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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

What is the relationship between physics mathematics and technology?

Physics is the fundamental science concerned with measuring and counting of natural phenomena.

Mathematics is a subject concerned with the representation and manipulation of numbers, and their more complex products such as graphs, spreadsheets and so on.

Technology is the engineering application of ideas. The spear, the hatchet, the steam engine, the computer, the record player are all examples of technology.

What do you use radiation for?

-- seeing things

-- warming my hands by the fire

-- working on my tan

-- watching the 10:00 news on TV

-- re-heating the meat loaf

-- attacking certain types of tumors

-- taking a snapshot

-- getting a CT scan

-- getting an MRI

-- making a cellphone call

-- checking my e-mail from the other room

-- using my GPS in the car

-- using its headlights to see things at night

-- listening to NPR while I'm driving it

-- opening the garage without getting out of it

-- measuring trees with my laser rangefinder

-- getting checked out with dental or chest X-rays

-- playing outside with my RC car

-- walking around the house talking on the cordless phone

Example of malleability?

One example of malleability is when a metal like gold can be easily hammered into thin sheets or shaped into different forms without breaking. This property allows gold to be used in jewelry making and other applications where it needs to be shaped or molded.

What happens if the proximity sensor stays on all the time?

That completely depends on the design but it'll eventually run out of power. Depending on whether it's detecting or not detecting it might run out of power quicker because it's changing states or one of the states drains more power than the other.

What is resistivity and what factor does it depend?

Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) quantifies how strongly a given material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of electric charge. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is theohm⋅metre (Ω⋅m)

It defined as resistance offerde by a unit length and cross section area conductor.

It depends on material used.

it depends on relexation time and temperature.

What is photovoltaics solar electricity or PV?

Photovoltaics (PV) refers to the technology used to convert sunlight directly into electricity using solar cells. Here’s an overview of how a solar PV module works and its significance:

• Basic Principle: Solar PV modules consist of numerous solar cells made from semiconductor materials, typically silicon. When sunlight strikes these cells, it excites electrons, creating an electric current through the photovoltaic effect. This direct current (DC) electricity is then converted into alternating current (AC) using an inverter, making it usable for homes, businesses, and the grid.

• Components of a Solar PV Module: A typical solar PV module includes solar cells, an encapsulating material to protect the cells, a transparent front cover (usually glass), a backing material, and a frame to provide structural support. These components work together to maximize light absorption and convert it into electricity efficiently.

• Advantages of Solar PV: Solar PV modules offer numerous benefits, including the generation of clean, renewable energy, reducing reliance on fossil fuels, and decreasing greenhouse gas emissions. They are relatively easy to install and require minimal maintenance. Additionally, solar PV systems can be scaled to meet various energy needs, from small residential installations to large commercial solar farms.

• Applications: Solar PV technology is used in various applications, including residential rooftop systems, commercial installations, solar farms, and off-grid power solutions. It is also employed in specialized applications like powering satellites and remote sensing equipment.

Photovoltaics represents a crucial technology in the transition to sustainable energy. By harnessing the power of the sun, solar PV modules provide a reliable and environmentally friendly source of electricity.

What are the disadvantages to the emerging technology of the Phosforce flashlight?

Some disadvantages to the emerging technology of the Phosforce flashlight are: The price! First of all you would need a high power laser which in itself can be quite expensive. Second, you need the phosphoric lens. Together, these are way more expensive than a regular flashlight. Also, a high power laser can be dangerous. They can do severe damage to eyes and cause burns when handled improperly.

What activities does information system perform?

Information System (IS) refers to a system of people, data records and activities that process the data and information in an organization, and it includes the organization's manual and automated processes. In a narrow sense, the term information system (or computer-based information system) refers to the specific application software that is used to store data records in a computer system and automates some of the information-processing activities of the organization. There are various types of information systems, for example: transaction processing systems, decision support systems, knowledge management systems, database management systems, and office information systems.

What is pros and corns of dpsk?

Pros of differential phase shift keying (DPSK) include improved noise immunity compared to regular phase shift keying (PSK) because it changes signal phase differentially rather than absolutely. Cons include more complex demodulation due to the need to compare the current and previous signal phases for decoding. Additionally, DPSK may have higher bit error rates in certain scenarios.

How much current in amps flows through a circuit with a 100 resistance?

You don't have enough information in your question, you need to include the voltage as well. One relevant equation is V = I * R where V: Voltage, I: Amps, and R: Resistance. When you have the voltage divide the Ohm resistance into that and you'll get your amps.

What is the balancedequation for Ag2S Ag S8?

The balanced equation for the reaction between Ag₂S and O₂ to produce Ag and S₈ is:

2Ag₂S + 11O₂ → 2Ag + 4SO₂

How do you make a bulletproof fabric?

Body armor is quite expensive, no question. However it's demonstrated to work, time and again. Kevlar cloth runs about $40 a yard, and I'm not sure that even multiple layers would work---the armor I've seen uses what appears to be Kevlar plates, not cloth.

A question you have to ask yourself is what your life is worth. Are you ready to try to make your own life-saving device which may or may not work when the time comes, in order to save a few hundred dollars---or even a thousand dollars?

If bitrate is high in mp3 whether volume in high or low?

It won't change the volume of the music majorly but it's the base and sound quality that makes a difference. if you have a low bit rate it might be scratchy or wont sound a s good on high quality speakers.

How did the telephone get its name?

The word "telephone" comes from two Greek words, "tele" meaning distant and "phone" meaning sound or voice. When combined, it refers to a device that transmits sound over a distance, which is the basic function of a telephone.

How long will it take to produce hydrogen?

Since hydrogen is natural occurring process and chemical you cannot produce hydrogen without there even being a trace of hydrogen already in another substance.

So according to wikipedia here is part of your answer:

H2 is produced in chemistry and biology laboratories, often as a by-product of other reactions; in industry for the hydrogenation of unsaturated substrates; and in nature as a means of expelling reducing equivalents in biochemical reactions.

Laboratory

In the laboratory, H2 is usually prepared by the reaction of acids on metals such as zinc with Kipp's apparatus. Zn + 2 H+ → Zn2+ + H2

Aluminium can also produce H2 upon treatment with bases: 2 Al + 6 H2O + 2 OH− → 2 Al(OH)4− + 3 H2

The electrolysis of water is a simple method of producing hydrogen. A low voltage current is run through the water, and gaseous oxygen forms at the anode while gaseous hydrogen forms at the cathode. Typically the cathode is made from platinum or another inert metal when producing hydrogen for storage. If, however, the gas is to be burnt on site, oxygen is desirable to assist the combustion, and so both electrodes would be made from inert metals. (Iron, for instance, would oxidize, and thus decrease the amount of oxygen given off.) The theoretical maximum efficiency (electricity used vs. energetic value of hydrogen produced) is between 80-94%. 2H2O(aq) → 2H2(g) + O2(g)

In 2007, it was discovered that an alloy of aluminum and gallium in pellet form added to water could be used to generate hydrogen. The process also creates alumina, but the expensive gallium, which prevents the formation of an oxide skin on the pellets, can be re-used. This has important potential implications for a hydrogen economy, since hydrogen can be produced on-site and does not need to be transported.

The other part ot your question is: almost instantly when using the methods above

What technology does a sonographer use to produce images of inside the body?

Sonographers use ultrasound sonography to produce such images. "Ultrasound" refers to sound waves with frequencies (pitch) above the range of human hearing. The system works by emitting sound waves and detecting them when they are reflected back. This is analogous to the process of viewing an object illuminated by a flashlight; light and sound are both waves and can be detected with the appropriate instruments.

What is vertical and horizontal polarization?

Light acts like both a particle and a wave. These particle-waves are oriented in random directions. Polarisation filters basically filter out the randomly oriented waves, and ensure that only light that is 'polarized' in a certain direction can pass through.

Horizontal polarisation is when the light waves are oriented horizontally, and vertical is when the waves are vertical. The same princaple applies to the whole EM spectrum.

Why is necessary to classify a substance?

Well, substances are generally in Chemistry. It is necessary to classify a substance due to the initial fact that the chemical name could have two meanings; one may have a capital letter and the other may not

Is potassium gold cyanide hygroscopic?

In crystalline form it's non-hygroscopic, or has only slight hygroscopicity. In powder form it is, yes.

What is the colour temperature and wavelength of incandescent lamp?

An incandescent lamp's light has a color temperature between '2700 to 3300 K".

Such a temperature approximates an ideal black body radiator, and it could have an effect of "warm". If a neodymium coating is used, the color ranges from yellow to red. After a period of use, the color turns into white and then to blue. Blue and black colors are at the end of the visible wavelength.

What is charging out procedure?

Charging out is the process of invoicing or billing a client for services rendered or products provided. This involves recording the details of the transaction, including the amount due and any terms of payment, and then sending the invoice to the client for payment. It is an important step in the financial management of a business to ensure timely and accurate revenue recognition.

Why does the closed lid of thermal mug keeps liquid hotter for longer?

The closed lid of a thermal mug helps to trap heat and prevent it from escaping, thus maintaining the temperature of the liquid for a longer period. It creates a barrier against heat loss through convection and evaporation, keeping the contents hot.

What was the light bulb like when it was first invented?

The design of the earliest light bulbs was very similar to the design of light bulbs that are still in use today. The only major innovation that has happened since they were first invented is that some now have frosted glass to cut down on glare.