Answer:
The range of true mean value is "[tex]6.92 \pm 1.11142[/tex]".
Explanation:
The given values are:
Number of bricks,
n = 15
Variance,
σ² = 6.89 MN/m²
Mean,
[tex]\bar{x} = 6.92 \ MN/m^2[/tex]
90% confidence level,
z = 1.64
Now,
The margin of error will be:
= [tex]z\sqrt{\frac{\sigma^2}{n} }[/tex]
On substituting the given values, we get
= [tex]1.64\sqrt{\frac{6.89}{15} }[/tex]
= [tex]1.64\times 0.6777[/tex]
= [tex]1.11142[/tex]
So,
Range of true mean value will be:
= [tex]Mean \pm Margin \ of \ error[/tex]
= [tex]6.92 \pm 1.11142[/tex]
The settlement analysis for a proposed structure indicates that the underlying clay layer will settle 7.5 cm in 3 years, and that ultimately the total settlement will be about 32 cm. However, this analysis is based on the clay layer being doubly drained. It is suspected that there may be no drainage at the bottom of the layer (i.e., clay has single drainage condition). Answer the following questions based on single drainage only, assuming cv = 1.5 x 10-4 cm 2 /s for both single and double drainage.
a. How will the total settlement change from the double to the single drainage case?
b. How long will it take for 7.5 cm of settlement to occur if there is only single
Answer:
A) For a double drainage system the time taken for total settlement will differ from that of a single drainage system, because in a double drainage case clay water escapes from both sides unlike in a single drainage case. hence water and air will be be expulsed faster for a double drainage making it attain total settlement faster.
B) for only single = 12 years
Explanation:
Given data :
ultimate clay settlement = 32 cm
settlement of clay in 3 years = 7.5 cm
Cv ( coefficient of consolidation ) = 1.5 x 10^-4 cm^2 /s
A) For a double drainage system the time taken for total settlement will differ from that of a single drainage system, because in a double drainage case clay water escapes from both sides unlike in a single drainage case. hence water and air will be be expulsed faster for a double drainage making it attain total settlement faster.
note : Total settlement is the same in both drainage system.
B) Determine how long it will take for 7.5 cm of settlement to occur if there is only single
applying the relation below
Tv = Cv t / H^2
where Tv = time factor , d = thickness of layer , H = drainage path
Given that Tv and Cv are constant in both cases
t ∝ H^2 hence
[tex]\frac{t1}{t2} = \frac{H^21}{H^22}[/tex] ------ ( 1 )
t1 = time for single drainage for d meters , t2 = time for double drainage for d meters
equation 1 can be rewritten as
t1/t2 = d^2 / (d/2)^2
∴ t1 = 4t2
given that t2 = 3 years ( value gotten from question )
t1 = 4 * 3 = 12 years
Please help ASAP!! I’m taking the test right now!!!
Ronny wants to produce a metal sheet through which a shaft can pass. Which process will he use?
A) grinding
B) reaming
C) turning
D) milling
E) chipping
Answer:
B) reaming | yes it is B) reaming
13
Select the correct answer.
What is it called when you have another person with you for safety?
ОА. .
Friend
ОВ.
Buddy System
OC. Shadow System
OD. Chaperone
Reset
Next
Answer:
Chaperone
and what's reset and next for?
Answer:
That would be a chaperone.
How to measure the quality of the output signal in ADC?
A. Signal-to-noise ratio
B. Quantization error
C. Signal-to-quantization-noise ratio
D. Bit error rate
Answer:
C. Signal-to-quantization-noise ratio
Explanation:
The basic dc-dc converter of Fig. 6-2a has a source of 100 V and a load resistance of 10 ⦠The duty ratio of the switch is D = 0.6, and the switching frequency is 1 kHz. Determine (a) the average voltage across the load, (b) the rms voltage across the load, and (c) the average power absorbed by the load. (d) What would happen if the switching frequency were increased to 2 kHz?
Answer:
a. 60V
b. 77.46V
c. 600 W
d. there would be no effect when this is done
Explanation:
a.
to get value of average output
Vo = VsD
Vs = 100V
D = 0.6
Vo = 100 V * 0.6
Vo = 60V
Therefore 60V is the value of average voltage
b.
The rms voltage:
= Vs√D
= 100 x √0.6
= 100 x 0.7746
= 77.46V
the rms voltage is Therefore 77.46V
c.
value of average power:
= (RMS)²/R
R = 10
when we put into formula above,
= (77.46)²/10
= 6000.05/10
= 600.005 W
= 600W
d.
If switching frequency is changes to be 2khz it would actually have no effect on the average voltage, average power or rms voltage.
Recourses needs to provide goods or services are called?
Answer:
Resources needed to provide goods or services are called factors of production
Explanation:
Further Explanation:
Factors of reproduction
Factors of reproduction are inputs or resources that are used in the generation of goods and services with an aim of making profit.
There are four main factors of production which include;
Land
Labor
Capital
Entrepreneurship
Land
This refers to all the natural resources that are available to be used in the production of goods.
These natural resources includes raw materials from the ground, non-renewable resources such as petroleum and renewable resources such as timber.
The income or reward earned from land as a factor of production is rent.
Labor
This refers to the manpower or work done by human beings.
The value of labor depends on the skills, education and motivation of workers.
The reward for labor as a factor of production is wages and salaries.
Capital
This refers to the capital goods, that is, man-made objects that are used for production of goods and services such as machinery, equipment and chemicals.
They also include industries and commercial buildings.
The reward or income earned from capital goods is interest
Entrepreneurship
It involves coming up with an idea and developing it into profitable business.
An entrepreneur is therefore an individual who combines the other factors of production to build a business and add the supply in the economy.
The reward or income earned by entrepreneurs is profit.
Keywords: Factors of production, labor, land, capital
Learn more about
Factors of reproduction: brainly.com/question/4335697
Reward for factors of reproduction: brainly.com/question/3884238
Capital goods: brainly.com/question/11672036
Consumer goods: brainly.com/question/3227054
Level: High school
Subject: Business
Topic: Factors of reproduction
once you get the answer correct first i will mark you brainliest!!
Answer:
2
Explanation:
2. Why is pitch important to passenger comfort?
Hallucinogens, or psychedelics, are drugs that alter the senses.
True
False
Answer:
True
Explanation:
a example of a psychedelic drug is acid
The in-situ dry density of a sand is 1.72Mg/m3. The maximum and minimum drydensities, determined by standard laboratory tests, are 1.81 and 1.54 Mg/m3,respectively. Determine the relative density of the sand and soil description based on its density.
Answer:
Relative density = 0.7 or 70%
Explanation:
The following information was provided by this question
Pd = 1.72mg/mg³
Pd max = 1.81 mg/mg³
Pd min = 1.54 mg/mg³
We substitute into the formula. This formula is contained in the attachment.
[(1/1.54)-(1/1.72)]/[1/1.54 - 1/1.81]
= 0.649350 - 0.581395 / 0.649350 - 0.552486
= 0.067955/0.096864
= 0.7015
= 0.7
The relative density is Therefore 0.7 or 70% when converted to percentage
Outline the process used to test the following hypothesis: Titanium cages are stronger than steel cages for hockey goalie masks.
Answer:
true
Explanation:
A___ remote control can be an advantage to an
operator who is welding close to the power source.
•wireless
•corded
•cable technology
•none of these
Answer:
Wireless
Explanation:
A wireless remote control can be an advantage to an operator who is welding close to the power source. Hence, option A is correct.
What is wireless remote control?An electrical device used to wirelessly and remotely operate another device is a remote control, often known as a remote or clicker. Consumer gadgets, such as television sets, DVD players, and other home appliances, can be controlled by a remote control.
In the current electronic market, remote control systems fall into three primary categories: IR-based systems, RD-based systems, and BT-based systems. the receiver and the remote must be lined up exactly for infrared, also known as IR.
IR, on the other hand, is unable to pass through a number of materials but can operate over a much wider spectrum. This allows the user far greater freedom and control in environments with challenging terrain and obstacles.
Thus, option A is correct.
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design process 8 steps with definition
Answer:
Step 1: Define the Problem.
Step 2: Do Background Research. .
Step 3: Specify Requirements. .
Step 4: Brainstorm, Evaluate and Choose Solution.
Step 5: Develop and Prototype Solution.
Step 6: Test Solution.
Step 7: Does Your Solution Meet the Requirements?
Step 8: Communicate Results.
can u tell me the definition tho?
palled correctly as “though” which is an alternate form of “although”) at the end is informal usage. It's better placed before “she seems better today
Can we live without software?
No, because you are using it right now.
Yes, because software is not the most improtant thing in our life.
Which statement about the seal between the respirator and the wearer's face is true?
POSSIBLE ANSWERS:
Negative pressure respirators prevent ambient air from entering the mask.
Cosmetic surgery can be completed without a re-evaluation of respirator fit.
Positive pressure respirators tighten the face mask when the wearer inhales.
Facial hair can prevent a respirator from properly sealing to the wearer’s face.
A true statement about the seal between the respirator and the wearer's face is: D. facial hair can prevent a respirator from properly sealing to the wearer’s face.
What is a respirator?A respirator can be defined as a personal protective equipment that is typically worn over the face to protect the mouth and nose, while protecting the wearer from inhaling smoke, dust, or other toxic chemical substances.
In this context, a true statement about the seal between the respirator and the wearer's face is that facial hair has the ability to prevent a respirator from properly sealing to the wearer’s face.
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Design a column to support a factored axial load of 1950kN. The column has an effective length of 6m
with respect to y-axis and 4m with respect to x-axis?
Answer: eccentricity of loading with respect to the centroid. - Member out-of ... columns. Figure 1. Buckling of axially loaded compression members. • The critical ... Effective length for minor (y) axis buckling = Ky Ly = 1.0 x 20 = 20 ft. = 240 in. Step III. ... Column AB has a design factor load Pu = 450 kips
Explanation:
3. Mr. Britt is pouring a 36' x 58' concrete pad for a metal building. If concrete costs
$123.00 per cubic yard, what will be the cost of the concrete to pour the pad 8 inches
thick? A cubic yard of concrete = 27 cubic feet and Cu.Ft. = T'x W' x L' (Round up
to the nearest cubic yard when calculating concrete needed.)
a. $5,047.00
b. $6,396.00
c. $6,564.00
d. $7,329.00
Answer:
Option A
Explanation:
The size (volume) of the concrete pad is
[tex]36 * 38 * \frac{8}{12} \\912[/tex]cubic feet or 33.77 cubic yard
Cost of concrete per cubic yard [tex]= 123[/tex] dollars
Cost of concrete used in concrete pad is
[tex]33.77 * 123 \\4153[/tex]dollar
The nearest answer to this question is option A
In manufacturing a particular set of motor shafts, only shaft diameters of between 38.20 and 37.50 mm are usable. If the process mean is found to be 37.80 mm with a standard deviation of 0.20 mm, what percentage of the population of manufactured shafts are usable?
Answer:
we can conclude that 91.04% population of shafts are usable
Explanation:
Given that;
X[tex]_{min}[/tex] = 37.50 mm
X[tex]_{max}[/tex] = 38.20 mm
mean μ = 37.80
standard deviation σ = 0.20 mm
This problem is based on normal probability distribution so, to get the probability, we must calculate; z = x-μ / σ
so;
Z[tex]_{min}[/tex] = (X[tex]_{min}[/tex] - μ) / μ = (37.50 - 37.80) / 0.20 = -1.5
Z[tex]_{max}[/tex] = (X[tex]_{max}[/tex] - μ) / μ = (38.20 - 37.80) / 0.20 = 2
Hence;
P( 37.50 < X < 38.20 ) = P( -1.5 < Z < 2 )
P( 37.50 < X < 38.20 ) = P( 0 < Z < 1.5 ) + P( 0 < Z < 2 )
from the standard normal table table;
P( 37.50 < X < 38.20 ) = 0.4332 + 0.4772
P( 37.50 < X < 38.20 ) = 0.9104 = 91.40%
Hence, we can conclude that 91.04% population of shafts are usable
Define the term 'Computer
Answer:
An electronic devices for storing and processing data, typically and binary form according to the instructions given.
Computer's “brain” is the (CPU), often known as the processor. When your computer runs programs or applications, the CPU handles all the complex algorithms and programming.
What best define about term Computer?A computer is a device that processes data that has been digitally altered in accordance with a set of guidelines laid out in a program, piece of software, or set of instructions.
In businesses, computers are typically used to run projects, check inventory levels, manage and maintain accounts and personal data, and generate presentations. In addition, computers are more accurate and speedier than people, making them better suited for transaction processing.
Therefore, An electronic device that stores and processes data, typically in binary form and in accordance with commands.
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In which model of the system, the change in order is generated depending on the system activities. *
Static Model
Dynamic Model
Analytical Model
Numerical Model
Answer:
Static Model
Explanation:
Explain why the scenario below describes a team of mechanical engineers.
Situation: A team of engineers designs and maintains an air conditioning system for a high-rise office building in Boston, Massachusetts.
Explanation:
because mechanical engineers fix air conditioners cars and other stuffs
Answer:
because mechanical engineers fix air conditioners cars and other stuffs
Explanation:
Recommend the types of engineers needed to collaborate on a city project to build a skateboard park near protected wetlands.
Answer:
A civil engineer.
Explanation:
Civil engineering is the science that deals with the design, creation and maintenance of constructions for civil use on the earth's surface. Thus, this specialty seeks to adapt soils to the needs of life in society, creating buildings, bridges, and all other constructions adapted to civil life, while taking care of the correct use of soils and the correct distribution of spaces and resources. to be used for such constructions.
Outline the course of study Brent might follow in high school if he is interested in earning an engineering degree in college.
Answer:
Science, Technology, Engineering and Mathematics courses
Explanation:
The background and foundational prerequisite and knowledge required to traverse through college education is being acquired at high school. Most of the what is going to be needed based on one's aspiring career or course of choice would have been introduced to students. This is why it is important to prepare ahead in other to keep focus.
For the pursuit of an engineering degree in college, this falls under the Science, Technology, Engineering and Mathematics curriculum. Hence, courses relating to science, technology and engineering and mathematics curriculum.
Select three types of variables scientists use in experiments.
control
dependent
evaluative
functional
independent
analytical
Answer:
dependent functional analytical
Explanation:
What type of system is used by a steam engine?
A steam engine uses fuel to heat water into steam which drives a turbine, thus converting heat into mechanical energy. The steam engine is a type of ______
system.
Answer:
Steampunk Mechanical
Explanation:
Your welcome
The first order, reversible reaction A<--> B + 2C is taking place in the membrane reactor. Pure A enters and B diffuses through the reactor. Unfortunately, some of the reactant A also diffuses through the membrane.
A. Plot and analyze the flow rates of A, B and C down the reactor, as well as the flow rates of A and B through the membrane.
B. Compare the conversion profiles of a conventional PFR with those of a membrane reactor. What generalizations can you make?
C. Would the conversion of A be greater or smaller if C were diffusing instead of B?
D. Discuss qualitatively how your curves would change if the temperature were increased significantly or decreased significantly for an exothermic reaction. Repeat for an endothermic reaction.
Additional Info:
k= 10min-1
KC=0.01mol2/dm6
kCA=1min-1
kCB=40min-1
FA0=100mol/min
v0 = 100dm3/min
VReactor=20dm3
Please note that this problem only needs you to set up the system of equations, supporting equations, parameters and B.C's for ODE or equivalent solver.
Select the correct answer.
Which statement is true regarding the use of Kirchhoff’s laws?
A.
The voltage change across a resistor is negative when you traverse in the opposite direction of the current.
B.
Some current is lost at the junction due to resistance across all resistors in the circuit.
C.
Every loop should contain junctions from where current branches out in different directions.
D.
The voltage change across a resistor is zero when you traverse in the opposite direction of the current.
E.
The sum of currents flowing into a junction is more than the sum flowing out of it.
Answer:
A.
Explanation:
The voltage change across a resistor is negative when you traverse in the opposite direction of the current.
Into which of the six kingdoms should the organism be placed? Construct a response to state your claim, use evidence, and support with reasoning. Include the list of common characteristics of the kingdom and why it does not belong in the other kingdoms in your justification.
Answer: The organism is an amoeba belonging to the protist kingdom.
Explanation: The organism cannot be placed in the plantae kingdom because the organism does not contain a cell wall or chloroplasts. The organism also cannot be bacteria or Archaebacteria because it has a nucleus. The organism cannot belong to the fungi or animalia kingdom because it contains psedupodium.
How do performance expectation change over time for a technology?
Answer:
The digitization of performance management not only provides more precise data but also positively influences management processes and strategic development. Technology-enabled performance management tools simplify the manager's evaluation process and turn employees into active participants in their review sessions
The benzoyl peroxide initiated polymerization of a monomer follows the simplest kinetic scheme, that is, Rp = kp[M]( f kd[I]/kt ) 1/2 with all rate constants and f being independent of conversion. For a polymerization system with [M]O = 2 M and [I]O = 10-2 molar, the limiting conversion p∞ is 10%. To increase p∞ to 20%: