consider the two different heuristics shown in the table above, for the graph used in the previous questions (shown above as well). answer the following true/false statements - just type t for true and f for false. 'h1' is admissible 'h1' is consistent 'h2' is admissible 'h2' is consistent 'h1' is better (dominating) than 'h2'
Answers
'h1' is admissible 'h1' is consistent 'h2' is admissible 'h2' is consistent 'h1' is better (dominating) than 'h2' is True
What is Heuristics?Any approach to problem solving or self-discovery that uses a practical method that is not assured to be ideal, perfect, or rational but is nevertheless adequate for achieving an immediate, short-term goal or approximation is known as a heuristic or heuristic methodology. Heuristic methods can be used to expedite the process of obtaining a workable solution in situations when it is impossible or impractical to discover an ideal one. Heuristics are thought of being mental'shortcuts' that lessen the cognitive strain of decision-making.Heuristic examples include trial and error, applying a rule of thumb, or making an educated assumption.Heuristics are tactics that have been developed from prior encounters with challenges that are comparable. However, it can also result in systematic errors.
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Related Questions
Just after the circuit is completed, at what rate is the battery supplying electrical energy to the circuit?.
Answers
The battery is supplying electrical energy to the circuit at a constant rate, which is determined by its voltage and internal resistance.
The circuit is completed, the battery starts to release its stored energy in the form of electrical current, which flows through the wires and components of the circuit. The rate at which this energy is released depends on the resistance of the circuit, which determines how much current can flow at a given voltage.
If the resistance of the circuit is low, then the battery will supply a high current and therefore a high rate of energy output. Conversely, if the resistance is high, then the battery will supply a low current and a low rate of energy output.
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in the lab, you installed the __________ feature on a remote domain controller.
Answers
In the lab, we installed the Remote Server Administration Tools (RSAT) feature on a remote domain controller.
RSAT is a set of tools that enable administrators to remotely manage Windows Server roles and features from a Windows 10 computer. By installing RSAT on the remote domain controller, we were able to access and manage the Active Directory Domain Services (AD DS) role from our Windows 10 computer without needing to physically be at the server. This allowed us to perform tasks such as creating new user accounts, managing group policies, and monitoring the health of the domain controller from a remote location.
One of the key benefits of using RSAT is that it reduces the amount of time and effort required to manage Windows Server roles and features. Administrators can easily perform routine maintenance and management tasks without having to physically access the server, which can be particularly useful in larger organizations with multiple domain controllers spread across different locations.
Overall, installing the RSAT feature on a remote domain controller enables administrators to more efficiently manage their Windows Server environment from a centralized location, improving productivity and reducing downtime.
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which zones should you search when approaching an intersection?
Answers
You should search the zones to the left and right of your vehicle, as well as any areas directly in front of the intersection, such as crosswalks, bike lanes, and medians. Additionally, you should be aware of any oncoming traffic or pedestrians who may be crossing the intersection.
When approaching an intersection, it is important to pay attention to all of the potential hazards around you. First, you should search the zones to the left and right of your vehicle. This includes looking for oncoming traffic, pedestrians, or cyclists who may be crossing the intersection or entering the roadway. Additionally, you should be aware of any obstacles that may be directly in front of you, such as crosswalks, bicycle lanes, or medians. By taking the time to search all of these zones and be aware of your surroundings, you can increase your safety and the safety of others.
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Y'''=12compute the y function by using differantial equations
Answers
Given the differential equation Y''' = 12We have to compute the y function by using differential equations.Using the third order differential equation
we can write three first order differential equations as follows;Let Y1
= Y, Y2
= Y' and Y3
= Y''Y1' = Y'
= Y2Y2'
= Y''
= Y3Y3'
= Y''' = 12Y1'
= Y2Y2'
= Y3Y3'
= 12 Integrating the third equation with respect to x, we get;Y3
= ∫12 dx
= 12x + C1Where C1 is a constant of integration.Differentiating with respect to x, we get;Y2
= Y'
= dY/dx
= d(Y1)/dx
= Y1'
= Y2
= dy/dxY1'
= Y2
= Y'
= dy/dxAgain differentiating with respect to x, we get;Y3
= Y''
= d²Y/dx²
= d(Y2)/dx
= d²(Y1)/dx²
= Y1''
= Y3
= d²y/dx²Y1'
= Y2
= dy/dxY2'
= Y3
= d²y/dx²Using the first two equations, we can obtain a second-order differential equation as follows;Y2'
= Y3Y1'
= Y2Y2'
= Y3Substituting the values of Y2' and Y3 in the above equation, we get;Y1'
= Y2dY2/dx
= 12d²y/dx²Simplifying the above equation, we get;d²y/dx²
= (1/12)d(Y')/dxIntegrating the above equation with respect to x, we get;dY/dx
= (1/12) d(Y')/dx + C2Where C2 is a constant of integration.Again integrating the above equation with respect to x, we get;Y = (1/12) d(Y')/dx x² + C2x + C3Where C3 is a constant of integration. Hence, the solution to the differential equation Y'''
= 12 is given by;Y
= (1/24)x² + C1x² + C2x + C3Where C1, C2, C3 are constants of integration.
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Searches related to Probability questions - A person frequents one of the two restaurants KARIM or NAZEER, choosing Chicken's item 70% of the time and fish's item 30% of the time. Regardless of where he goes , he orders Afghani Chicken 60% of his visits. (a) The next time he goes into a restaurants, what is the probability that he goes to KARIM and orders Afghani Chicken. (b) Are the two events in part a independent? Explain. (c) If he goes into a restaurants and orders Afghani Chicken, what is the probability that he is at NAZEER. (d) What is the probability that he goes to KARIM or orders Afghani Chicken or both?
Answers
Answer:
a) 0.42
b) Independent
c) 30%
d) 0.88
Explanation:
Person chooses Chicken's item : 70% = 0.7
Person chooses fish's item : 30% = 0.3
Visits in which he orders Afghani Chicken = 60% = 0.6
a) Probability that he goes to KARIM and orders Afghani Chicken:
P = 0.7 * 0.6 = 0.42
b) Two events are said to be independent when occurrence of one event does not affect the probability of the other event's occurrence. Here the person orders Afghani Chicken regardless of where he visits so the events are independent.
c) P = 0.30 because he orders Afghani Chicken regardless of where he visits.
d) Let A be the probability that he goes to KARIM:
P(A) = 0.7 * ( 1 - 0.6 ) = 0.28
Let A be the probability that he orders Afghani Chicken:
P(B) = 0.3 * 0.6 = 0.18
Let C be the probability that he goes to KARIM and orders Afghani chicken:
= 0.7 * 0.6 = 0.42
So probability that he goes to KARIM or orders Afghani Chicken or both:
P(A) + P(B) + P(C) = 0.28 + 0.18 + 0.42 = 0.88
When did Brainly come out and who was the first person on there besides the makers?
Please don’t give me lame answers or they will get reported
Thank you! :)
Answers
Answer:
i have actually been wondering this also. its a really great tool to have
Explanation:
Answer:
BRAINLY EXPERT✓
Explanation:
Initially called Zidane. pl, the company was founded in 2009 in Poland by Michał Borkowski (currently chief executive officer), Tomasz Kraus, and Łukasz Haluch. The first million unique monthly users were achieved within 6 months after the release.[5]
In January 2011, the company founded Znanija.com, the first international project dedicated to Russian language speakers.[6] Several other versions in multiple languages for the following markets included Turkey (eodev.com), Latin America and Spain (brain. lat), and Brazil (brainly.com.br).
with the aid of a diagram and examples explain the five components that are considered in an electric circuit
Answers
Answer:
Five components considered in an electric circuit is a battery, resistor, capacitor, light bulb, and switch.
You are building a system around a processor with in-order execution that runs at 1.1 GHz and has a CPI of 1.35 excluding memory accesses. The only instructions that read or write data from memory are loads (20% of all instructions) and stores (10% of all instructions). The memory system for this computer is composed of a split L1 cache that imposes no penalty on hits. Both the Icache and D-cache are direct-mapped and hold 32 KB each. The l-cache has a 2% miss rate and 32-byte blocks, and the D-cache is write-through with a 5% miss rate and 16-byte blocks. There is a write buffer on the D-cache that eliminates stalls for 95% of all writes. The 512 KB write-back, the unified L2 cache has 64-byte blocks and an access time of 15 ns. It is connected to the L1 cache by a 128-bit data bus that runs at 266 MHz and can transfer one 128-bit word per bus cycle. Of all memory references sent to the L2 cache in this system, 80% are satisfied without going to the main memory. Also, 50% of all blocks replaced are dirty. The 128-bit-wide main memory has an access latency of 60 ns, after which any number of bus words may be transferred at the rate of one per cycle on the 128-bit-wide 133 MHz main memory bus. a. [10] What is the average memory access time for instruction accesses? b. [10] What is the average memory access time for data reads? c. [10] What is the average memory access time for data writes? d. [10] What is the overall CPI, including memory accesses?
Answers
To calculate the average memory access time for instruction accesses (a), data reads (b), data writes (c), and the overall CPI including memory accesses (d), we need to consider the cache hierarchy and memory system parameters given.
a. Average Memory Access Time for Instruction Accesses:
The instruction cache (I-cache) is direct-mapped with a 2% miss rate and 32-byte blocks. The I-cache imposes no penalty on hits.
Average memory access time for instruction accesses = Hit time + Miss rate * Miss penalty
Given:
Hit time = 0 (no penalty on hits)
Miss rate = 2% = 0.02
Miss penalty = Access time of L2 cache = 15 ns
Average memory access time for instruction accesses = 0 + 0.02 * 15 ns = 0.3 ns
b. Average Memory Access Time for Data Reads:
The data cache (D-cache) is direct-mapped with a 5% miss rate and 16-byte blocks. The D-cache is write-through, but there is a write buffer that eliminates stalls for 95% of all writes.
Average memory access time for data reads = Hit time + Miss rate * Miss penalty
Given:
Hit time = 0 (no penalty on hits)
Miss rate = 5% = 0.05
Miss penalty = Access time of L2 cache = 15 ns
Average memory access time for data reads = 0 + 0.05 * 15 ns = 0.75 ns
c. Average Memory Access Time for Data Writes:
For data writes, there is a write buffer on the D-cache that eliminates stalls for 95% of all writes. The write buffer avoids the need to access the L2 cache for most writes.
Average memory access time for data writes = Hit time + (1 - Write buffer hit rate) * Miss penalty
Given:
Hit time = 0 (no penalty on hits)
Write buffer hit rate = 95% = 0.95
Miss penalty = Access time of L2 cache = 15 ns
Average memory access time for data writes = 0 + (1 - 0.95) * 15 ns = 0.75 ns
d. Overall CPI including Memory Accesses:
To calculate the overall CPI including memory accesses, we need to consider the fraction of memory references that cause cache misses and access the main memory.
Overall CPI = CPI (excluding memory accesses) + (Memory access time / Clock cycle time)
Given:
CPI (excluding memory accesses) = 1.35
Memory access time = Average memory access time for instruction accesses + (Memory references causing cache misses * Average memory access time for data reads) + (Memory references causing cache misses * Average memory access time for data writes)
Clock cycle time = 1 / (Processor frequency)
Memory references causing cache misses = Instruction references * Instruction miss rate + Data references * Data miss rate
Instruction references = 20% of all instructions
Data references = 10% of all instructions
Calculating the values:
Memory references causing cache misses = (20% * 0.02) + (10% * 0.05) = 0.006
Memory access time = 0.3 ns + (0.006 * 0.75 ns) + (0.006 * 0.75 ns) = 0.3045 ns
Clock cycle time = 1 / (1.1 GHz) = 0.909 ns
Overall CPI including Memory Accesses = 1.35 + (0.3045 ns / 0.909 ns) = 1.35 + 0.335 = 1.685
Therefore:
a. Average memory access time
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Suggest suitable materials of construction for the following applications and provide justifications.
