answersLogoWhite

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

Is a Fresnel light the same as a Tungsten light and if so how?

No. A Tungsten light is an incandescent lamp with its filament made from tungsten.

Strictly speaking there is no such thing as a Fresnel light. There is a Fresnel lens, which is a lens whose surface has concentric ridges rather than a smooth surface like a normal lens. Although fairly useless for looking at things, it is cheaper, smaller and lighter way of concentrating the output of a lamp into a narrow beam. These are often found in lighthouses.

What is volume imperfections?

Volume imperfections refer to irregularities or inconsistencies in the volume of a material or substance. This can include variations in density, air pockets, or inconsistencies in the material's structure. These imperfections can affect the material's strength, durability, or appearance.

What would happen if you dont have clocks?

you would be late for every thing in the world. like you have to go to work but you don't have a clock so how are you appose to tell when you have to go.

Mankind survived for thousands of years without clocks. There are other way to estimate time.

How a POT line work?

A POT line (plain old telephone line) is a twisted pair of copper wires that connects a traditional telephone -- aka "landline", aka "hard-wired phone" -- to the telephone company POP building ("point of presence").

Many communication systems, such as some kinds of power-over-Ethernet, use one pair of wires to carry power out, one pair of wires to carry data out, and one pair of wires to carry data in -- 3 separate pairs of wires.

The POT system somehow combines all three functions onto a single pair of wires.

A POT line uses the "bias-T" technique with a an inductor to combine and split data and power at the ends of the line. (Sometimes a gyrator circuit simulating an inductor is used at the POP end).

A POT line uses "echo-cancelling" techniques to combine and split incoming and outgoing data lines at the POP end of the line.

As water is cooled what happens to the density?

As water is cooled, its density increases until it reaches its maximum density at 4 degrees Celsius. Below 4 degrees Celsius, water begins to expand as it freezes, which is why ice is less dense than liquid water.

How do scientists use measuring?

Scientist use measuring to determine the effects of an action. They measure the property of the object, process or substance before the action and after. The difference in the two measurements reveals some information which they use to validate hypotheses.

How is CO2 dry cleaning better than PERC dry cleaning?

PERC dry cleaning produces percholorethylene, PCE, tetrachloroethylene, and tetrachloroethene which has been identified as a toxic contaminant and potential human carcinogen. CO2 does not produce these chemicals it is cleaner and greener.

Can light be transferred across empty space?

Yes. Electromagnetic waves, like light, can travel through a vacuum, they need no medium in order to be transmitted. Unlike sound waves, which are compression waves what rely on matter in order to be transmitted.

How do you make a slid show on word?

To create a slideshow in Word, you can insert images onto separate pages and use transitions to move between them. Go to the "Insert" tab, click on "Pictures" to add images, then go to the "Transitions" tab to apply transition effects between slides. You can also customize the slideshow by adjusting the layout and design of each slide.

How technology changed the medicine?

Technology has revolutionized medicine by enabling advancements such as telemedicine for remote healthcare access, electronic health records for efficient data management, and medical imaging tools for accurate diagnosis. Additionally, technologies like artificial intelligence are being used to analyze large datasets and develop personalized treatment plans. Overall, technology has significantly improved patient care, diagnosis, and treatment outcomes in the field of medicine.

Is frequency measured in Hertz?

Yes, frequency is measured in Hertz (Hz). Hertz represents the number of cycles per second of a periodic wave, such as sound or electromagnetic waves.

What is the limitations of a microphone?

Some limitations of a microphone include sensitivity to background noise, distortion at high volume levels, and directionality in capturing sound. Additionally, the frequency response of a microphone may not capture a full range of audio frequencies accurately.

How does QCIF CIF 2CIF DCIF 4CIF and D1 compare to each other?

These terms refer to different video resolutions. QCIF (176x144) is the lowest resolution, followed by CIF (352x288), 2CIF (704x288), DCIF (528x384), 4CIF (704x576), and D1 (720x576). 4CIF and D1 are commonly used for high-definition video, while QCIF is typically used for low-bandwidth applications.

What is the mechanism of digitized sound?

A chip called an Analogue to digital converter (ADC) is used to convert sound waves in the form of analogue electrical impulses, into numeric values which can then be processed by the computer.

Conversely, a chip called a digital to analog converter (DAC) does the reverse.

The quality of the sound recorded is goverend by two constants , this is the sample rate and the bit depth.

The sample rate is the number of samples of a sound taken per second. For instance a CD is sampled at 44kHz or 44,000 samples per second.

