0
Engineering
Engineering is an art and profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life.
5,839 Questions
What are examples of moments of inertia in sports equipment?
Inertia coinsides (excuse me for my spelling if there are any mistakes!) with Newton's 1st Lqaw. So say the quarterback for the football team is running straight for the goal poast, if the object ( Qb) is in motion it will stay in motion unless acted upon by an unbalanced force(Some 500 pound guy from the opposite team), it will remain at rest. ( A quarterback is going to kick a ball that was a rest. The Qb's kick is the unbalanced force.) <<<<ARK>>>>
Inertia coinsides (excuse me for my spelling if there are any mistakes!) with Newton's 1st Lqaw. So say the quarterback for the football team is running straight for the goal poast, if the object ( Qb) is in motion it will stay in motion unless acted upon by an unbalanced force(Some 500 pound guy from the opposite team), it will remain at rest. ( A quarterback is going to kick a ball that was a rest. The Qb's kick is the unbalanced force.) <<<<ARK>>>>
Inertia coinsides (excuse me for my spelling if there are any mistakes!) with Newton's 1st Lqaw. So say the quarterback for the football team is running straight for the goal poast, if the object ( Qb) is in motion it will stay in motion unless acted upon by an unbalanced force(Some 500 pound guy from the opposite team), it will remain at rest. ( A quarterback is going to kick a ball that was a rest. The Qb's kick is the unbalanced force.) <<<<ARK>>>>
Describe the difference between weapons grade and reactor grade nuclear fuel?
Uranium in nature is only about 0.7% 235U. In order to have a chain reaction, the percentage of 235U must be increased by enrichment. The percentages of 235U in nuclear reactors are generally low, about 3% to 5%. For bombs, the percentage is generally 85% or more.
What direction does electricity flow in a simple circuit?
This is a very complicated question in reality. in a simple Dc circuit (i.e. a battery driven circuit) there are 2 way's that current is talked about. the reason is historic, so here goes a very brief answer.
When people first beagn to identify how current flowed in circuits there was a school of thought that a sort of liquid flowed in electric circuits, and the driver (battery) had parts that had an excess of the liquid, and parts that had less. The bits with more were positive + and the bits with less were lacking (negative) - Naturally the liquid would try to balance the circuit, and so current was said to flow from positive to neagtive. This is referred to as conventional current.
so Conventional current is said to flow from positive to negative.
Thanks to the work of Earnest Rutherford and Niels Bohr (a student of rutherford) we now know that electric current flows as a result of electrons in the wire bumping along the wire jumping from atom to atom. This actually means that in reality current should have been flowing from negative (a surplus store of electrons) to positive (a lack of electrons) to avoid confusion, a new term was coined. Electron Flow.
so Electron Flow is from Negative to Positive.
Now to your question. How does electricity flow in a simple circuit. A Battery has 2 plates, one charged with a surplus of electrons, and one lacking electrons. When a circuit is closed, the difference in the potential of the plates (called potential difference, and measured in Volts) causes electrons to be pushed into one end of the wire at the negative terminal, while a strong pull is made on the other end of the wire by the positive terminal. The electron at the negative terminal pushes its way onto the copper atom, making it's charge unbalance, so it lets one of its electrons go, this free electron, moves on the next atom ... and so on, literally bumping electrons along the wire in the direction of pull, created by the battery. finally an electron exists the wire into the battery and one electron has been transfered to balance the battery charge.
The stronger the force (Voltage) the faster the electrons flow, this continues until the driving force (battery) is balanced (discharged) when we say the battery is flat.
Hope this makes it a bit easier to understand what is happening, even if I can't exactly answer the question But I suspect your answer should be Electron Flow in a simple electrical circuit is from Negative to positive.
How does polarity affect electrons?
By switching from one pH range to another, the compound changes its polarity and its preference for residing in either a polar or non-polar solvent.
What are the advantages of CASE tools?
a class of software that automates many of the activities involved in various life cycle phases. For example, when establishing the functional requirements of a proposed application, prototyping tools can be used to develop graphic models of application screens to assist end users to visualize how an application will look after development. Subsequently, system designers can use automated design tools to transform the prototyped functional requirements into detailed design documents. Programmers can then use automated code generators to convert the design documents into code. Automated tools can be used collectively, as mentioned, or individually. For example, prototyping tools could be used to define application requirements that get passed to design technicians who convert the requirements into detailed designs in a traditional manner using flowcharts and narrative documents, without the assistance of automated design software
HTML stands for Hyper Text Markup Language. It is used to code (program) the basic elements of the web and webpages. Basically, it is a way to set the basic blocks for other languages (like Javascript and CSS) to manipulate. HTML stands for Hyper Text Markup Language. It is used to code (program) the basic elements of the web and webpages. Basically, it is a way to set the basic blocks for other languages (like Javascript and CSS) to manipulate.
What are theApplications of stack in data structure?
1. Expression evaluation and syntax parsing
Calculators employing reverse Polish Notation use a stack structure to hold values. Expressions can be represented in prefix, post fix or infix notations. Conversion from one form of the expression to another form may be accomplished using a stack. Many compilers use a stack for parsing the syntax of expressions, program blocks etc. before translating into low level code. Most of the programming languages are context-free languages allowing them to be parsed with stack based machines.
2. Runtime memory management
A number of programming languages are stack oriented , meaning they define most basic operations (adding two numbers, printing a character) as taking their arguments from the stack, and placing any return values back on the stack. For example, Post Script has a return stack and an operand stack, and also has a graphics state stack and a dictionary stack.
3. SecuritySome computing environments use stacks in ways that may make them vulnerable to security breaches and attacks. Programmers working in such environments must take special care to avoid the pitfalls of these implementations.
Translate the system performance
Why capacitors cannot be used with direct current?
DC does not travel through a capacitor for long because there is a buildup of charge on the plates and when the voltage matches the supply voltage, mo more current flows.
But capacitors are used to smooth a DC supply because a capacitor acts a bit like a small battery and can prevent any rapid fluctuations in the supply voltage.
What language is used for robot programming?
A bot can be written in a server-side language like php, asp, etc.
How much fuel does a cargo ship use?
Many ships use MDO or Marine Diesel Oil, sometimes also known as #2 Diesel. Ships can also use HFO or Heavy Fuel Oil or Bunker C. These are crude oil derivatives that are largely unrefined. They are very thick and need to be heated by steam in order to reduce its viscosity to allow them to flow.
What are guided unguided media?
guided media is the transmission medium in which data/signal is guided by the cable or wire so used to a specific path. there are 4 types of guided media
--> open wire
-->twisted pair
--> co-axial cable
-->optical fibre
for more details open the link -----
http://www.techbooksforfree.com/intro_to_data_com/page37.html#37
How is sodium separated from other materials found with it?
Take a container with both elements and lower the temp. to -77 degrees; the liquid that forms is nitrogen & the other remains a gas. :)
What are the steps of the engineering process?
Identifying a need, researching the background of that need, making a plan to meet the need, doing the work, evaluating the results, looking for improvements
What are the uses of semimetals?
A semiconductor is a material that has a particular property that can allow or block the flow of electrons - a property that is very useful in transistors, integrated circuits, and other electronic components (such as microprocessors).
Can you weld a cracked cast iron pot belly stove?
yes, with a cast iron rod and an oxy-fuel set up or with a nickel rod and an arc machine
Aluminium is aluminum, a recyclable metal that is lightweight, strong, and conductive. It is inexpensive and will not rust, nor will this natural resource ever run out because to some extent, the earth's crust is made of it. It can be molded into casts, worked with machine tools, and made into sheet metal, making it useful for a wide variety of products. Some interesting facts about aluminum Though it is inexpensive today, it wasn't always. Napoleon's best cutlery was made of it, and his second-best cutlery was gold. Originally named Aluminum by Sir Humphrey Davy in 1808, it is also known as aluminium. Density of aluminum is 2.7 and its melting point is 660 degrees Celsius. Aluminum is a pure element that appears on the Periodic Table. In contrast to iron, which produces an oxide that is much bigger than iron and produces rust, aluminum oxide is the same size as aluminum. Instead of forming rust, the oxide forms a protective layer.
It is a strong metallic rust proof metal.
Aluminium is a silvery white and ductile member of the boron group of chemical elements. It has the symbol Al; its atomic number is 13. It is not soluble in water under normal circumstances. Aluminium is too reactive chemically to occur in nature as the free metal. Instead, it is found combined in over 270 different minerals.
The chief source of aluminum is bauxite ore.
Aluminium is a soft, durable, lightweight, malleable metal with appearance ranging from silvery to dull grey, depending on the surface roughness. Aluminium is nonmagnetic and nonsparking. It is also insoluble in alcohol, though it can be soluble in water in certain forms. The yield strength of pure aluminum is 7-11 MPa, while aluminum alloys have yield strengths ranging from 200 MPa to 600 MPa. Aluminium has about one-third the density and stiffness of steel. It is ductile, and easily machined, cast, and extruded.
Aluminium is a good thermal and electrical conductor, by weight better than copper. Aluminium is capable of being a superconductor, with a superconducting critical temperature of 1.2 kelvin and a critical magnetic field of about 100 gauss.
However, because of its strong affinity to oxygen, it is almost never found in the elemental state; instead it is found in oxides or silicates. Feldspars, the most common group of minerals in the earth's crust, are aluminosilicates. Native aluminum metal can be found as a minor phase in low oxygen fugacity environments, such as the interiors of certain volcanoes.
Although aluminum is an extremely common and widespread element, the common aluminum minerals are not economic sources of the metal. Almost all metallic aluminum is produced from the ore bauxite. Bauxite occurs as a weathering product of low iron and silica bedrock in tropical climatic conditions.
What inventions revolutionized transportation?
Boats, trains, and carts revolutionized transportation.
How do you read an engineering scale?
Cache line is a measure of its length is divided into equal parts. With a ruler to draw lines to direct and accurate. ruler are made with different line lengths. ruler is an important tool in technical drawing.
How much pressure take in hydraulic system?
Hydraulic systems are either gravity feed systems or pressurized systems. In a gravity feed system the pressure is produced as a result of an elevated tank holding the motive fluid, returns are pumped back to the tank from a collector tank at the bottom of the system. In a pressurized system a hydraulic positive displacement pump pumps the fluid into the system pressurizing it. Relief valves will dump excess pressure back to the holding tank.
