Answer 1:
Choosing the right polarity probably affects the quality and strength of the weld. This is why the changes in the polarity is useful in welding.
Answer 2:
There are different sizes of welding rods available in the market. the majorly used sizes are namely 6010, 6011, 6012, 6013, 7014, 7024 and 7018. The 7013 rod is used for welding low and mild alloy steel.
Answer 3:
The 4 major factors involved in stick welding to make good “consistent” bead are as follows,
Current setting - Determining whether DC positive, DC negative, or AC should be set up in the machine chosen.Length of arc - Do not let the arc stutter. The exact lenth differs with the application and electrode.Speed of travel - The speed should help in maintaining the arc in leading 1/3 of the weld pool.Manipulation of electrode - Practice, observe and develop the technique that would result the best.1. Consider the steady flow in a water pipe joint shown in the diagram. The areas are:
A1=0.2 m², A2=0.2 m², and Az=0.15 m². In addition, Fluid is lost out of a hole at
section 4, estimated at a rate of 0.1m/s. The average speed at section 1 and 3 are
Vi=5m/s and V3=12m/s, respectively. Find the velocity at section 2.
Answer:
-4.5 m/s
Explanation:
Assuming steady and incompressible flow and uniform properties at each section
[tex]V_1A_1+V_2A_2+A_3V_3+Q_4=0[/tex]
Here V is velocity of flow and A is area, Q is flow rate out of the leak, subscript 1-4 represent different sections
At the surface, is negative hence the equation above will be
[tex]-V_1A_1+V_2A_2+A_3V_3+Q_4=0[/tex]
Making the subject of the formula then
[tex]V_2=\frac {V_1A_1-A_3V_3-Q_4}{A_2}[/tex]
Substituting the given values then
[tex]V_2=\frac {(5\times 0.2)-(12\times 0.15)-0.1}{0.2}=-4.5 m/s\\V_2=-4.5m/s[/tex]
7. Determine the resistance of a lamp that draws 3 amperes when connected to a
120volt supply.
Answer: 40 Ω
Explanation:
R =V/I
R= 120/3
R= 40
The resistance of a lamp that draws 3 amperes when connected to a 120volt supply is 40 ohms.
What is Ohm's Law?Ohm's law states that if all physical conditions and temperatures are constant, the voltage across a conductor is precisely proportional to the current flowing through it.
Given the following details,
Current to the lamp = 3 amperesVoltage supplied = 120 VNow, Using Ohm's law we can write,
Voltage = Current × Resistance
V = IR
R = V / I
R = 120 V / 3 ampere
R = 40 ohms
Hence, the resistance of a lamp that draws 3 amperes when connected to a 120volt supply is 40 ohms.
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What is the general term for a substance that is harmful to life and may cause death?
innocuous
toxic
benign
hypoallergenic
1.) Explain the job description of a Civil Engineer...
Answer:
They create, improve, and protect the environment that us humans live in. They oversee the way something's may look like construction for example, they plan and then design. This can do with any type of new construction for anything. Basically, they try to help design things that can improve and protect our world and daily living.
2. Why are some constraints automatically applied by the software, but you must manually apply others?
Answer:
It is because constraints applied automatic by the software (CAD) are supposed to control relationships and geometry between lines, arcs and circles while those manually added are supposed to control the geometry to behave in the manner the user likes the sketch to appear when drawing.
Explanation:
CAD software enables creating sketches using the program by automatic allowing geometric constraints to perform the tasks.Geometry in lines, circles, and other geometric features show collaborating relation that facilitate sketching in the program.For example, two end points appear to make lines remain perpendicular.Other geometric constraints are parallel, and equal.However, the user can manually apply geometric constraints to a sketch to force the geometry in a manner that is suitable to the sketch drawn.That is why a user must manually apply others.
deep-sea trench under the ocean is MOST similar to a _____ on land. A. plateau or plain B. valley or canyon C. peak or mountain D. forest or grassland
Answer:
The answer is B, as they run deep, severely lower than the surrounding land.
I hope this helps!
The four applicants for a $40,000 loan are Robin Smith, Amari Jones,
Jamie Ford and Blake Felder.
Who is the youngest loan applicant?
O Jamie Ford
Robin Smith
Amari Jones
Blake Felder
Answer:
Clearly its Robin smith
Text that is located between <title >and </title > appears in the browser's_____
Answer:
Tab title
Explanation:
The tab title can be defined as the title that shows up in a browser tab known as page title. The title only has texts, other tags within the texts are not considered.
Which of the following terms describes the amount of time that a vehicle can be operated with its headlights on before battery voltage drops to 10.5V?
Group of answer choices
ampere-hours rating
wattage
reserve capacity
cold cranking amps
Answer:
A. Ampere-Hours Rating
Explanation:
mAh is how much amperage a battery can provide for exactly 1 hour.
What are the three most common types of relearn procedures?
Answer:
The three types of relearn procedures are auto relearn, stationary and OBD.
Explanation:
In TPMS system, after the direct service like adjustment of air pressure, tire rotation or replacement of sensors etc, is performed then maximum vehicle often needs TPMS system relearn that needs to be performed.
For performing these relearn procedure, there are mainly three types:
auto relearnstationary relearnOBDAfter applying the relearn process, the TPMS system will again be in proper function.
What happens to material that is eroded by water flowing through a watershed?
A. It creates a flood.
B. It is carried upstream.
C. It is carried downstream.
D. It creates new wetland areas
Introduce the systems found on an electric car, and on an internal combustion engine car.
The systems found on Electric car are- battery pack, Electric motors, Differentials etc.
The systems found on internal combustion vvehicles include- Engine, Flywheel, Propeller shaft, Governor, Pistons and Crankshaft among several other components.
Explanation:
Electrical cars are associated with an electric motor, battery pack and other car accessories. Their propulsive power sets them apart from conventional vehicles. They are driven by a battery pack which is rechargeable and in turn drives the electric motors connected to each of the wheels.
These cars are also conspicuous with the absence of a propeller shaft which provides the power to conventional gasoline vehicles. Instead of the shaft, individual motors present side by the wheels drive them. Depending on the car’s drive ratio (either 2*4 or 4*4), the electric motors present them with sufficient power. Other equipment such as differentials, steering and control unit remains more or less same.
Internal Combustion car- They are the class of conventional vehicles powered by the burning of gasoline in the sealed engine of the car. They are either petrol, diesel variant or gas-powered. The working can be explained as follows-
Gasoline fuel with high calorific value burns in a controlled environment to produce gas which drives the piston which is in turn connected to the crankshaft. The crankshaft is responsible for turning the vertical motion of the piston to the rotatory motion of a ball lever.
Several mechanical components such as spark plugs, differentials, flywheel, governors etc make up for the controlled environment in which the fuel is allowed to burn.
What is a power machine’s “throw”
A. The direct line from a tool.
B. The machine’s horsepower.
C. The speed of the machine’s moving parts.
D. The material the machine operates on.
A city engineer knows that she will need $25 million in 3 years to replace toll booths on a toll road in the city. Traffic on the road is estimated to be 20 million vehicles per year. How much per vehicle should the toll be to cover the cost of the toll booth replacement project? Interest is 10%.
Answer:
$1.38
Explanation:
She will spend $25 million in 3 years at 10% interest is a case of Future Value of Annuity.
Therefore,
FV = A*((1+r)^n-1)/r
Where A = 25,000,000
r=10%=0.1
n=3
FV= 25000000*((1+0.1)^3-1)/0.1
FV=25000000*(1.331-1)/0.1
FV=25000000*(0.331/0.1)
FV=25000000*3.31
FV=$82,750,000
So it is estimated that 20million cars passes through the toll per year
Therefore,
Toll per vehicle per year = 82750000/2000000
=$4.14
Toll for the duration of the project
=4.14/3 =$1.38
If a driver must drive when their signal lights or taillights aren't operating properly, they may instead signal by using their ______.
A) Right Arm
B) Left Arm
Answer:
Left arm because the driver seat is on the left, so it would be easier, and safer, to use your left arm.
But, if you live in an area in which the driver seat is on the right, then it would be the right arm.
The driver signal about the turn in case of tailing or not operating signal lights using his left arm. Thus, option B is correct.
What is the function of Signal lights?The signal lights are the color indicators present at the squares and at different turns that mediates the traffic of a region by allowing the drivers to stop and drive safely over the road.
The indicators being broken allows the vehicle to enter from any lane and thereby increases the chances of accidents. The driver in the following case must signal using their left arm. Thus, option B is correct.
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During world war 1 what process replaced riveting for ship repair
During World War I, riveting remained the primary method for ship construction and repair, with no clear indication that it was replaced during the conflict. Advances post-war led to welding becoming the preferred technique due to its stronger joints and efficiencies.
Explanation:During World War I, the process that began to replace riveting for ship repair was not explicitly mentioned in the provided text, indicating that riveting remained a significant method of construction and repair during this period. However, industrial and technological advancements during and following World War I led to the development and adoption of welding techniques which eventually became more prominent in shipbuilding and repair. Welding offered advantages over riveting, such as stronger joints and a reduction in labor and materials. Nevertheless, during World War I itself, the text highlights the intensive use of riveting, with contests to speed up production and techniques to ensure parts made in different locations could be assembled efficiently on site.
The contribution of riveting to shipbuilding during World War I is underscored by the record set by John Omir and the detailed planning required to assemble ships like the SS Agawam, with parts prefabricated and riveted in various locations before assembly. This period marked a significant effort to boost production in the face of enemy threats, laying the groundwork for future shifts towards welding in ship construction and repair.
4.
In which of these areas is GPS least reliable in giving you an accurate
route?
A. major highways
B. city streets
C. roads that are under construction
D. suburban roads
Roads that are under construction are the areas in which GPS is least reliable in giving you an accurate route.
What is GPS?This is referred to as global positioning system and helps to provide locations for easy navigation.
Roads which are under construction won't give an accurate route due to different diversions and obstructions present which us why option C was chosen.
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Find the amount of energy (Q) required to raise the temperature of the water in kilo joules (KJ).
Given mass of water m = 2kg = 2000g.
Temperature difference ΔΤ = T2 – T1 = 60 °C – 25 °C = 35 °C .
Specific heat of water = 4.18 J/g* °C .
Therefore, Q =
kilo joules.
Amount of energy required = 292.6 kJ
Explanation:
Amount of energy required is given by the equation ,
Q = m × C ×ΔT
where m is the mass of the water = 2000 g
C is the specific heat of water = 4.18 J/g°C
ΔT = Temperature difference = 60 - 25 = 35 °C
Applying these values in the above equation, we will get,
Q = 2000 g × 4.18 J/g°C × 35°C
= 292600 J
When joule is divided by 1000 we will get the amount of energy in kJ.
[tex]$ Q = \frac{292600}{1000} = 292.6 kJ[/tex]
So the energy required to raise the temperature of the water is 292.6 kJ.
how has drafting evolved in the 21st century
Drafting has been around a long time. We can safely assume that since we’ve had a tool in our hands, we’ve been describing plans and technical representations and doodling ideas. Let’s take a closer aspect at drafting and its advance from an under-the-radar part of the method to a very developed skill set.
Explanation
• 1970s – The beginning computer-aided design systems were included in the industry. Following the design engineers tried the learning curve of using CAD, their performance and productivity went through the roof. Over time, CAD software became affordable and more user-friendly, and its fame grew.
• 1990s – CAD software was expanded further to include 3-D characteristics, and quickly the technical designs of the past enhanced increasingly simulated and accessible to engineer.
• Present – The development of drafting has brought us to the present day, were using 3-D representations is the standard and the aim to generate full virtual prototypes.
A biotechnology company produced 225 doses of somatropin, including 11 which were defective. Quality control test 15 samples at random, and rejects the batch if any of the random samples are found defective. What is the probability that the batch gets rejected?
The problem is a hypergeometric distribution scenario, where we calculate the probability of a batch being rejected based on the presence of defective items in a random sample.
Explanation:The question is about calculating the probability that a batch of somatropin doses gets rejected based on a quality control sampling test. To find this probability, we need to consider the number of defective samples in the batch and the number of samples taken for the test. Given that there are 11 defective doses out of 225, we can calculate the probability that none of the 15 randomly chosen samples are defective (which means the batch is accepted) and subtract this probability from 1 to get the probability of the batch being rejected (due to finding at least one defective sample in the test).
Since this is an application of hypergeometric distribution, the exact calculation requires combinatorial analysis, which would provide the probability of picking 0 defective doses in a sample of 15 from a lot of 225 doses which includes 11 defects.
Delilah studies and manages natural resources to protect the environment. Her job title is best described as
Delilah's profession, focusing on the study and management of natural resources, is best described as an Ecologist. This role requires an undergraduate degree in natural science and often further specialized training, with an important emphasis on mathematics and statistics.
Explanation:Delilah's job, focused on the study and management of natural resources to protect the environment, is best described as an Ecologist. Ecologists play a crucial role in understanding ecological issues, which can help meet basic human needs and inform policy decisions on environmental matters. They may work in various settings, including laboratories, universities, policy advisory roles, and on-site in natural environments. As an ecologist, Delilah would be involved in sustainable management strategies, conservation biology, and possibly working on issues concerning land ownership and its impacts on environmental policy, especially relevant to the gender gap observed in environmental management in the developing world.
To become an ecologist generally requires at least an undergraduate degree in a natural science, often followed by specialized training or an advanced degree, depending on the specific area of ecology. A strong foundation in mathematics and statistics is also essential for a career in ecology, as these skills are critical for conducting research and analyzing environmental data.
Which of the following waste characteristic is considered to be hazardous:
A. Ignitable waste
B. Corrosive
C. Reactive
D. All of the above
Answer:
D) all of the above
Explanation:
List two characteristics of computers.
Answer:
They are efficient, fast and accurate
They have large storage space
Explanation:
Computers are efficient, fast and accurate hence complex mathematical problems can be solved with several programs and software installed in a computer. Additional, storage capacity of computers are high with most recent computers having storage capacity of 1 TB
This graph represents the motion of a car while driving over a short distance. Which statement accurately describes the motion of the car in this graph?
It is going backwards fast, then it is going backwards slowly.
Explanation:
Motion is a term which is used in Physics. It is the change in the position of an object with time because of some force that is acting upon the object.
In mathematics, motion is described and defined as the and in the terms of the speed, time and the change or the displacement of an object from it's original place. This is because of the force acting upon the object.
Answer: d
Explanation:
Can you tell me important facts about Peggy A. Whitson?
Answer:
Peggy Annette Whitson was born February 9, 1960, Mount Ayr, Iowa, U.S.
She was the first female commander of the International Space Station.
She holds the record among American astronauts and among women for spending the most time in space, nearly 666 days.
She received a B.S. in biology and chemistry from Iowa Wesleyan College in Mount Pleasant, Iowa, in 1981 and a doctorate in biochemistry from Rice University in Houston in 1985.
She flew into space for the first time on June 5, 2002, as a flight engineer on Expedition 5 to the ISS, aboard the space shuttle Endeavour on mission STS-111.
She, from 2009 to 2012, Whitson was chief of the Astronaut Office, which oversees all NASA astronaut activities, including crew selection and training.
She was the first woman and the first civilian to hold that position.
She was sent into space 3 times.
Her total of 10 career spacewalks and their combined duration of 60 hours 21 minutes were records for a female astronaut.
She retired from NASA in 2018.
Describe the general guidelines in creating rough sketches.
Answer:
- Make the sketch proportional to the desired shape.
- Keep sketches simple.
- Exaggerate the geometric features of the shape.
- Draw geometry so that it does not overlap.
- Sketches should form a closed region.
Explanation:
What works for me is to just try to draw as many shapes as possible then merge them together. Hope that helps! :)
Practicing new things strains your brain fibers, weakening your ability to make connections.
A) True
B) False
Answer:
B
Explanation:
Practicing new things only makes your brain stronger
Is there a way to get the answers to a NCCER book test?
Answer:
go on google and type NCEER book answers
No, there is no legitimate way to obtain the answers to an NCCER book test.
Is it possible to access answers for an NCCER book test?Attempting to acquire the answers to an NCCER book test through unauthorized means is unethical and against the rules set by the National Center for Construction Education and Research (NCCER).
The purpose of these tests is to assess the knowledge and competency of individuals in their respective trades. Obtaining the answers without studying and understanding the material undermines the integrity of the assessment process and does not contribute to genuine learning or skill development.
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A sum of $500,000 will be invested by a firm two years from now. If money is worth 12%, what will be the worth of this investment 10 years from now?
Answer:
investment 10 years from now is $1,238,000 .
Explanation:
given data
sum = $500,000
rate = 12% =0.12
total time = 10 year
solution
as present value After 2 years from now is $500,000
so time period is now = 8 year ( 10 - 2 )
so we apply future value formula that is
Future value = present value × [tex](1+r)^{t}[/tex] ............1
put here value we get
Future value = $500,000 × [tex](1+0.12)^{8}[/tex]
Future value = $500,000 × 2.476
Future value = $1,238,000
so investment 10 years from now is $1,238,000 .
4.2 A vapor compression refrigeration machine uses 30kW of electric power to produce 50 tons of cooling. What is
its COP?
Answer:
5.833
Explanation:
Coefficient of Perfomance (COP) is the ratio of refrigeration effect to power input.
[tex]COP=\frac {RE}{P}[/tex] where RE is refrigeration effect and P is power input
Here, the power input is given as 30 kW
We also know that 1 ton cooling is equivalent to 3.5 kW hence for 50 tons, RE=50*3.5=175 kW
Now the [tex]COP=\frac {175}{30}=5.833[/tex]