0
Technology
The practical application of knowledge, especially in a particular area, is called technology. Advances in technology affect every area of our lives. This category is for questions about technology and includes everything from how to remove a scratch from a CD to applications of electronics to what polyester is made from and more.
35,090 Questions
motion sensors see by sending out waves and timing how long it takes them to get back, when this time changes ( like someone stepping into a room) the motion sensor can tell that motion has been detected
What happen when you increase picks in fabric?
When you increase picks in fabric, the fabric becomes denser and stronger due to more yarns being interlaced in the fabric structure. This can also lead to better coverage and improved resistance to wear and tear. However, increasing picks can also result in a heavier and stiffer fabric with reduced drape and flexibility.
Did the telephone save time or money?
Because of the telephone first nations people so on, so on, they didn't have to travel ALL the way across the country. But saving money there could be a posiblilty of they governent or president that get's money from the phone bill. -Mouseadoodle
What is the purpose of polymers?
Polymers serve a variety of purposes, including being used as materials for manufacturing plastics, fibers, rubber, and adhesives. They are also essential in industries like healthcare, construction, and electronics for applications such as drug delivery, insulation, and circuitry. Additionally, polymers can be designed with specific properties to meet diverse needs, making them versatile and valuable materials.
Meaning:
A photometer for comparing two light radiations wavelength by wavelength
Classified under:
Nouns denoting man-made objects
Hypernyms ("spectrophotometer" is a kind of...):
photometer (measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source)
Meaning:
A photometer for comparing two light radiations wavelength by wavelength
Classified under:
Nouns denoting man-made objects
Hypernyms ("spectrophotometer" is a kind of...):
photometer (measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source)
What factors determine the maximum altitude of an airplane?
Short Answer:
An airplane maintains altitude by producing enough lift to counteract its own weight. So the amount of lift an airplane produces determines how high it can climb. Lift is produced by accelerating air in a downward direction. At higher altitudes the air is less dense so a larger volume must be accelerated downward to produce enough lift to keep flying. This can be done in two main ways; flying faster or having longer wings. The faster you fly the more air you pass through so the more you can accelerate downward which generates more lift. The longer your wings are the more surface area you have to generate lift so you can maintain altitude. You can also make your plane lighter while maintaining its top speed and wing length by carrying less fuel and cargo or using smaller pilots. Given the same speed and wing length a lighter plane can maintain altitude in less dense air so it can climb higher than a heavier plane that is traveling the same speed.
Longer Answer:
Lift can also be generated by an airplanes engine if that engine is pointed towards the ground. In fact some airplanes can fly straight up by generating all their lift with their engine and none with their wings. So with a powerful enough engine there is not limit to how high an airplane can fly. However most airplanes use "air breathing" engines that burn fuel with oxygen supplied by the atmosphere. The higher you go the less air there is in a given volume of sky so the less oxygen is gets sucked into the engine to burn fuel. Pilots have reduce the fuel flow to their engines as they go higher since the extra fuel would be wasted with no oxygen to burn it and it would tend foul the engine with partially burned residue making it run less efficiently or stalling it out completely. With less fuel to the engines the airplane slows down until it produces exactly enough lift to maintain its altitude. It's possible to get a little higher by diving and speeding up then pulling up hard and letting the airplanes momentum carry it to a higher altitude temporarily but when it slows down it will drop back to an altitude where lift equals the planes weight at the highest speed possible given the amount of oxygen in the air at that altitude. If a plane could get going over 25,000 mph (33 times the speed of sound) and and coast out of the atmosphere before it slowed down much below that speed it would keep going since it would be above escape velocity needed to get out of the earth's gravitational field. If it were pointed in the right direction and kept going faster than about 17,000 mph it could go into orbit in space.
Rocket engines carry their own oxidizer which contains the oxygen to burn the fuel so they can run even in the vacuum of space above around 100 km (330,000 feet). The only limitation on altitude for them is how much fuel they can carry before they are too heavy to lift themselves.
So the real answer to the question is that the main factor determining maximum altitude for an airplane is how high the engine can go before the air gets too thin to maintain enough velocity to balance the plane's weight against lift. Longer wings and less drag (a more aerodynamic shape) will help the same engine fly higher as will a lighter plane.
An airplane with a rocket engine that does not breath air is limited by how much fuel it can lift when starting off. Too much fuel weight and the plane won't take off until the excess weight of fuel has been burned. Once the rocket plane lifts off the altitude limit is determined by how fast the plane can get going before running out of fuel. If it can accelerate to 25,000 mph or faster it can go forever. If it can go at least 17,000 mph it can go into orbit in space more than 330,000 feet up (62 miles). Otherwise you can use rocket science equations to figure out how high it can get before it starts falling using the vehicle mass, rocket engine thrust, fuel burn rate and atmospheric drag. This is a complex calculation because the mass, and atmospheric drag change as a function of altitude and the fuel burn rate and engine thrust usually don't stay the same throughout the flight.
Do running water derive energy from sun?
Running water does not receive energy directly from the sun. The energy in running water comes from the water cycle, where the sun's energy evaporates water from oceans and lakes, which then falls as precipitation and flows downhill due to gravity, creating streams and rivers that can be used for hydroelectric power generation.
Can you walk faster than normal in Clubpenguin?
No, players cannot walk faster than the normal speed in Club Penguin. The game has a fixed speed for all characters to maintain fair gameplay.
The pH of human milk typically ranges from 7.0 to 7.5. This pH range is important for maintaining the balance of acidity in the baby's stomach and ensuring proper digestion and absorption of nutrients.
What happens when you put a lightsaber in water?
Although lightsabers don't exist to prove it, the water will likely instantly turn into steam.
Another answer:
A mysterious light emerges from the water whispering your name. You lean in closer to examine it. You are under its spell. You reach in to touch it, but all you get in return is a roundhouse kick in the face by none other than Chuck Norris!
Mediums are made of molecules. Actually, we're all made of molecules whether we are mediums or not. We require molecules to breath, to drink, to eat, and to exist. Psychic ability has no bearing on one's need for molecules.
What are three Eco issues concerning fashion and fabric?
Three eco issues could be pollution from manufacturing. The energy used to create textiles. And the amount of waste material created by the textile industry.
Traditionally, there is a lot of waste in fabric and garment manufacturing. These "scraps" were usually just thrown away, which was very wasteful. Today companies are recycling scraps to make new products, recycled nylon and polyester are becoming very popular.
Companies are also looking into producing synthetic fibers from corn and other non-petroleum based sources. Currently, all synthetic fibers come from petroleum, meaning polyester, nylon, and lycra/spandex all come from oil. Obviously, if we could develop similar fibers without oil it would be a good thing.
Another issue you might be interested in is anti-microbial textiles, which are fabrics and fibers that can kill micro organisms such as bacteria. Many of these anti-microbial fabrics are environmentally safe and use no poison or chemicals that can lead to super bacteria. One method involves using nano scale "spikes" that literally impale bacteria and kill them. Another is lacing fabric with silver, which is naturally anti microbial.
What happens to the electrons after they have hit the inner face of a CRT?
Ever notice how the front of some CRTs tend to become "staticy" if you run your hand across it? That's a result of build-up of charge.
On newer TVs there is an aluminum layer that conducts the electrons (charge) away.
From Wikipedia:
When electrons strike the poorly-conductive phosphor layer on the glass CRT, it becomes electrically charged, and tends to repel electrons, reducing brightness (this effect is known as "sticking"). To prevent this the interior side of the phosphor layer can be covered with a layer of aluminum connected to the conductive layer inside the tube, which disposes of this charge. It has the additional advantages of increasing brightness by reflecting, towards the viewer, the light emitted towards the back of the tube. The aluminum layer also protects the phosphors from ion bombardment.
What is function of s0 and s1 pins?
The S0 and S1 pins on an integrated circuit or microcontroller are often used to set the operating frequency or mode of the device. They can be used to configure various settings such as clock speed, power-saving modes, or addressing modes depending on the specific device and application.
Why is concave lens called a negative lens?
A concave lens is called a negative lens because it causes light rays passing through it to diverge, or spread out. This is in contrast to a convex lens, which converges light rays and is called a positive lens. The negative or positive designation refers to the effect the lens has on the light rays.
An ultrasound probe is a handheld device that emits sound waves and captures the echoes that bounce back from internal organs and tissues. It is used in medical imaging to produce real-time images of the body's structures like organs, muscles, and blood vessels. The probe is moved over the skin's surface to visualize internal structures.
Can smell be transmitted through television?
Not using current technology and television sets.
-- answer --
As a sound track is made along film tapes, so also, smell track can be made, synchronising with the visual image. A set of selection of likeable fragrance each attached to a specific radio wave can be used to activate a kit filled with such herbal extract or synthetic fluids or chemicals safe to human body.
Such a kit can be attached to television set which would receive 'tele-signals' to activate and spread the particular fragrance as wanted.
It can even have a therapeutic effect; would need a lot of research before launching the product.
...what a wonder,even a smell track with a sound track along a 'film tape'!
P.S.- Wrote to bbc.co.uk on 4.4.07
Atoms are small because they are the building blocks of matter. They are composed of a dense nucleus surrounded by a cloud of electrons, creating an overall compact structure. The size of an atom is determined by the interaction of its nucleus and electron cloud.
What will happen if field winding of attenuator gets open?
If the field winding of an attenuator gets open, the attenuator will not be able to control its attenuation level properly. This could result in erratic or no attenuation of the signal passing through the attenuator, leading to unpredictable behavior in the circuit or system it is a part of. Repair or replacement of the attenuator may be necessary to restore proper functioning.
What did democritus call the smallest piece of chalk after breaking it over?
He was using this to compare it to the smallest part of an element ... an atom which he called "atomos" from the Greek origin
How do tumble drier sheets can reduce static 'cling' in your clothes?
Dryer sheets contain ingredients that reduce the buildup of static electricity during the drying process. These ingredients help to neutralize the charges that cause clothes to stick together, resulting in reduced static cling. When the dryer sheet is warmed in the dryer, these ingredients are released and coat the clothes, making them less likely to generate static electricity.
What are the advantages of a heating pump?
Advantage of a heat pump would be if you are looking to keep a certain temperature this would be energy effective. But you would have to have a gas heater for a backup when the temperature got down below 60 due to the unit would freeze up. Some units do have a defrosting cycle but may need a backup depending where you live.
What gas is used in a vacuum tube?
Vacuum tubes are typically evacuated of gases to create a vacuum inside. However, some specialized vacuum tubes may use inert gases like argon or neon to improve performance or provide specific characteristics.
Is it possible for an electric blanket to make someone invisible?
I really don't think so. Nothing in science suggests that it could happen.
What are the phyisics principle in biomedical technology?
Some key physics principles in biomedical technology include imaging techniques like MRI and X-rays that leverage principles of electromagnetism and radiation, as well as the use of ultrasound based on principles of wave propagation. Additionally, principles of fluid dynamics are important in medical devices like dialysis machines and ventilators, which rely on the movement of fluids and gases. Finally, principles of mechanics and materials science are crucial in the design of prosthetics and implants to ensure their functionality and compatibility with the human body.