The bit depth describes the maximum value of a number used to store the amplitude of a sound. The greater this value the greater the change between silence and the maximum sound value stores or greater dynamic resolution. In the case of CD's 16 bit or a value between 0 and 65535.

How can messure bolt diameter?

#1 Simplest way is to buy a bolt gauge from a hardware store or online.

Example:

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=39240&xcamp=google&utm_source=googlebase&utm_medium=cpc&zmam=33951326&zmas=12&zmac=112&zmap=39240

#2 Next method is to see if you or someone you know ever purchased an assortment of nuts and bolts from a hardware store that has labeled drawers. Take nut from the labeled drawer and match it up.

#3 You can make your own bolt gauge if you own a set of drill bits. Drill holes in sheet metal or wood and label the holes. Push the bolt in the holes till you find a fit. This will not give you the thread pitch though which you usually need for a mating nut.

#4 If you have a set of wrenches that are the size of the bolt threads match them up until you find a fit. You probably do not have wrenches that small though. I assume it is a small bolt.

#5 Use calipers to gauge the diameter and place the gauge reading on an accurate ruler. This will not give you the thread pitch either.

Why does Cotton dry slow?

Cotton fibers are highly absorbent, which means they can hold a lot of water. This can contribute to cotton drying slowly because the water needs time to evaporate out of the fibers. Additionally, the tight weave of cotton fabrics can trap moisture, further slowing down the drying process.

What is the function of a light dependent resistor?

The resistance of LDR increases when light is not available (or is limited). And the resistance drops when Light is abundant.

This principle can be used in proximity detectors where one or more light source(s) is/are active. When a person / object comes in proximity of the source, the light gets reflected from the object-surface & can now be received by LDR. So due to proximity of the object, resistance of LDR changes - this can be used to trigger different actions like open the door, trigger a motor. Fire an alarm. etc.
Resistance of LDR varies according to intensity of incident light over it,It is used in street light to detect day/night and turn on/off the street light automatically

What battery runs out faster energizer or duracell?

The battery life of Energizer and Duracell batteries can vary depending on factors such as the device being used and how it is being used. Both brands are known for their high-quality batteries with long-lasting power. It's not accurate to say one brand always runs out faster than the other.

Two measuremnets to rate capacity of UPS?

1) Rated Protection of the UPS

2) Run Time.

Rated protection is usually in KVA or VA (KilliVolt amps for very large UPS or Volt Amps for smaller UPS). This is because UPS typically have multiple outputs like 120V 240V and possibly 12VDC. Some only list WATTS. This assumes the UPS will have only one Voltage output so the Volts X Amps=Watts was already calculated.

There is also something called a "Power Factor" that comes in to play. For computers it is ~60% which means if you are backing up a PC it will take more power than you think or the UPS will run for less time than you think because of the power factor.

Runtime is usually presented in a chart since it will vary based on the load it is supporting.

A battery has a rated Amp/Hour capacity. Amps per hour. You use a fraction of this over time until there is no more energy.

Using Ohms Law you can determine the Amps from Watts or KVA/VA.

P=IxE or Power ( watts) = Current( amps) x Electrical energy ( Volts)

So I (amps) = P(watts) / E ( volts) .

There are other factors like the battery charge level, ambient temperature and losses in cabling etc, that affect the run time in amp hours.

What is the technical difference between draw bar and ball mount?

A drawbar is typically a solid piece of metal that extends from the receiver hitch on a vehicle to provide a connection point for towing trailers. A ball mount is an assembly that includes a shank, platform, and a hitch ball for towing purposes, and can be interchangeable to accommodate different trailer heights. Essentially, the drawbar is the structural piece that fits into the receiver hitch, while the ball mount includes the ball for coupling the trailer.

Describe how polymers are built and how they are broken down?

To Break a polymer water is used to break the inonic bonds in a process know as the hydrolosis effect. RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM RANDOM.

The velocity of light is 3.00 which is equal to what?

This question does not make sense.

Part (1) "The velocity of light is 3.00" is a statement within the question following

Part (2) "which is equal" is again a statement.

Part (3) "to what?" is the question.

So if I ask, "The velocity to what?" and replace the word "velocity" with "light" to define it better, I get, "The light to what?" and substitute the value of light with the given in Part (1) and add the second statement given in Part (2), I get, "3.00 is equal to what?" Hello? is what I want to ask.

Perhaps reversing the original question will enlighten: "What is equal to the velocity of light...which is 3.00?"

Wa-la. This was a trick question. The answer in not only within the question itself, but also happens to correlate to the number of minutes wasted answering this...this...