a) A 10,000 m' storage tank for toluene.
b) A 5.0 m' tank for storing a 30% w/w aqueous solution of sodium chloride.
c) A 2 m diameter, 20 m high distillation column, distilling acrylonitrile.
d) A 100 m storage tank for strong nitric acid.
e) A 500 m3 aqueous waste hold-up tank. The wastewater pH can vary from 1 to 12. The wastewater will also contain traces of organic material.
f) A packed absorption column 0.5 m diameter, 3 m high, absorbing gaseous hydrochloric acid into water. The column will operate at essentially atmospheric pressure.
Answers
Answer:
a) 316 stainless steel
b) 316 stainless steel
c) Carbon steel
d) stainless steel 316
e) stainless steel 316
f ) Carbon steel
Explanation:
A) A 10,000 M' storage tank for Toluene
The best material for building this tank is 316 stainless steel this is because it is relatively cheaper than other materials such as Hest Alloy C while still maintaining the required tensile strength needed to build the storage tank for Toluene
B) A 5.0 m' tank for storing a 30% w/w aqueous solution of sodium chloride
The suitable material for building this tank is 316 stainless steel as it is cheaper than Titanium and Hest Alloy C and it is compatible with sodium chloride
C) A 2 m diameter, 20 m high distillation column, distilling acrylonitrile
The best material for constructing this column is Carbon steel and this is because it has a very high compressive strength which is approximately . 1320 MPa
D) A 100 m storage tank for strong nitric acid.
The best material is stainless steel 316 and this is due to its high tensile strength
E) 316 stainless steel
F) Carbon steel is suitable for building this absorption column because it has a very high compressive strength which is approximately . 1320 MPa
How does concurrent engineering speed up product development?
A. The product and process are designed using computer-aided design.
B. The product and process are designed in series.
C. The product and process are designed in separate spaces.
D. The product and process are designed simultaneously.
Answers
Answer:
The product and process are designed simultaneously
Explanation:
PENN
Please help me with the question in the picture
Answers
The IP address of host 2 on subnet 6 would be the second address in the subnet, which is: 227.12.1.41
How to get the informationIt should be noted that to discover the IP address of Host 2 on Subnet 6, first we must uncover the network address of the sixth subnet. Since the number is 6, the network address bears the designation of the sixth subnet belonging to a Class C Network 227.12.1.0.
In order to ascertain the network adress of Subnet 6, one must become familiar with the block size. By examining the subnet mask /29, it can be deduced that the block size's magnitude must be equal to 2^(32-29)= 8. Summarily, the network address of Subnet 6 would correspond as:
227.12.1.0 + (6-1) * 8 = 227.12.1.40
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what is the distance in term of wavelengh between successive minima in the standing wave ratio
Answers
Answer:
hi there
Explanation:
Transmission lines that join two Balancing Authority Areas are known as
Answers
What is the formula for Measurement System Subject.
Answers
Answer:
You can see there are four different types of measurement scales (nominal, ordinal, interval and ratio).
Some Important Formulas:
Area of the rectangle, A = L \times B.Area of the square, A =Side ^2.Perimeter of a rectangle, P = 2 \times ( L+B )Perimeter of square, P = 4 \times Side.Area of the triangle, A = \frac{1}{2} \times Base \times Height.Circumference of a Circle, C = 2 \times \pi \times r.Hope this helps!
Don't forget to mark me as Brainliest.
We are capable of building computers that exhibit human-level intelligence. Are there certain areas of application where we should push to accelerate the building of such computers? Why these application areas? Are there certain areas of application we should avoid? Why these application areas?
Answers
The idea of creating computers with human-level intelligence has been a topic of discussion for a long time.
While it's an exciting prospect, it's also important to consider the areas where we should push to accelerate the building of such computers.
