A double-threaded Acme stub screw of 2-in. major diameter is used in a jack having a plain thrust collar of 2.5-in. mean diameter. Coefficients of running friction are estimated as 0.10 for the collar and 0.11 for the screw.
a. Determine the pitch, lead, thread depth, mean pitch diameter, and lead angle of the screw
b. Estimate the starting torque for raising and for lowering a 5000-lb load.
c. What is the efficiency of the jack when raising the load?
d. Would the screw overhaul if a ball thrust bearing of negligible friction were used in place of the plain thrust washer?
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Related Questions
A 100 MHz generator with Vg= 10/00 v and internal resistance 50 ohms air line that is 3.6m and terminated in a 25+j25 ohm load
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The value of Vz at point z from the generator = 17.748 ∠ -107.62° V
Given data :
Internal resistance = 50 ohms
Vg = 10 ∠ 0° v
length of air line = 3.6 m
Terminating resistance = 25 + j25 Ω
First step : Determine the Total impedance
Total Impedance ( z ) = Rin + Rline + Rl + jXl
= 50 + 50 + 25 + j25
= 125 + j25 ≈ 127.47 ∠ 11.3°
Next step : Determine the current in the circuit
current ( I ) = Vg / z
= ( 10∠0° v ) / ( 127.47 ∠ 11.3° )
= 0.0784 ∠ -11.3 amp
Final step : Determine the value of Vz at point z from the generator
Vz = ( Vg + I * Ri ) - ( RI * I + Rline * I )
= ( 10∠0° + 0.0784 ∠ -11.3 * 50 ) - ( 25 + j25 + 50 * 0.0784 ∠ -11.3 )
= -5.37 - j16.91 ≈ 17.748 ∠ -107.62° V
Hence we can conclude that the value of Vz at point z form the generator 17.748 ∠ -107.62° V
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Hello your question is incomplete below is the complete question
A 100 MHz generator with Vg =10< 0 degree (v) and internal resistance 50-ohm is connected to a lossless 50-ohm air line that is 3.6m long and terminated in a 25+j25 (ohm) load.
Find (a) V(z) at a location z from the generate.
Fresh ideas or title to be researched for civil engineering individual final project for diploma students also can extend the topic later while doing degree as well? please help me I'm running out of time...
Answers
Answer:
What type of projects do civil engineers work on?
Civil engineers design major transportation projects. Civil engineers conceive, design, build, supervise, operate, construct and maintain infrastructure projects and systems in the public and private sector, including roads, buildings, airports, tunnels, dams, bridges, and systems for water supply and sewage treatment
Explanation:
A student borrows $60,000 for business school at 6.5% stated annual interest with equal monthly payments over 10 years. Consider this as a loan with no payments or interest during school so that the problem structure is equivalent to a standard loan received one period before the first payment. How much is the monthly payment?
Answers
Answer:
$681.29
Explanation:
The amortization formula seems to apply. The monthly payment on a loan of P at rate r for t years is ...
A = P(r/10)/(1 -(1 +r/12)^(-12t))
For the given loan parameters, the monthly payment is ...
A = $60,000(0.065/12)/(1 -(1 +0.065/12)^(-12·10)) ≈ $681.29
The monthly payment is $681.29.
Discuss what is an ore.
Answers
Answer:
a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.
Explanation:
yw
Answer:
Ore is an accumulation of any mineral mixed with other elements. The mineral content of an ore must be in sufficient concentration to make its extraction commercially and economically viable.
Hope it helps.
If you have any query, feel free to ask.
The current standard for recovery only equipment is sae
Answers
Explanation:
I think is SAE standard J2810
Special impact sockets and extensions are easily
identified because they are:
(A) chrome.
(B) aluminum.
(C) flat black
Durant la sto
(D) hard rubber.
les
Answers
Answer:
C
Explanation:
they are flat black
For flow of a liquid metal through a circular tube, the velocity and
temperature profiles are u(r)=2Um[1-(r/ro)2] and T(r) - Ts
= C2 [1 – (r/r0)2],respectively, where C2 is constant. What is the value of the Nusselt
number NuD at this location?
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Answer:
Known: Form of the velocity and temperature profiles at a particular axial location for flow in a circular tube. Find: Nusselt number at the prescribed.
Explanation:
convert number 23.35 in to binary
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A stress of 2500 psi is applied to a polymer serving as a fastener in a complex assembly. At a constant strain, the stress drops to 2400 psi after 100 h. If the stress on the part must remain above 2100 psi in order for the part to function properly, determine the life of the assembly.
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NO LINKS
what was the main drawback of ford's assembly line
A.)the cars broke down quickly
B.)production of the cars required many hours of labor
C.) The cars required a lot of fuel to run
D.)production was not flexible
Answers
Answer:
D. Im pretty sure at least. you're welcome
How to find Catenary length in sag
Answers
Answer:
buter uwu heheheheh joke
9. An automobile's oxygen sensor output needs
to be checked. Technician A uses a digital
voltmeter to check this sensor's output.
Technician B uses an analog ohmmeter to
check this sensor's output. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
Answers
Answer:
the answer is Letter C
Explanation:
DON'T TRULY TRUST ME PLEASE..
I will give Brainliest, please help. :)
Jordan is mixing water and flour to make tortillas. The number of cups of water, w, needed for f cups of flour is described by the equation w = 0.75f.
What does 0.75 tell us in this situation?
Answers
Answer:
The ratio of water to flour needed to make tortillas, which is 3 : 4
Explanation:
100 w = 75 f
w/f = 75/100 = 3/4
NO LINK plsssss just answer
1. What are some pendulum wave characteristics?
2. What are waves characteristics?
3. List characteristics that they both share
Answers
Answer:
Explanation:
The separation and purification process is used for which of the following purposes?
Household cleaning
Developing vaccines
Identifying chromosomes
Documenting chemical reactions
Answers
The separation and purification process is used for DEVELOPING VACCINES. The development of vaccines must follow strict guidelines.
A vaccine is a biological preparation used to protect against harmful diseases (e.g., viruses) in a simple and safe manner.
Vaccine purification is a strict process consisting of clarification, concentration and chromatography in order to separate the extract that contains the active principle of the vaccine.
The techniques used for vaccine filtration include membrane filtration, depth filtration and centrifugation.
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Determine the mass density of an oil if 0.3 tonnes of the oil occupies a volume of 4m.
Answers
Answer:
Do you mean 4m^3 and 3.0 tones?
Explanation:
solution:
Mass = m = 3.0 tones
- 1 ton = 1,000 kg
= 3.0 × 1,000
= 3,000 kg
volume = v = 4m^3
Required:
Mass density of oil = p = ?
We know that;
[tex]p = \frac{mass}{volume} = \frac{m}{v} = \frac{3000}{4} = 750kg |m^{3} ans [/tex]
The answer is:
750kg / m^3
i) A sag vertical curve is to be designed to join a 4% grade to a 2% grade. If the design
speed is 50 mi/h, determine the minimum length of the curve. Assume a = 11 ft /sec2 and
perception-reaction time = 2.5 sec. Consider the following criteria:
a) Stopping sight distance
b) Comfort
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Answer:
=4/5 because I'm not going to go back in a year meaning that they are you are
1. Declare a variable named num with an
initial value of 0. Create a while loop that
will print "Keep going" as long as the value
of num is less than 5. Use window.alert()
for displaying the output.
2. Create a function named showProd that
returns the product of n1 and n2.
3. Using the new keyword, create an array
named info with three (3) values: your first
name, your nickname, and your last name.
Answers
The code to
Declare a variable and increment with a while loop until the variable is not less than 5Create a function that returns the product of two numbersUses the new keyword to create an arraywere written in JavaScript and are found in the attached images
Declaring a variableThe first code declares a variable called num and gives it an initial value of 0. It then enters a while loop that lauches a message box (using window.alert) to print the message "Keep going" as long as num remains less than 5.
If nothing is done within the loop to increment num towards the value 5, the loop will go on endlessly notifying the user to "Keep going".
So, an increment of 1 was added to the loop body to increment the variable num. This makes sure the loop terminates.
Creating a function that returns the product of two numbersHere, a function was created that receives two arguments (n1 and n2), then returns the product (n1 * n2)
Declaring an ArrayThis last code segment creates an array using the new keyword. The new keyword is generally used in constructing objects.
In this case the object constructed is an array having three strings;
my first namemy nickname, andmy last nameSee another solved JavaScript problem here https://brainly.com/question/23610566
All forms of energy can be transformed into what form of energy, often times as waste?
Answers
what's make oil boil?
Answers
When a tensile specimen is stretched in the plastic region to an engineering strain of 0.2, calculate the amount of cold work percent.
Answers
Answer:
0.2 x 100
Explanation:
Engineering strain is the original crossection/original crossection
cold work percentage is
original crossection/original crossection x 100
When is the output of a NAND-gate HIGH?
Answers
Answer:
In digital electronics, a NAND gate (NOT-AND) is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate. A LOW (0) output results only if all the inputs to the gate are HIGH (1); if any input is LOW (0), a HIGH (1) output results.
Write the Boolean expression of the output (X) for the below Logic Diagram.
Answers
X= A+B.C+D
I hope it helps
The example of using biotechnology in heart surgery is used to illustrate which of the
following points?
Even advances in biotechnology cannot save every life.
There are many life-saving benefits of biotechnology.
The ethical issues in biotechnology do not apply to surgical fields.
The cost of advances in biotechnology is too high to make this care available to
all.
Answers
Answer:
There are many life-saving benefits of biotechnology.
Explanation:
determine the values of the forces acting at A and B for the forces system
Answers
Answer:
You forgot the image and or example. I mean the answer could be anything right now.
Write matlab code for motion of a car first order system
Answers
Answer:
Vehicle Dynamics for use with MATLAB/Simulink (VDMS) is a lumped-parameter, 15 degrees-of-freedom vehicle simulation program that reads input files containing chassis, suspension kinematics and compliances, tire, driveline, and aerodynamic inputs.
Explanation:
hope it helps you
How many shift pulses would be required to serially shift the contents of one five-stage register to another five-stage register
Answers
Answer:
5
Explanation:
One pulse is required for each bit to be moved.
5 pulses are required.
Cellular network towers are configured in such a way so that they avoid what type of problem?
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Answer:
They are configured this way to avoid overlap issues.
Explanation:
how to study thermodynamics?
Answers
It is study of the relationships between heat, temprature, work and energy
What I recommend is that you go through you thermodynamics book and read it carefully highlighting the important points and summarizing them in a spare notebook. The first few chapters are full of indroductory concepts such as the state of a system, processes, closed and open systems, etc. That I reccomend you memorize(with understanding ofcourse) as these are carried on all throughout.
As chapters get more complex I recommend flow charts and mind maps with as much condensed information as possible.
Hope this helps <3
Help me and mark as brainliest plz
A periodic digital waveform has a pulse width 25 and a period of 150 . Determine the frequency and the duty cycle
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The frequency is 6.67 kHz and the duty cycle is:16.67%.
Frequency and duty cycle
Given:
Pulse width=25
Period=150
Frequency:
Frequency=1/(150×10^-6)
Frequency=1/0.00015
Frequency=6.666 kHz
Frequency=6.67 kHz (Approximately)
Duty cycle:
Duty cycle=(25×10^-6)/ (150×10^-6)×100%
Duty cycle=16.67%
Therefore the frequency is 6.67 kHz and the duty cycle is:16.67%.
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