A 25mm square cross-section bar of length 300mm carries an axial compressive
load of 50kN. Determine the stress set up in the bar and its change of length when the
load is applied. For the bar material E = 200 GN/m
^2
Answer:
The correct answer is "299.88 mm".
Explanation:
The given values are:
Length,
[tex]l_o=300 \ mm[/tex]
Load,
[tex]P=50 \ kN[/tex]
i.e.,
[tex]=50\times 10^3 \ N[/tex]
[tex]E=200 \ GN/m^2[/tex]
[tex]=2\times 10^5 \ M/mm^2[/tex]
Now,
Stress,
⇒ [tex]\sigma=\frac{P}{A}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{50\times 10^3}{25\times 25}[/tex]
⇒ [tex]=80 \ N/mm^2[/tex]
The change in length will be:
⇒ [tex]\Delta l=\frac{Pl}{AE}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{50\times 10^3\times 300}{25\times 25\times 2\times 10^5}[/tex]
⇒ [tex]=\frac{15000\times 10^3}{1250\times 10^5}[/tex]
⇒ [tex]=0.12 \ mm[/tex]
hence,
⇒ [tex]L=l_o-\Delta l[/tex]
[tex]=300-0.12[/tex]
[tex]=299.88 \ mm[/tex]
True or False? In the electron flow theory, electrons flow from the positively charged body to the negatively charged body.
I think it's false because the theory states that electrons flow from negative to positive. Since electrons are negatively charged, it follows that they are attracted by positively charged bodies and repelled by negatively charged bodies.
Answer:
false
Explanation:
A system that captures incoming solar radiation, stores it, and distributes it throughout a building is called
active solar heating
photoelectric heating
cell heating
passive solar heating
Answer: Active solar heating
Explanation:
Active solar heating is a design which is used for the purpose of storage of solar heat for household purposes. The solar heat is used for heat up the liquid and the energy is transferred to the interior space of the house for later use. It distributes the heat throughout the building. Passive solar heating used for heating and cooling of the building but not reliable for storage purposes. Photoelectric heating convert the incident solar heat into electrical energy. Cell heating is a technology in which the thermal energy in a cell is converted into mechanical energy and it is used in machines.
Jack has been concerned about the rapidly changing green regulations in his state and his ability as a mechanical engineer to keep up with developments in his field relating to green requirements. He wants to talk to his boss about taking a professional sabbatical to increase his knowledge of green mechanical engineering practices. How do you predict Jack will try to convince his boss to agree? (Select all that apply.)
a. Identify how greater knowledge of green mechanical engineering areas, such as robotics or waste management, could extend the company’s service offerings.
b. Explain how a better knowledge of integrated mechanical systems could help the company provide more energy-efficient options to customers.
c. Describe how a smarter selection of more efficient, forward-thinking equipment could help the company’s bottom line.
d. Warn that with regulations and green technology changing so fast, the potential for poor implementation and mistakes is large
Answer:
Option A, B and D
Explanation:
Jack can easily convince boss if he focus around two major aspects of the company
a) Revenue enhancement - Jack must outline the benefits of his research that can be used to improvise customer offerings and hence can be further used to devise more energy-efficient options to customer
b) Reduction in mistakes - Issues such as poor implementation can be avoided with better approach and understanding.
Hence, option A, B and D are correct
please help me bro come on
10. Technician A says that the powertrain control module (PCM) uses the manifold absolute pressure (MAP) sensor to determine the load on the engine and the
amount of fuel needed. Technician B says that, at idle, the MAP sensor voltage will be higher at high altitudes than when at sea level. Who is correct?
O A. Technician A
O B. Technician B
O C. Both Technicians A and B
OD. Neither Technician A nor B
Answer:
your answerbis both technician a and b
Both Technicians A and B because manifold absolute pressure (MAP) sensor can determine the load on the engine.
What is the manifold absolute pressure?The manifold absolute pressure sensor (MAP sensor) serves as one that works with intake air pressure which helps to set out the air and fuel quantities required for the ignition cylinders.
Therefore, the MAP sensor voltage will be higher at high altitudes and determine the load on the engine.
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Do the lands in our
country have similar use?
What is most abundant
use of the land in the
Philippines? How are
these affecting the lives of
the Filipinos on this
certain area?
Answer:
sheosjos widhoe window
Explanation:
How does an engine work?
Answer:
The engine consists of a fixed cylinder and a moving piston. The expanding combustion gases push the piston, which in turn rotates the crankshaft. ... After the piston compresses the fuel-air mixture, the spark ignites it, causing combustion. The expansion of the combustion gases pushes the piston during the power stroke.
Answer:
an internal combustion engine works by combination air fuel and spark all at the right time as well as compression to cause an explosion and push the piston back down and spin the crank shaft wich goes to output
Limitations that must be taken into account when designing your solution.
constraints
criteria
Scientific Method
voids
Answer:
Option A, Constraints
Explanation:
The limitations of any design solution is known as constraints. These constraints include the following -
a) Available funds
b) Resources
c) Time.
Hence, option A is correct
PLZZ HELP ILL GIVE BRAINLYEST PLZZ HELP
Distinguish how requirements contribute to the design process.
Answer:
If someone requires you to do something, like no blue, you have to change the blue to another color.
Please help i give brianilest
Which of the following are examples of energy sources
A. Water dam
B. Coal- fired generator
C. Solar panel array
D. Nuclear power reactor
E. Sea salt
F Gasoline
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If i do you will be reported
Answer: A. Water dam
B. Coal- fired generator
C. Solar panel array
D. Nuclear power reactor
F. Gasoline
Explanation:
Water dam is a source of hydroelectrical energy as the energy produced by the high speed water currents can be used to generate electrical energy.
Coal fired generator is a source thermal energy.
Solar panel array converts the heat energy from the sun into electrical energy.
Nuclear power reactor converts the thermal energy from the radiations generated after the fusion and fission reactions of the heavy atoms in a nuclear reactor. The thermal energy is converted into electrical energy.
Gasoline is a source of thermal energy which is used to run the machine or vehicle. This way thermal energy is converted into mechanical energy.
Nonverbal communication has over ____ more impact on the message received than the actual words spoken. (1 point) A. 90% B. 50% C. None of the answer choices are correct D. 27%
Answer:
Option A, 90%
Explanation:
As per studies, Nonverbal communication impact is around 80-90% . It is so because, face to face communication strategies or Nonverbal communication involve study of following along with the words spoken by an individual while communicating with others -
Facial expressions
Eye contact
Body language
Tone of voice
Hence, option A is correct
what happens when you break a school chromebook
Answer:
You get sent to the office an yo parents gon pay for the chromebook out of your allowance. Then you gon get whipped for breaking it in the first place.
XD
Explanation:
Reduce the force F ij = + (2 5 ) kN to point A(2m,3m) that acts on point B( 3m,5m) - .
Given :
Force, [tex]\vec{F}= (2\hat{i} + 5\hat{j})\ kN[/tex].
Force is acting at point A( 2 m, 3 m ) and B( 3 m, 5 m )
To Find :
The work done by force F .
Solution :
Displacement vector between point A and B is :
[tex]\vec{d} = (3-2)\hat{i} + (5-3)\hat{j}\\\\\vec{d} = \hat{i} + 2\hat{j}[/tex]
Now, we know work done is given by :
[tex]W = \vec{F}.\vec{d}\\\\W= (2\hat{i} + 5\hat{j}).(\hat{i}+\hat{2j})\\\\W = (2\times 1) +( 5\times 2) \ kJ\\\\W = 12 \ kJ[/tex]
W = 12000 J
Therefore, work done by force is 12000 J .
How do the remains of plants and animals become fossil fuels. Why are they considered nonrenewable resources?
Answer:
they become oils with heat and pressure
they are non-renewable because they take millions of years to form
write a paragraph on how iron and copper(separately) is manufactured, what it consists of and processes that it went through to be usable in its current form
Answer:
Iron is manufactured in a blast furnace. First, iron ore is mixed with coke and heated to form an iron-rich clinker called 'sinter'. Sintering is an important part of the overall process as it reduces waste and provides an efficient raw material for iron making. Coke is produced from carefully selected grades of coal.
Copper is typically extracted from oxide and sulfide ores that contain between 0.5 and 2.0% copper. ... Regardless of the ore type, mined copper ore must first be concentrated to remove gangue or unwanted materials embedded in the ore. The first step in this process is crushing and powdering ore in a ball or rod mill.
Which of the following requirement statements is an example of a breakdown of the accuracy standard?
The automobile rental prices shall show all taxes (including a 6% state tax).
The list of available flights shall include all flight numbers and departure times.
All information regarding incoming flights shall be stored in a text file.
The system shall have a natural language that interprets all English commands.
Answer:
The automobile rental prices shall show all taxes (including a 6% state tax).
Explanation:
Im pretty sure
\o you sell them?” "Fivepence farthing for one—Twopence for two,” the Sheep replied. "Then two are cheaper than one?” Alice said in a surprised tone, taking out her purse. "Only you MUST eat them both, if you buy two,” said the Sheep. "Then I'll have ONE, please,” said Alice, as she put the money down on the counter. For she thought to herself, "They mightn't be at all nice, you know.” The Sheep took the money, and put it away in a box: then she said "I never put things into people's hands—that would never do—you must get it for yourself.” And so saying, she went off to the other end of the shop, and set the egg upright on a shelf. "I wonder WHY it wouldn't do?” thought Alice, as she groped her way among the tables and chairs, for the shop was very dark towards the end. "The egg seems to get further away the more I walk towards it. Let me see, is this a chair? Why, it's got branches, I declare! How very odd to find trees growing here! And actually here's a little brook! Well, this is the very queerest shop I ever saw!” The tone of this passage is best described as unusual and strange. logical and orderly. realistic and ordinary. negative and critical.
Answer:
unusual and strange
Explanation:
Please help I am give brainiliest
1. How is energy made available to you at your house
A. Original energy source is converted to AC power, then transported through conductors to your house.
B. Original energy source is converted to DC power, then transported through conductors to your house.
C. Original energy source is converted to AC power, then transmitted wirelessly to you house.
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If i you will be reported
Answer:
A. Original energy source is converted to AC power, then transported through conductors to your house.
Explanation:
The correct option is - A. Original energy source is converted to AC power, then transported through conductors to your house.
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How can adding electricity to possible solutions of a problem help generate better outcomes?
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If i do you will be reported
Answer:
Explanation:
It will help because we can unlock new potential with electric and can help us with things we can’t do
Please help i am give brainliest
what form of energy is available from an electrical wall outlet
A. AC power
B. DC power
I don't want to see any link
If i do you will be reported
Answer:
A C power is the answer
hope this helps
the device in the above photo is used to check the coolant
A. Level
B. Acid level
C. Thickness
D. Temperature
I've found the answer and did the pf test. its B
state four reasons why public participation is important in ensuring sustainable provision of services to the community
In this exercise we have to analyze the four reasons for public participation in the court is:
promote transparency, encourage openness in government build ownership of development decisions as well as programmes and projects. What makes up a Court?
The Jury Court is composed of a presiding judge and twenty-five jurors, of which seven will be drawn to compose the sentencing council and who will have the task of affirming or denying the existence of the criminal act attributed to a person. Jurors decide on the matter of fact and whether the accused should be acquitted.
It is a way of promoting knowledge of society in a court and demonstrating that it is a correct court of indifferent.
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Match the tool to the simple machine.
exit ramp
crane
Wheelbarrow
nutcracker
ice pick
elevator
Pulley
Second-class Lever
Wedge
Inclined Plane
Engineering uses scientific thinking to solve real-world problems.
True
False
100 POINTS! do sweedish people have yogurt do u think they have had yogurt and chimichangas do they have those
Answer:
yes, they have yogurt. i dont know anything about them having chimichangas.
Explanation:
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How can adding electricity to possible solutions of a problem help generate better outcomes?
i don't want to see any link
If i do you will be reported
Answer:
I hot u
Explanation:
it makes things function better and more fluently than a manual version of the certain object
Answer:
l m a o
Explanationl