One area where we should focus on accelerating the building of such computers is the medical field. With the help of these computers, doctors can diagnose diseases more accurately and efficiently, and even predict future health issues. Additionally, these computers can analyze medical data faster, which could lead to the development of new drugs and treatments.
Another area where we can push for the development of human-level intelligent computers is the field of engineering. These computers can simulate complex structures and designs, leading to the creation of better and more efficient machines.
However, there are also certain areas where we should avoid building such computers. For example, creating autonomous weapons or robots with human-level intelligence can have disastrous consequences. Such weapons or robots could make decisions that could harm humans, which is not something we should take lightly.
In conclusion, while the development of computers with human-level intelligence is an exciting prospect, it's important to focus on the areas where they can be used to improve human lives. At the same time, we must be cautious about the potential risks associated with their development in certain areas.
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a water diffuser is constructed like that in the fugre the volumetric flow rate at the entrance what is the expansion angle
Answers
The expansion angle is the angle formed between the diffuser inlet axis and the diffuser outlet axis. It is calculated as follows:θ = tan−1((A2/A1)^(1/n)-1) * (180/π)Where θ is the expansion angle, A1 is the cross-sectional area of the diffuser inlet, A2 is the cross-sectional area of the diffuser outlet, and n is the diffuser expansion coefficient.
A water diffuser is a hydraulic device that enlarges and diffuses a fluid stream. Water diffusers are primarily used to decrease the flow velocity of the fluid entering a pipe, channel, or other hydraulic structure, or to reduce the kinetic energy and momentum of the fluid.A water diffuser is constructed similarly to the one in the figure, which is designed to expand the volume flow rate while minimizing losses due to turbulence. The entrance to the diffuser has a volumetric flow rate that is less than the area of the diffuser outlet, so the fluid velocity at the entrance is higher than the fluid velocity at the outlet to satisfy the continuity principle.The expansion angle is the angle formed between the diffuser inlet axis and the diffuser outlet axis. It is calculated as follows:θ
= tan−1((A2/A1)^(1/n)-1) * (180/π)
Where θ is the expansion angle, A1 is the cross-sectional area of the diffuser inlet, A2 is the cross-sectional area of the diffuser outlet, and n is the diffuser expansion coefficient.
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a leading electronics manufacturer has discovered a new technology that dramatically improves the picture quality of plasma televisions. firms of all brands have free access to this technology.
Answers
This is a positive externality, and firms of all brands have free access to this technology.
What are the positive externalities?If a party not directly participating in the market transaction gains from the creation and consumption of an item or service, this is referred to as a positive externality. For instance, education not only benefits the person directly but also society overall by producing more knowledgeable and useful individuals. Due to overestimation of production costs and underestimation of returns, Private markets would underproduce in the presence of such favourable externalities. When a third party incurs expenses as a result of the creation or consumption of a good, this is known as a negative externality. Negative externalities are frequently illustrated by examples of air and noise pollution.Learn more about positive externalities refer to :
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Technician A uses three prong electrical cords when possible.
Technician B uses double insulated electrical tools. Which technician
is correct?
Select one:
A. Technician A only
B. Technician B only
C. Both technicians
D.Neither technician
Answers
Correct me if I’m wrong tnx
a commercial refrigerator with r-134a as the working fluid is used to keep the refrigerated space at -35 c by rejecting waste heat to cooling water that enters the condenser at 18 c at a rate of 0.25 kg/s and leaves at 26 c. the refrigerant enters the condenser at 1.2 mpa and 50 c and leaves at the same pressure subcooled by 6 c. if the compressor consumes 3.3 kw of power , determine (a) the mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
Answers
At 1.2mpa pressure and 50c
What is pressure?
By pressing a knife against some fruit, one can see a straightforward illustration of pressure. The surface won't be cut if you press the flat part of the knife against the fruit. The force is dispersed over a wide area (low pressure).
a)Mass flow rate of the refrigerant
Therefore h1= condenser inlet enthalpy =278.28KJ/Kg
saturation temperature at 1.2mpa is 46.29C
Therefore the temperature of the condenser
T2 = 46.29C - 5
T2 = 41.29C
Now,
d)power consumed by compressor W = 3.3KW
Q4 = QL + w = Q4
QL = mR(h1-h2)-W
= 0.0498 x (278.26 - 110.19)-3.3
=5.074KW
Hence refrigerator load is 5.74Kg
(COP)r = 238/53
(Cop) = 4.490
Therefore the above values are the (a) mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
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I need a description of a train station. Urgent. Thanks a lot
Answers
Answer:
The entire place was dark and cold as the train whooshed by. This place was nothing like Platform 9 and 3/4. The rain was loud on the roof of the station, but you could still hear the faint noises of a violin. "20 pence for requests" read a sign from a man who's just trying to get by.
Explanation:
hope this helps:)
.Write a program that uses a void function void miles_to_km() to generate a kilometer
conversion table for all even kilometers from 2 miles to 62 miles. Use two decimal
places for kilometers.
Answers
Explanation:
rational
Step-by-step explanation:
The discriminant (d) of a quadratic equation ax^2 + bx + c = 0ax
2
+bx+c=0 is:
\boxed{\mathrm{d =} \ b^2 - 4ac}
d= b
2
−4ac
.
If:
• d > 0, then there are two real solutions
• d = 0, then there is a repeated real solution
• d < 0, then there is no real solution.
In this question, we are given the quadratic equation 3x^2 + 4x - 2 = 03x
2
+4x−2=0 . Therefore, the discriminant of the equation is:
b² - 4ac = (4)² - 4(3)(-2)
= 16 - (-24)rational
Step-by-step explanation:
The discriminant (d) of a quadratic equation ax^2 + bx + c = 0ax
2
+bx+c=0 is:
\boxed{\mathrm{d =} \ b^2 - 4ac}
d= b
2
−4ac
.
If:
• d > 0, then there are two real solutions
• d = 0, then there is a repeated real solution
• d < 0, then there is no real solution.
In this question, we are given the quadratic equation 3x^2 + 4x - 2 = 03x
2
+4x−2=0 . Therefore, the discriminant of the equation is:
b² - 4ac = (4)² - 4(3)(-2)
= 16 - (-24)
= 40
Since the discriminant, 40, is greater than zero, the quadratic equation has 2 rational solutions.
= 40
Since the discriminant, 40, is greater than zero, the quadratic equation has 2 rational solutions.
when a is used with a smooth bore nozzle, turbulence can affect the quality of the solid stream if the valve is left partially open.
Answers
Answer:
ball valve
Explanation:
A one-dimensional plane wall is exposed to convective and radiative conditions at x- 0. The ambient and sur- rounding temperatures are T. = 20°C and Tsur-40°C, respectively. The convection heat transfer coefficient is h 20 W/m2- K, and the absorptivity of the exposed sur- face is α = 0. 78. Determine the convective and radiative heat fluxes to the wall at x= 0 if the wall surface tem- perature is T, 24°C. Assume the exposed wall surface is gray, and the surroundings are large
Answers
To determine the convective and radiative heat fluxes to the wall at x = 0, we can use the following equations:
1. Convective heat flux:
q_conv = h * (T_s - T_∞)
2. Radiative heat flux:
q_rad = α * σ * (T_s^4 - T_∞^4)
where:
q_conv is the convective heat flux (in W/m²),q_rad is the radiative heat flux (in W/m²),h is the convective heat transfer coefficient (in W/m²·K),T_s is the surface temperature of the wall (in °C),T_∞ is the ambient temperature (in °C),α is the absorptivity of the exposed surface (dimensionless),σ is the Stefan-Boltzmann constant (approximately 5.67 × 10^-8 W/(m²·K⁴)).Given:
T_∞ = 20°C
T_sur = 40°C
h = 20 W/(m²·K)
α = 0.78
T_s = 24°C
Let's calculate the convective and radiative heat fluxes:
1. Convective heat flux:
q_conv = 20 * (24 - 20) = 80 W/m²
2. Radiative heat flux:
q_rad = 0.78 * 5.67 × 10^-8 * ((24 + 273.15)^4 - (20 + 273.15)^4) = 238.17 W/m²
Therefore, the convective heat flux to the wall at x = 0 is 80 W/m², and the radiative heat flux is 238.17 W/m².
In this scenario, the one-dimensional plane wall is exposed to both convective and radiative heat transfer. The convective heat transfer occurs due to the temperature difference between the surface of the wall (T_s) and the surrounding ambient temperature (T_∞), which is characterized by the convective heat transfer coefficient (h). The convective heat flux represents the amount of heat transferred per unit area through convection.
The radiative heat transfer, on the other hand, occurs due to the temperature difference and the emissivity/absorptivity of the wall's exposed surface (α). The radiative heat flux depends on the Stefan-Boltzmann constant (σ) and the fourth power of the temperatures involved (T_s and T_∞). The emissivity/absorptivity of the surface determines how efficiently it radiates and absorbs thermal radiation.
In this case, since the surroundings are considered "large," we assume that the temperature of the surroundings (T_sur) remains constant and unaffected by the wall's heat transfer. This assumption simplifies the analysis by focusing only on the heat exchange between the wall and the ambient environment.
By applying the equations for convective and radiative heat fluxes, we can calculate the respective contributions to the total heat transfer at the wall's exposed surface.
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A multi-ribbed belt with an automatic belt tensioner experiences rapid wear. Technician A says the most likely cause is a misaligned belt pulley. Technician B says the most likely cause is excessive belt tension. Who is correct
Answers
Answer:
A
Explanation:
Excessive belt tension or high belt tension in belt result in the bearing of the stress that would lead to the failure of the motor while on the other hand the low tension is the belt represent the main reason of belt slipping that lead to the cause wear in belt. So here the automatic belt tensioner having multiple ribber beld shoiuld be used that we called as the serpentine belt in order to give the proper tension in the belt. In the case when the automatic belt tensioner is become order so it gives the non-proper tension as there is the requirement for replacement
A coil having resistance of 7 ohms and inductance of 31.8 mh is connected to 230v,50hz supply.calculate 1. The circuit current 2.the phase angle, 3.power factor, 4 the power consumed
Answers
(1) The current in the circuit is 18.87 A,
(2) The phase angle is 54.97°
(3) The power factor is 0.574
(4) The power consumed is 2491.2 W
(1) To calculate the current in the circuit, first, we need to find the overall impedance of the circuit.
We can calculate the overall impendence of the circuit using the formula below.
Z = √[R²+(2πfL)²]........................ Equation 1Where:
R = resistance of the coilf = FrequencyL = Inductance of the coilZ = Overall impedance of the circuitFrom the question,
Given:
R = 7 ohmsL = 31.8 mH = 0.0318 Hf = 50 Hzπ = 3.14
Substitute these values into equation 1
Z = √[7²+(2×3.14×50×0.0318)²]Z = √(49+99.7)Z = √(148.7)Z = 12.19 ohms.Therefore we use the formula below to calculate the current in the circuit.
I = V/Z.................. Equation 2Where:
V = VoltageI = current in the circuit.Given:
V = 230 V.Substitute into equation 2
I = 230/12.19I = 18.87 A(2) To calculate the phase angle, we use the formula below.
∅ = tan⁻¹(2πfL/R)............... Equation 3Where:
∅ = Phase angle.
Substitute into equation 3
(3) To calculate the power factor, we use the formula below.
pf = cos∅............ Equation 4Where:
pf = power factor.Substitute the value of ∅ into equation 4
pf = cos(54.97°)pf = 0.574.
(4) And Finally to calculate the power consumed we use the formula below.
