or radiation.

The process of heat transfer may occur where there is a temperature difference between two objects exist. It significantly utilizes the mechanism of exchanging thermal energy between two or more physical systems.

According to the concept of physics, no object or thing has the ability to perform its function without the utilization of any source of heat or energy. Then, how it is possible for that device to produce hot and cold air streams at a steady state.

Therefore, the given statement by the inventor is absolutely false.

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Answer:

Unit test

Explanation:

Defintion: A test of each individual component (often a program) to ensure that it is as defect-free as possible.

Answer:

True

Explanation:

Spray gun plays an one of the most important roles in spray finishing as it directs air to atomize the fluid, gives the particles sufficient velocity to reach the product surface, and shapes the pattern/texture. Hope this helps you as much as intended.

Answer: True

Explanation:

The air cap on the spray gun plays an important role in spray finishing as it directs air to atomize the fluid, gives the particles sufficient velocity to reach the product surface, and shapes the pattern.

A diagram showing a use case diagrams for these requirements is given in the image attached.

A use case diagram is known to be a kind of graphical illustration of a users in terms of their various possible association or interactions within any given system.

A use case diagram in banking can be used to prepare, depict and also to know all the functional requirements of the banking system.

Therefore, Give the use case specification for the banking system services and paying a bill online is given in the image attached.

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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.