The reel has a weight of 150 Ib and a radius of gyration about its center of gravity of kG = 1.25 ft. If it is subjected to a torque of M = 25 Ib ft. and starts from rest when the torque is applied, determine its angular velocity in 3 seconds. The coefficient of kinetic friction between the reel and the horizontal plane is

Answers

Answer 1

angular velocity of the reel after 3 seconds is 5.11 rad/s. We cannot calculate the frictional force without knowing the coefficient of kinetic friction.

To solve this problem, we need to use the principle of conservation of energy and the equation of rotational motion.
First, let's calculate the moment of inertia of the reel. The moment of inertia is given by the formula:
I = Mk^2
where M is the mass of the reel and k is the radius of gyration about its center of gravity. We are given that the weight of the reel is 150 Ib, so we can convert this to mass using the formula:
M = W/g
where W is the weight of the reel and g is the acceleration due to gravity. Substituting the given values, we get:
M = 150/32.2 = 4.66 slugs
Now we can calculate the moment of inertia:
I = Mk^2 = 4.66 (1.25)^2 = 7.3125 slug-ft^2
Next, let's find the work done by the torque on the reel. The work done is given by the formula:
W = MΔθ
where M is the torque and Δθ is the angular displacement. We are given that the torque is 25 Ib ft and the reel starts from rest, so initially Δθ = 0. At the end of 3 seconds, the angular displacement is given by:
Δθ = ωt + (1/2)αt^2
where ω is the final angular velocity, α is the angular acceleration, and t is the time. We are asked to find the final angular velocity after 3 seconds, so we rearrange the equation and substitute the given values:
ω = (Δθ - (1/2)αt^2)/t = (0.5)(α)(t) = (0.5)(τ/I)(t)
where τ is the torque and I is the moment of inertia. Substituting the given values, we get:
ω = (0.5)(25/7.3125)(3) = 5.11 rad/s
Finally, let's find the frictional force acting on the reel. The frictional force is given by the formula:
f = μN
where μ is the coefficient of kinetic friction and N is the normal force. The normal force is equal to the weight of the reel, which we already calculated to be 150 Ib. We are not given the value of μ, so we cannot calculate the frictional force.

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Memory is the ability to take in information from the surrounding environment, process it, store it, and then recall it at a later time—sometimes years later. A memory storage system or filing cabinet are frequently used as analogies for human memory.

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Fibonacci Sequence Submit + Continue New + Save Output Test Cases Docs Grade Assignment More Fibonacci.Java =

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A Fibonacci series in Java is a sequence of numbers such that every third number is equal to the sum of the previous two numbers.

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Technician A says that some people refer to the blower motor fan
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Required information A flat quadrilateral plate finite element is shown. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. node 4 node 3 node 1 (20, 20, 12) cm node 2 (25, 40, 7) cm node 3 (0,35, 13) cm node 4 (5, 20, 15) cm r node 1 node 2 Determine the unit vector outward normal direction to the surface (i.e., pointing away from the origin). The unit vector is û = O The unit vector is i O i Oł ).

Answers

The surface's unit vector's outward normal direction (i.e., pointing away from the origin). û = O is the unit vector. It is I O I O for the unit vector. is u equal to 0.1924i, 0.1924j, and 0.9622k

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0.35.1 cm for Node 3

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Each side's cartesian shape

a = 5i + 20j - 5k

b = -15i + 0j + 3k

c = 5i - 15j + 2k

d = 25i +5j - 6k

The surface's unit vector's outward normal direction is:

c*d/I c*d = u I\s= 80i+80j+400k/415.69

u = 0.1924i + 0.1924j + 0.9622k

A quantity or phenomena with independent directions and magnitudes is called a vector. The phrase also describes how such a quantity is represented mathematically or geometrically.

In nature, vectors may be found in electromagnetic fields, weight, momentum, force, and velocity. The force created when gravity accelerates a mass is known as weight.

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Welding fumes can cause serious health problems for workers if inhaled, according to OSHA.

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The esr in the capacitor refers to the value that represent the loss of useful energy in a simple electronic circuit consisting of a resistor

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A new split system should be checked for leaks by;

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A new split system should be checked for leaks by; pressurizing the system with a few ounces of system refrigerant and an inert gas.

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The compressor, propeller fan, circuit board, and heat exchange coil are all located in this area of the air conditioning system. It is outside and moves refrigerant to and from the indoor unit it is paired with.

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Calculate v and ix in the circuit of Fig. 2.79.

Answers

The expression for the voltage across the resistor is v=6V and I^ x=-4A

Step by step explanation:            

The current in the loops are, I^ 1 in loop 1 and I^2 in loop 2
Apply Kirchhoff's voltage law to loop 1.
10=12i^ 1 +4
10-4=12i^ 1
12i^ 1=6
I^ 1 = 6/12=0.5 A        

Write the expression for the voltage across the resistor:                                    
V=12I^ 1
=12(0.5)
v=6V            
               
Apply KVL in loop 2:
3i^ x+16=4
3i^ x=-12
I^ x=-12/3                  

I^ x=-4A

Kirchhoff's Voltage Law describes the distribution of electrical voltage within an electrical circuit's loop, or closed conducting path. According to Kirchhoff's Voltage Law.

Any loop's algebraic sum of voltage (potential) differences must equal zero.

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in a typical client-server database application, the client is called the ____.

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Typically, the client is referred to as the front-end in client-server database applications.

What is a "database"?

An organized group of data that is electronically accessible and stored is referred to as a database in computing. Large databases are housed on computer clusters or cloud storage whereas small databases can be kept on a file system. Database design involves both formal methods and pragmatic factors, such as representing data, effective data representation and storage, query languages, privacy and security of sensitive data, as well as distributed computing problems, such as continuing to support concurrent access and fault tolerance.

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The repair order must detail why the vehicle is in for repairs or what the customer is complaining about. What’s this known as on the repair order?

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The repair order must detail why the vehicle is in for repairs or what the customer is complaining about. Note that this on the repair order is known as Problem Description.

What is the use of a Repair Order?

A repair order is a document used in an automotive repair shop or service center to document the details of a repair job.

It contains information about the vehicle, the customer, the problem or reason for the repair, the work done, and the repair cost. It is used as a record of the work done and for billing and warranty purposes.

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what is meant by the term "high efficiency purge unit

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Those purge units which discharge a high percentage of refrigerant with the air which they remove.

what is meant by the term "high efficiency purge unit?

The refrigerant may leave the system together with air and moisture while the purge unit is running. The amount of refrigerant removed along with the air by a high-efficiency purge unit is negligible. On the other hand, an ineffective purge unit will continue to leak a significant volume of refrigerant.

The high efficiency purge unit is made up of a self-contained control system, a refrigerant-cooled condenser tank, a magnetic drive oil pump with three-way suction and discharge valves, connecting tubing, strainers, and driers.

The primary goal of the purge system is to keep the refrigeration system free of moisture and non-condensable gases (air). An rise in condensing pressure brought on by the buildup of non-condensable gases within the system lowers operating efficiency.

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Calculate I_o In The Circuit Of Fig. 2.91

Answers

v=2v and I^ 0=1 A  

Explanation:          

Apply KCL at node(1)                          
=V-10/8+V/3+V/6=0
=3v-30+8v+4v/24=0
=15v=30

v=30/15

v=2v.        

Therefore:

I^ 0=10-v/8
I^ 0=10-2/8

I^ 0=1 A            

A node in a circuit is previously defined as a point where two or more circuit elements are connected together. Kirchoff’s current law (abbreviated "KCL") states that the sum of all currents entering and exiting a node must equal the sum of all currents entering and exiting the node.

In other words, the net current entering (or leaving) any circuit node must be zero. This law is essentially a statement of charge conservation: if the net current entering any node is greater than zero, there will be a net buildup of charge at a point in a circuit over time.
             

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An arbitrary temperature scale

Boiling water temperature __

Room temperature __

Ice water temperature__

Boiling nitrogen temperature __

Absolute zero__

Answers

Answer:

he j get too much to do and l don't know to check to yi

How many radians are in a complete circle of 360 degrees?

Answers

Answer:

2 radians

Explanation:

The size of a radian is determined by the requirement that there are 2 radians in a circle. Thus 2 radians equals 360 degrees. This means that 1 radian = 180/ degrees, and 1 degree = /180 radians.

Final answer:

A complete circle in angular measurement is divided into 2*pi radians, which is equal to 360 degrees.

Explanation:

A complete circle measures 360 degrees in the English system of measurement. However, when it comes to angular measurement in mathematics, a complete circle is divided into 2*pi radians. Since the circumference of a circle is given by the formula C = 2*pi*r, where r is the radius, the circumference is equal to 360 degrees. Therefore, 2*pi radians is equivalent to 360 degrees.

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Calculate the backwash velocity necessary to expand a sand filter with an effective size of 0.6 mm and a uniformity coefficient of 1.3. This medium (or any other, for that matter) can be cleaned at a backwash velocity of 0.3 m/min if the fluidization is provided by air scour. Calculate the volume of water saved during a 10 min backwash of a 2 by 4 m filter if air scours is used. If the cost of water production is 25 BDT/m3, how much money would be saved per year by air fluidization if the filter runs on average 2 days in length?

Answers

The backwash velocity necessary to expand a sand filter with an effective size of 0.6 mm and a uniformity coefficient of 1.3 is 15.6 mm/min or 0.156 m/min

The volume of water saved during a 10 min backwash of a 2 by 4 m filter if air scours is used is 4560 L

The money that would be saved per year by air fluidization if the filter runs on average 2 days in length is 8.1*10^5 BDT/year.

How can you calculate the backwash velocity, volume of water and money to be saved?

To calculate the backwash velocity necessary to expand a sand filter with an effective size of 0.6 mm and a uniformity coefficient of 1.3, the following formula can be used:

Backwash velocity = (effective size * uniformity coefficient) / 3

Plugging in the values, we get:

Backwash velocity = (0.6 mm * 1.3) / 3 = 0.26 mm/s

To convert this to meters per minute, we multiply by 60:

Backwash velocity = 0.26 mm/s * 60 = 15.6 mm/min or 0.156 m/min

The fluidization is provided by air scour, which can clean the medium at a backwash velocity of 0.3 m/min.

To calculate the volume of water saved during a 10 min backwash of a 2 by 4 m filter if air scours is used, we can use the formula:

Volume of water saved = (filter area * backwash time * water flow rate) - (filter area * backwash time * air flow rate)

Plugging in the values, we get:

Volume of water saved = (2 m * 4 m * 600 L/min) - (2 m * 4 m * 0.3 m/min) = 4800 L - 240 L = 4560 L

If the cost of water production is 25 BDT/m3, the money saved per year by air fluidization if the filter runs on average 2 days in length can be calculated as:

Money saved per year = (volume of water saved per backwash * number of backwashes per year) * (cost of water production)

Plugging in the values, we get:

Money saved per year = (4560 L/backwash * 365 / 2 days/year) * 25 BDT/m3 = 8.1*10^5 BDT/year

Therefore, the correct answers are as given above

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Which of the following commands can be used to check if TCP port 80 is open on the remote host 10.0.0.3? O ping O dig O nslookup O telnet

Answers

Telnet can be used to check if TCP port 80 is open on the remote host 10.0.0.3 by running the command "telnet 10.0.0.3 80" in the command prompt. If the port is open, you will see a blank screen and be able to type, otherwise you will see a message indicating that the connection could not be established.

What is Telnet?

Telnet is a network protocol that allows users to connect to a remote host and run commands on that host as if they were logged in locally.

Telnet uses a virtual terminal connection to enable communication between the two systems, allowing users to log in to a remote host and run commands, as well as to transfer files.

Telnet is an unencrypted protocol and data is sent in plaintext, which makes it vulnerable to eavesdropping and man-in-the-middle attacks, for this reason it's not recommended to use telnet anymore and replaced with SSH(Secure Shell)

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What is the basic law concerning transformers?

Answers

The basic law concerning transformers is the law of conservation of energy, which states that energy can neither be created nor destroyed, only transformed from one form to another.

What is transformers?
Transformers
are electronic devices that are used to change the voltage, current, or frequency of alternating current (AC) electricity. They are important components in electrical power systems, allowing power to be transmitted over long distances and between different voltage levels. Transformers consist of two coils of wire, known as the primary and secondary windings, with an iron core in the middle that serves to link the two coils together. When an alternating current is applied to the primary winding, it creates an alternating magnetic field, which in turn induces a voltage in the secondary winding.

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Shanika is an engineer at an amusement park who is experimenting with changes to the setup for a magnetic roller coaster ride. In one ride, there are two identical roller coaster cars (orange and green) that start on opposite sides of a large magnet located at the center of a station. Shanika wants to get the largest increase in potential energy she can by moving one car one space to the left or the right.

Answers

Shanika needs to move the orange coaster car to point B. This movement will result in the greatest potential energy increase.

What is potential energy?

Potential energy is stored energy that is influenced by the relative position of various system components. The potential energy of a spring increases when it is compressed or stretched. When a steel ball is raised above ground, it has more potential energy than when it falls to Earth.

In the elevated position, it can do more work. Potential energy is a property of a system, not an individual body or particle; for example, as the Earth and raised ball are separated, the system has more potential energy.

Potential energy exists in systems with parts that exert varying magnitudes of forces on each other based on their configuration, or relative position.

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A river water supply is treated by the sequence of the unit operations and chemicals listed below. State the purpose or purposes for each unit process and chemical application in a few words.
(a) Pre-sedimentation with polymer application
(b) Mixing and flocculation with additions of alum and polymer
(c) Addition of activated carbon
(d) Sedimentation
(e) Granular-media filtration
(f) Post chlorination

Answers

Note that where a river water supply is treated by the sequence of the unit operations and chemicals listed above, the purpose or purposes for each unit process and chemical application are:

(a) Pre-sedimentation with polymer application: Removes large particles

(b) Mixing and flocculation with additions of alum and polymer: Coagulate and settle particles

(c) Addition of activated carbon: Remove dissolved impurities

(d) Sedimentation: Settles particles

(e) Granular-media filtration: Removes small particles

(f) Post chlorination: Kills bacteria, and adds chlorine for disinfection.

Note that the above process is called Water Treatment.

What is Water treatment and why is it important?

The method described above is known as water treatment or sewage treatment.

It is a set of physical, chemical, and biological techniques used to purify water and make it suitable for human consumption or use in industrial operations. Depending on the source and kind of water being treated, this process or technology is also known as wastewater treatment.

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member abc, which is supported by a pin and bracket at c and a cable bd, was designed to support the 13-kn load p as shown. knowing that the ultimate load for cable bd is 100 kn, determine the factor of safety with respect to cable failure.

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When transverse loadings are applied to a beam or frame, the axial force, normal force, or both may develop as internal forces.

The internal loads that result are c=Nc = -4.32 kip, V c=0.54 kip, and M c=2.16 kip. Ft Solution: The beam ab is supported by a cable BC and a pin at A. 120 I b/ft is the weight of the beam AB. 180 Ib/ft is the weight of the cable BC. Identify the loading at the beam's center AB (P ab). P ab = AB Beam Weight * AB Beam Length. For the weight of beam AB and its length of 12, substitute 120 I b/ft. Convert the unit from I b to kip using P ab=120*12 =1,440 I b. P ab = 1,440 I b*1,44 kip/1,000 I b. When transverse loadings are applied to a beam or frame, the axial force, normal force, or both may develop as internal forces.

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3 1 point Categorize the processes below as redow or acid/base

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Categorize the processes of Redox reaction and ACID/BASE ( r x n)


The processes of Redox reaction are                                                                  
digestion of gold in Aqua Regia
photosynthesis
Disinfection of swimming pools with chlorine            

The processes Acid/base reaction are                      
stomach digestion
buffering of heart          
burn with sodium citrate
Preparation of soup    

The term "redox reaction" refers to the oxidation-reduction reaction that occurs on the surface of metals. This is the accumulation and transfer of electrons that occurs when two dissimilar atoms interact, most notably in ionic bonding. These two reactions happen at the same time and are known to be inseparable.

Acid–base reaction, a type of chemical process defines the exchange of one or more hydrogen ions, H +, between species that may be neutral (molecules such as water, H 2 O; or electrically charged (ions such as ammonium, NH 4+).  

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___a message sent by one device (such as a network interface card) to another device (such as a switch) to check that the link between the two is operating. This signal is sometimes referred to as a heartbeat.

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Keepalive a message sent by one device, such as a network interface card, to another device, such as a switch, in order to check that the link between the two devices is operating. This signal is sometimes known as a heartbeat.

Keepalive is a signal transmitted from one device to another device(s) in order to maintain the connection between two or more devices. Keepalive signal thus allows a service to be kept highly available.

Therefore, a keepalive is a message used to check that the link or connection between the two devices is operating as well as to prevent the link from being broken.

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Which part should be tested?
O Flame sensor
O Expansion valve
O Solenoid valve
O Gas valve

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Part of the gas valve should be examined. Since they are utilised in various situations, there are several types of gas valves.

Oil and gas flow may be controlled with the use of a gas valve. The volume of liquids and gases permitted to pass through pipes is controlled by opening or shutting an aperture. The valve regulates fluid flow by stopping and beginning, altering quantities, controlling direction, regulating pressure, or releasing pressure.

Environments vary from one another. A few are extremely caustic. While some people work under continual intense pressure. Variations of valves have been created over the years due to these variations. There are benefits and drawbacks to each type of valve. Knowing the various types and purposes within the gas and oil business is necessary for successful operation and application.

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