P = V×I×pf................ Equation 5Where:
P = The power consumedSubstitute the values into equation 5
P = 230(18.87)(0.574)P = 2491.22 W
Hence, (1) The current in the circuit is 18.87 A, (2) The phase angle is 54.97° (3) The power factor is 0.574 (4) The power consumed is 2491.2 W
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A signal was acquired at 200 hz and the spectrum showed a peak at 70 hz. no anti-aliasing filter was used. find the 5 lowest possible frequencies that the original signal may have.
Answers
f1 = 70 Hz
f2 = 130 Hz
f3 = 270 Hz
f4 = 330 Hz
f5 = 470 Hz
This agency develops standards for pressure vessels and pressure relief valves, as well as the design, welding, and materials that may be used in pipeline construction.
Select one:
a. American Petroleum Institute
b. American Society of Mechanical Engineers
c. American Gas Association
d. National Fire Protection Association
Answers
Answer:
b. American Society of Mechanical Engineers
Explanation:
The "American Society of Mechanical Engineers" (ASME) is an organization that ensures the development of engineering fields. It is an accreditation organization that ensures parties will comply to the ASME Boiler and Pressure Vessel Code or BPVC.
The BPVC is a standard being followed by ASME in order to regulate the different pressure vessels and valves. Such standard prevents boiler explosion incidents.
A heat engine with a thermal efficiency of 25% is connected to an electric generator with an efficiency of 95%. A liquid fuel providing heat is consumed at 2.29 litres per hour. What is the power output in kW from the generator?
Heat of Combustion: 43.7 MJ/kg
Density of the fuel: 0.749 g/ml
Answers
Answer:
4.94 kW
Explanation:
The heat energy produced by the fuel in one hour is ...
(2.29 L/h)(0.749 kg/L)(43.7 MJ/kg) = 74.954677 MJ/h
Then the power output is ...
(74.954677 MJ/h)(1 h)/(3600 s) = 20.8207 kJ/s
Multiplying this heat energy by the efficiencies of the processes involved, the output power is ...
(20.8207 kW)(0.25)(0.95) = 4.94 kW
A programmer is deciding between using a linear or binary search to find a target value in a sorted list. Which of the following is true?
a. the advantage of using a binary search over a linear search increases as the size of the list increases.
b. The program can also be expressed as binary code, but will be more easily understood by humans when expressed in a higher-level programming language.
Answers
Linear search and binary search are two algorithms used to find a target value in a sorted list.
What are Algorithms: Linear & Binary?Linear search is a simple but inefficient algorithm that can be used on unsorted or small lists, while binary search is a more complex but efficient algorithm that requires a sorted list and is best suited for large lists.
According to question:
(A). The advantage of using a binary search over a linear search increase as the size of the list increases.
That's true. A linear search algorithm goes through each item in the list one by one until it either discovers the desired value or runs out of items to verify. In the worst situation, the algorithm must examine each element because the target value is the last item on the list. This indicates that a linear search has an O time complexity (n).
A binary search algorithm, on the other hand, continually splits the search period in half until it locates the desired value. This indicates that a binary search has an O time complexity (log n). The speed gap between linear and binary search becomes more pronounced as the size of the list grows.
(B). The program can also be expressed as binary code but will be more easily understood by humans when expressed in a higher-level programming language.
Although this assertion is true, it has little to do with whether to do a linear or binary search. Programs can be expressed as binary code, but this low-level form is difficult for humans to read or alter. Programmers find it simpler to read and create code in higher-level programming languages because they offer more abstraction and a syntax that is more like to natural language. The performance of the program could be impacted by the search algorithm selection, but the readability of the code is unaffected.
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In lighting system, why it is important to consider maintenance factor?
Answers
Answer: The maintenance factor of a lighting system reflects how much of the initial luminous flux is still available at the end of its useful life. The planned lighting engineer must compute the maintenance factor and multiply the new value of the light output by it.
Explanation:
Answer:
Explanation: A lighting system's maintenance factor indicates how much of the initial luminous flux remains available at the end of its service life. The maintenance factor must be determined by the planning lighting engineer and the new value of the luminous flux multiplied by it.