In a planar datum application, which datum plane must be contacted by three points?
Answers
In a planar datum application, the datum plane must be contacted by three points to establish a stable and unambiguous reference surface.
A datum is a theoretically perfect point, line, or plane that serves as a reference for dimensional measurements in design, manufacturing, and inspection processes. A datum plane, on the other hand, is a theoretical flat surface to which dimensions are referenced. Three points of contact are necessary for a planar datum because it ensures that the datum plane is uniquely defined, without any rotation or translation ambiguities. In practical applications, these points can be represented by physical features on an object, such as holes, pins, or surfaces. When defining a datum plane, it's essential to choose points that provide the best possible stability and repeatability during the manufacturing and inspection processes. In summary, for a planar datum application, a datum plane must be contacted by three points to establish a stable and unambiguous reference surface, ensuring accurate and consistent dimensional measurements.
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Related Questions
How many grains are on the surface of the head of a pin? assume that the head of a pin is spherical with a 1-mm diameter and has an astm grain size of 10
Answers
Answer:
Given, diameter of pin head d = 1 mm = 1/25.4 = 0.0394 in Surface area of a pinhead, A = 4pr^2 =
Explanation:
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what type of duct system is commonly used with mini-split heat pumps?
Answers
The most common type of duct system used with mini-split heat pumps is a ductless mini-split system.
A ductless mini-split system does not require traditional ductwork and instead uses small, individual air handlers placed throughout the home or building. However, some mini-split heat pumps can also be connected to a ducted system, where air is distributed through a network of ducts.
A duct system refers to a network of conduits or channels that are used to distribute air, heat, or ventilation throughout a building or a space. These ducts are typically made of metal, fiberglass, or flexible materials and are designed to transport air from one location to another.
Duct systems are commonly found in HVAC (Heating, Ventilation, and Air Conditioning) systems, where they play a crucial role in maintaining indoor air quality, temperature regulation, and ventilation.
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3. How can statistical analysis of a dataset inform a design process?
PLEASE I NEED THIS ANSWER
Answers
Answer:
you have to think then go scratch and then calculate and the design
Explanation:
The statistical analysis of a dataset inform a design process.
What is statistical analysis?Statistical analysis is a kind of tool which helps collect and analyze large amounts of data. This is helpful to identify common patterns of dataset and make trends to convert them into meaningful information.
Designers do make use of statistical analysis of dataset in design process.
Analysis is a key part of design process. Without analysis, nothing can be done in designing process.
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Which is an appropriate type of face and eye protection for resistance welding?
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Answer:
While resistance welding you should wear clear grinding glasses, unbreakable plastic face shields or clear unbreakable plastic goggles. When resistance welding a #10, or more, shade lens should be worn. All hand and portable tools should be inspected for loose parts, cleanliness, or worn power cords.
What type of sensor is used to indicate a yes-no or on-off condition. T/F
Answers
The type of sensor commonly used to indicate a yes-no or on-off condition is called a binary sensor.
This type of sensor detects the presence or absence of a certain condition or event and provides a digital output signal that indicates a true or false (yes or no) condition.
Binary sensors are widely used in a variety of applications, such as in home automation systems to detect motion or door/window opening and closing, or in industrial control systems to monitor the status of switches or valves.
They can be based on different physical principles, such as mechanical switches, magnetic reed switches, or optical sensors.
Binary sensors are simple and reliable, and their digital output can be easily processed by electronic circuits or microcontrollers for further processing or decision-making.
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suppose we have tables students(name, major), taking(studentname, coursename), courses(name, dept), covers(coursename, topicname), topics(name, description), and likes(studentname, topicname). then this query is monotonic: find all students who are taking chem 101 and like at least two topics covered in that course. suppose we have tables students(name, major), taking(studentname, coursename), courses(name, dept), covers(coursename, topicname), topics(name, description), and likes(studentname, topicname). then this query is monotonic: find all students who are taking chem 101 and like at least two topics covered in that course. true false
Answers
The given query "find all students who are taking chem 101 and like at least two topics covered in that course" is not monotonic.
Monotonicity in database queries refers to the property that if a certain condition holds for a subset of the data, then it should also hold for any superset of that data. In other words, if we add more data to the tables, the query should still return the same or more results.
In the given query, the condition "like at least two topics covered in that course" introduces a non-monotonic condition. Adding more data to the tables may change the number of topics covered in the course, and therefore the result of the query may change. Hence, the query is not monotonic.
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When traveling at higher speeds (40 mph or faster), the most fuel efficient way to keep the car cool is to
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Answer:
When traveling at higher speeds (40 mph or faster), the most fuel-efficient way to keep the car cool is to follow these tips:
1. Use the vehicle's ventilation system: Instead of relying on air conditioning, use the car's ventilation system to circulate fresh air from outside. This helps to cool down the interior without putting extra load on the engine, thus saving fuel.
2. Close windows and sunroofs: To reduce wind resistance and drag, close all windows and sunroofs while driving at higher speeds. Open windows create drag, which can increase fuel consumption.
3. Park in the shade: Whenever possible, park your car in a shaded area to avoid excessive heating when it's not in use. This can help keep the car cooler and reduce the need for extra cooling when you start driving.
4. Use reflective sunshades or window tinting: Use reflective sunshades on your windshield and window tinting on side windows to reduce the amount of heat entering the car. This can help keep the interior cooler, reducing the need for excessive cooling while driving.
5. Maintain your vehicle: Regular maintenance, such as checking and replacing coolant, inspecting the radiator, and ensuring proper functioning of the engine cooling system, can help keep your car running efficiently and prevent overheating.
6. Plan your trips strategically: If possible, try to avoid driving during the hottest part of the day. By planning your trips to avoid peak temperatures, you can reduce the strain on your vehicle's cooling system and minimize the need for excessive cooling.
Remember that these tips are specifically focused on keeping the car cool while maintaining fuel efficiency at higher speeds. In certain circumstances, such as extremely hot weather, using the air conditioning sparingly may be necessary for passenger comfort, but it will increase fuel consumption.
Provide counterexamples to the following statements. a. If a and b are integers where a| b and b a, then a-b. b. If? > 0 then n > 0. C. If n is an even number, then n2 + 1 is prime. d. If n is a positive integer, then n>n
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a. Counterexample: a = 4, b = 8; a|b and b = a, but a-b = -4.
b. Counterexample: ? = -1 and n = 0; ? > 0, but n > 0 is false.
c. Counterexample: n = 4; n is an even number, but n2 + 1 = 17, which is not prime.
d. Counterexample: n = 0; n is a positive integer, but n = 0 and 0 > 0 + 1 is false.
What is Integer?
Integer is a data type used in programming to represent whole numbers. It is a numerical data type that can be positive, negative, or zero. Integers are the building blocks of programming, and they are often used in calculations and mathematical operations. Integer values cannot contain any fractional or decimal components. They can be represented in various formats, including hexadecimal, octal, decimal, and binary formats. Integer values are usually stored in a computer's memory as 32-bit or 64-bit words, depending on the system.
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3. Suppose up to 300 cars per hour can travel between any two of the cities 1, 2, 3, and 4. Formulate a maximum flow problem that can be used to determine how many cars can be sent in the next two hours from city 1 to city 4. Give the network diagram and the LP formulation for your model.
Answers
Let $x ij$ represent the quantity of cars that will be delivered in the following two hours from city I to city j.
Create a maximum flow issue?Network Diagram:
LP Formulation:
Maximize Z = 150x14 + 150x24
Subject to:
x11 + x12 + x13 + x14 <= 300 (flow from city 1 to other cities)
x21 + x22 + x23 + x24 <= 300 (flow from city 2 to other cities)
x31 + x32 + x33 + x34 <= 300 (flow from city 3 to other cities)
x41 + x42 + x43 + x44 <= 300 (flow from city 4 to other cities)
x11 + x21 + x31 + x41 = 150 (flow into city 1)
x12 + x22 + x32 + x42 = 150 (flow into city 2)
x13 + x23 + x33 + x43 = 150 (flow into city 3)
x14 + x24 + x34 + x44 = 150 (flow into city 4)
xij >= 0 (all variables must be positive)
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Which of the following is a true statement concerning the production of electricity in conventional nuclear power plants using fission reactors?
A. New nuclear power plants will be built without containment structures, due to the increased insulation in the reactor core.
B. Thermal energy is converted into mechanical energy and then to electrical energy, as in coal-burning power plants.
C. Regularly scheduled releases of radioactive gases during production are well below the maximum contamination levels set by the EPA (Environmental Protection Agency).
D. Nuclear production of electricity is much less expensive per kilowatt-hour than production of electricity at a coal-burning or natural- gas-fueled power plant.
E. Storage of nuclear waste is no longer an issue, because power plants are now storing all wastes on-site in specialized containment units.
Answers
Thermal energy is converted into mechanical energy and then to electrical energy, as in coal-burning power plants.
What is Thermal energy?The movement and transfer of heat energy is the focus of the specific subfield of thermal engineering in mechanical engineering. The energy can be changed into different types of energy or transported between two different media.The movement and transfer of heat energy is the focus of the specific subfield of thermal engineering in mechanical engineering. The energy can be changed into different types of energy or transported between two different media. Thermal engineering focuses on heat transfer, fluid mechanics, and heating and cooling systems, such as those used in the electric power business, the automotive industry, and the heating, ventilation, and air conditioning (HVAC) industry. Thermal energy is the motion of molecules within a material or an item.To learn more about Thermal energy refer to:
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In a certain balanced three phase system each line current is a 5a and each line voltage is 220v . What is the approximate real power if the power factor is 0.7
Answers
Answer:
1,334
Explanation:
In a certain balanced three phase system each line current is a 5a and each line voltage is 220v . 3.87 kilowatts is the approximate real power if the power factor is 0.7.
The idea of real power in a balanced three-phase system is critical in electrical power systems. It denotes the actual power transferred and used by the system, which is usually measured in kilowatts (kW) or megawatts (MW). Understanding real power is critical for evaluating electrical system efficiency and performance. Real power is the component of power in a balanced three-phase system that does useful work, such as operating motors, generating heat, or powering appliances.
Real Power (P) = √3 × Line Current (I) × Line Voltage (V) × Power Factor (PF)
P = √3 × 5 A × 220 V × 0.7
P = 3.87 kilowatts (kW)
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you are designing a complete mix lagoon system to treat waste containing a non-conservative pollutant. The waste stream has a flow rate of 3,500 L/d and pollutant concentration of 20.0 mg/L. The pollutant decyas with a reaction rate coefficient of 0.50/ day.
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Answer:
hgyvivihoy if he ogzrs go figure do it idydu
What would happen if an exposed film was accidentally placed in the fixer before being placed in the developer
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In the figure below, block A weighs 20 lb , while block B weighs 10 lb . Friction between the surfaces of the two blocks may be assumed negligible, but there is friction between block A and its underlying surface, and between block B and its adjacent confining surface, both with a kinetic friction coefficient of 0.25. The angle that the inclined face of block A makes with the horizontal is θ= 75 ∘ . A vertical downward force, P= 8 lb is applied to block B .
What is the acceleration of block B?
What is the acceleration of block A?
Answers
Answer:
As P is continually increased, the block will now slip, with the friction force acting on the block being: f = muK*N, where muK is the coefficient of kinetic friction, with f remaining constant thereafter as P is increased.
estion 4
While discussing automotive batteries.
Technician A states; automotive batteries must be disposed of or recycled at dedicated facilities.
Technician B states; when jump starting a vehicle, the last connection is the positive cable.
O Neither technician "A" nor "B"
Both technician "A" and "B"
O Technician "B" only
O Technician "A" only
Answers
In regards to discussing automotive batteries. Both technician "A" and "B" are correct. Hence option B is correct.
What are the automotive batteries about?Automotive batteries must be disposed of or recycled at dedicated facilities because they contain lead and acid, which are hazardous materials. These facilities are equipped to properly handle and dispose of these materials in an environmentally safe way.
Therefore, When jump starting a vehicle, the last connection should be the positive cable. This is because the positive cable carries the electrical charge that starts the vehicle, and connecting it last prevents any sparks from occurring near the battery, which could cause an explosion or fire.
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which architectural best practices should be followed to reduce interdependencies between systems? aws
Answers
Loose Coupling. Loose coupling is a method of connecting system or network components so that they depend on one another as little as possible. These components are also known as elements.
What does "loose coupling" mean?Loose coupling is a method of connecting system or network components so that they depend on one another as little as possible. These components are also known as elements. The degree of direct knowledge that one element has about another is referred to as coupling.An architecture that achieves loose coupling offers a number of benefits, such as: Loosely connected services boost the evolvability, encourage various adjustments, and lead to new solutions, particularly in scenarios where the system must be able to adapt to environmental changes.A loosely linked system is one that has components that are weakly related (have breakable relationships) with one another, meaning that changes to one component have the least impact on the existence or functionality of another component.To learn more about Loose coupling refer to:
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you perform 100 j of work on a refrigerator that extracts heat from a cold reservoir and dumps heat into a hot reservoir. the amount of heat dumped into the hot reservoir must be
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With 100 J of heat available from the first law of thermodynamics, we would dump it into the hot reservoir.
What exactly is the first thermodynamics law?We are aware that the study of heat transfer falls under the purview of thermodynamics. Heat is a factor that could raise an object's temperature. As a result, heat can also be referred to as a type of energy that results from the temperature differential between the things.
The heat engine reservoir is what?A heat engine is a device that uses a heated body as a reservoir and transfers heat there from to perform work. A small amount of heat is discharged toward the sink (cold body).
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Priya is planning the cabling design for the company's new headquarters. One of the runs of cable needs to go behind the elevator bank's hydraulics and motors to the reception area computer. Which of the following types of cable would be the best choice? 1. fiber
2. STP
3. UTP
4. Plenum
Answers
Since one of the runs of cable would need to go behind the elevator bank's hydraulics and motors to the reception area computer, the type of cable which would be the best choice for Priya is: 2. STP.
What is a cable?In Engineering, a cable can be defined as a type of wired connector which is either made of glass or copper and used for connecting one network device to another, so as to form an active computer network and enable the continuous transmission of data between them.
What is STPIn Computer networking, STP is an abbreviation for Shielded twisted pair and it can be defined as a specialized copper telephone and local area network (LAN) cable that is designed and developed with an additional shielding (outer covering), in order to mitigate crosstalk and other forms of electromagnetic interference (EMI) when transmitting data over a telecommunication network.
In this scenario, it is very important and essential for Priya to make use of a Shielded twisted pair (STP) cable since the cable would go behind elevator bank's hydraulics and motors, which may cause electromagnetic interference (EMI).
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which rfc describes the icmpv6 error message type packet too big?
Answers
The RFC that describes the ICMPv6 error message type "Packet Too Big" is RFC 4443.
RFC 4443 specifies the "Packet Too Big" ICMPv6 error message type, which is used by routers to inform the sending host that the packet it sent exceeded the maximum transmission unit (MTU) of a link. The message includes the MTU value that should be used for future transmissions. This allows the sender to reduce the packet size to ensure successful delivery. The "Packet Too Big" message helps in efficient path MTU discovery, enabling effective communication in IPv6 networks.
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WILL GIVE BRAINLEY PLZZZZZZZ
how is a electrical resistance similar to the diameter of a pipe of water
Answers
Answer:
The resistance of the flow of charges in an electric circuit (electrical resistance) is analogous to the frictional effect between water flow through a pipe and the pipe's surface
Explanation:
In comparison to its similarity to the diameter of the pipe affects the flow of water and acts a a factor affecting resistance so are there factors affecting electrical resistance.
in an electrical circuit:
the total length of the wire is to the length of a pipe of water
the cross-sectional area of the wire is to the diameter of a pipe of water.
Thus, the cross sectional are affects the amount of electrical resistance. Wider wires have wider cross-sectional area and vice versa. Also, water will flow (i.e. current) through a wider pipe (i.e. large diameter) at a faster rate than a narrow pipe (i.e. small diameter). This is due to the lower amount of resistance offered by the wider pipe.
in the same manner, the wider the wire, the lesser the electrical resistance to the flow of elsctric charge and vice versa for thiner wires.
In the air with the antiskid armed, current cannot flow to the antiskid control box becauseA. landing gear squat switch is open.B. landing gear down and lock switch is open.C. landing gear antiskid valves are open.
Answers
When the antiskid system is armed during flight, it is designed to prevent skidding of the aircraft's wheels during landing. However, in this state, current cannot flow to the antiskid control box. The reason for this is because the landing gear squat switch is open.
This switch is located on the main landing gear and is designed to detect when the wheels are on the ground during landing. When the switch is closed, it allows the current to flow to the antiskid control box. However, since the switch is open during flight, the current cannot reach the control box, even if the landing gear antiskid valves are open. Therefore, the landing gear squat switch plays a critical role in ensuring the proper functioning of the antiskid system during landing.
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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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A low-resistance path in a circuit, commonly called a _____ can cause a circuit breaker to trip
A. short circuit
B. closed circuit
C. parallel connection
D. series connection
Answers
Answer:
b
Explanation:
A crawl space or underfloor space must contain ____. Question 3 options: A) at least 4 ft of head clearance B) dedicated HVAC branch circuits C) a disconnecting means for HVAC equipment D) access to HVAC equipment
Answers
A crawl space or underfloor space must contain C) a disconnecting means for HVAC equipment.
What is the HVAC equipment?Major HVAC equipment includes heaters, air handling units, and chillers or air conditioners. The central HVAC system is located away from the central equipment room building and supplies conditioned air through the duct system.
The air conditioner circuit breaker (ACD) is located between the road center and the air conditioner. ACDs provide a visible disconnecting means when performing maintenance and are commonly referred to as circuit breakers, extractors, or air conditioning switches.
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(3 points) One end of a 48 cm long copper rod with a diameter of 2.0 cm is kept at 360 ° C, and the other is immersed in water at 32° C. Calculate the heat conduction rate along the rod. The thermal conductivity for copper is 386 MK
Answers
Answer:
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Explanation:
please
Toyotas more than 30 hybrid vehicles investment in zero emissions vehicle and working on developing hydrogen fuel cell vehicles not only protect the natural environment but also further his overall economic progress customer is generally has positive feelings towards companies that focus on______ efforts such as Toyotas
Answers
The missing term in the presented paragraph is environmental.
In recent years the effects of climate change have been strongly manifested around the world causing:
Forest firesFloodsHeatwavesCold wavesSnowfallThe rise in the level of rivers and seasDeglaciationTherefore, many companies have begun to investigate productive alternatives to reduce their environmental impact. In the case of the car industry, companies have deepened their research on other sources of energy such as:
ElectricSolarWindOne of them is Toyota, the Japanese brand that has developed cars that work hybrid, that is, with gasoline and electric power. This will reduce the emissions of CO2 and other harmful gases into the atmosphere.
Therefore, it is possible to infer that the missing term in the paragraph is Environmental.
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Check screen shot
Answers
Answer:
okay checked it
Explanation:
What is the condition for maximum efficiency in a DC motor?
Answers
Answer:
The efficiency of a DC generator is maximum when those losses proportional to the square of the load current are equal to the constant losses of the DC generator. This relation applies equally well to all rotating machines, regardless of the type of machine.
Explanation:
The roller coaster car having a mass m is released from rest at point A Neglect friction (Figure 1) Part A
It the track is to be designer so that car does not leave it at B determine the required height h Express your answer to three Significant figures and Include the appropriate units. Part B
Find the speed of the car when it roaches point C. Express your answer to three significant figures and include the appropriate units.
Answers
The car's speed as it approaches the spot Part B's v = 14.3 m/s and Part A's h = 8.94 metres.
What is speed?
The speed of an object, also known as v in kinematics, is the size of the change in that object's position over time or the size of the change in that object's position per unit of time, making it a scalar quantity. The instantaneous speed is the upper limit of the average speed as the duration of the time interval approaches zero. The average speed of an item in a period of time is the distance travelled by the object divided by the duration of the period. Velocity and speed are not the same thing.
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genetic engineering is possible because the genetic code of all organisms is based on the same _______________. however, all attempts to genetically engineer new organisms are not successful.
Answers
Answer:
DNA
Explanation: