answersLogoWhite

0

📱

Consumer Electronics

Ask questions here about the electronics you use every day: from phones and computers to kitchen appliances and radios.

4,952 Questions

How did the phonograph change the world?

Jazz as a musical movement came about in the early 20th Century, first originating as "The Blues", which took influences from African American work songs, field hollers, spirituals, gospels, and African oral musical tradition, forming them into a new, call-and-response style of music that became one of the very foundations of popular music today. From the early blues roots, Jazz evolved into a myriad of other styles, such as Big Bang Swing, Bebop, Modal, Latin, Free Jazz, and Fusion. Not only did Jazz create and influence so many different types of music, but it also opened the doors for musicians who were not classically trained to show their stuff and be heard. The rich freedom provided by solo improvisation is a feeling unlike most, especially when you're surrounded by great musicians. As perfectly said in the comedy series The Spoils Before Dying: "Ah, the sanctuary of Jazz. The safety in no safety. The music lived in life while life is happening. Jazz is life's adventure set to rhythm."

How did the scar predator have a alien embryo in Alien vs predator?

when hes marking him self this face huger jumps out and puts the embryo in the predator at the end you see the alien busting out of the chest

and it is not a normal alien its a PREDALIEN

How does a flashlight work?

A flashlight has a power source (usually ordinary batteries), a light source of some sort (a light bulb or LED, for example), and some electrical wiring to connect them, with a switch to turn it on and off. The power source makes the light source give off light.

What are ESD precautions?

ESD stands for Electrostatic Discharge. You should avoid the possibility of static building up when working with PC components by ensuring that you are grounded at all times. You can do this by using a special anti-static wristband, which is available very cheaply. Alternatively, touch the chassis of your PC case often, or hold the chassis with one hand while touching any sensitive components.

Can speakers connect to a VGA port?

No. VGA is for the monitor. Speakers connect to the audio output using a mini-phone plug. On most machines, both the plug and the jack into which it goes are colored light green.

Does the glow of bulb depend on current or voltage?

Since the bulb has a constant resistance, increasing the voltage will increase the current which will increase the brightness until the bulb blows in a flash of light.

Ohm's Law governs this process where Volts = Current x Resistance.

Another Answer Incandescent lamps do not have a constant resistance, as their resistance increases significantly with temperature. In fact, the 'hot resistance' of a lamp filament is around 10-18 times higher than its 'cold resistance'. The temperature increase, of course, is due to the current passing through the filament. This means incandescent lamps do notobey Ohm's Law and are, thus described as being 'non-ohmic' or 'non-linear'. However, to answer your question directly, the rated power of a lamp only occurs at the lamp's ratedvoltage. Even a small reduction in voltage will result in a significant loss of power and, thus, brightness. So, in this sense, a lamp's brightness is determined by the voltage applied across its filament.

How do You discard an old computer?

Well many have been there and the answer is responsibly. Your first option is to throw it away in the plain garbage, but it is irresposible and hurts the environment, and it may be illeagel in your state so that's out. The next way is recycling but you may have to pay a fee. You could trade it in to a store like Computer Renaissance and they will pull the good stuff like the RAM out and recycle the rest for free, if it is new enough you may get credit towards the purchase of othe computer equipment. My advice is is if it has Windows 98 SE or better take it to a private school and donate it since they are not federally funded and so they can only afford Windows 95 computers.

Why is apple a success?

Key Success Factors

Core Strengths

Apple has numerous internal strengths that make it a successful and

competitive company. For one, Apple has a powerful footing in the personal

computer market by being "different" with its innovative style and ease of use.

Its operating system is developed in house, leaving it free from the tangles of

the dominant Microsoft operating systems. This gives apple a very large degree

of control over its product in the physical appearance, specifications, and overall

usability. Apple does all this while keeping its Macintosh computers compatible

with existing PC computers. Additionally, Apple fosters a research intensive

office environment and is constantly releasing products with the current trends

and styles as seen through its latest iPod and Mac mini. This makes Apple one

of the biggest innovators in the computer and portable music industries, being

first to bring new and creative ideas to the market.

Core Weaknesses

Due to their research intensive nature, Apple has high R&D costs, which

means that Apple is far less cost effective in a very saturated market. While they

currently hold 90% of the portable music market, Apple is constantly relying on

innovation to keep it ahead, putting the company in a risky position if its R&D

does not come through.

Moreover, Apple has a hard time selling the Mac

computer to many customers do to the perception that the Macintosh is

incompatible with other PCs and software. In other words, customers get scared

of an operating system that looks different then windows and assume it doesn't

work the same. While this is not true, it hinders the ability of Apple to steal

away existing PC users to grow its market share.

Finally, Apple has problems

with some customers due to the high prices of many of their products. While

this has not hindered their sales in the portable music market yet, it can be

traced to problems within their computer market sales.

Market Opportunities

Within the industries that Apple competes there are numerous

opportunities for increased market share and growth. Since Apple is already

recognized as one of the main leaders in the portable music market they have

the ability to further increase their company image and quality

image reputation. This will allow Apple to maintain their already

well established clientele as well as attract new customers. Within

the personal computer market Apple is expected to sustain

substantial market share gains in 2005 because customers are

awaiting the launch of Windows Longhorn for Microsoft.

On the portable music side of things, it is speculated that if Apple were to

release a flash-memory based mp3 player that its music business

would be worth close to 5 billion by 2006.

As a final point, many speculate that Apple's entire line of Macintosh computers will gain market share due to the halo effect of the iPod.

Market Threats

There are many potential threats that Apple faces everyday. The primary threat that they face is the rapid advancement in technology. Since most people judge the computer on the speed (GHz) of its CPU, Apple has had a hard time with customers considering the Macintosh inferior in

speed to the PC. Although, recently the new Macintosh

computers have begun using 64bit technology as opposed to the PC which is still primarily using 32bit technology.

This has given Apple a slight edge to their

speed problem. Therefore, Apple must make sure that

they stay up-to-date and on the cutting edge of

advancements and innovations. One slip in their R&D

department and Apple could lose an enormous amount of their market share.

One final note is the threat of Napster, Apple's primary competitor to its iTunes

Provided by Apple.com

iPod Shuffler Flash Player Image property of Napster.com

music service. Napster has begun aggressively marketing its new service which

allows unlimited music downloads which are "rented" to the mp3 unit while the

subscription is active. This service, costing only $14.95 a month, is the first

serious challenge to iTunes 99 cent per song download business strategy.

Whether or not Napster will effectively unseat Apple is yet to be seen, but shows

the vulnerability of Apple's portable music market share.

Competitive Strategy Analysis

In such a highly competitive industry where superior quality and brand

image are key success factors for a computer company, it is necessary for

computer companies to become cost leaders or differentiate themselves by

offering a unique product. Apple has become known as a computer company

that has innovative and stylish computers and music playe

What are opinions on whether or not mature video games should be banned?

I think they shouldn't be banned because they have 18 year olds playing them. In my opinion, a complete ban would be very out of order and is very unlikely to happen. As mentioned above, they are designed for people of a certain age-group and should not be sold to people younger than the age-group they are designed for. If a child buys a rating 18 game somehow, it is up to the parents of the child to remove it from their child's possession and to contact the police for a violation of the law. A total ban would ruin it for those over the legal age to play the game...

Should kids get cell phones?

There is a talk about mobiles are not safe. People say that if the child is under 16 and has a mobile they might get brain cancer. If your child is begging for a phone wait till there in secondary school. Apparently everyone at high school has one and you don't want them to feel left out. In till they are 16 say that he/she can only use it for short calls and texting. That's what i recommend.

Juliet Schor, a professor of sociology at Boston College in the US and a leading researcher on children and consumerism, claims that children's 'involvement in consumer culture causes dysfunction in the forms of depression, anxiety, low self-esteem, and psychosomatic complaints'.

What can electrical shock cause to you?

we do get electric shocks as when we hold a peice of electric wire in our hands and when the electricity switched on, the electrons get transferred through us in the free air. if we hold a peice of cutted wire in both our hands (one hand holding one hand and the other holding another end ) and we complete the circuit and switch the electricity on, nothing will happen but at the point where we leave the wire from our hands, we will get n electric shock.

When Did Black and White TV start?

Ignoring all the pioneering work and various inventors of TV, it was in 1936, 2nd November. The BBC at Alexandra palace, transmitted the first regular broadcast, designed to be picked up by the public, using EMI's electronic scanning system.

It was broadcast alternately with Baird's mechanical system, which was more black and orange than black and white.

This first black and white TV broadcast, was on the 405 line system at VHF frequenies.

What does MIDI stand for?

MIDI is abbreviated for Musical Instrument Digital Interface. The digital standard for connecting computers, musical instruments, and synthesizers. A compression format for encoding music. Abbreviated MIDI. It is written in all capital letters.
Musical Instrument Digital Interface

Disadvantage of franking machine?

The disadvantage is - it's easy to abuse it ! Some companies allow anyone to use their franking machine - meaning that any employee can frank personal mail, thus avoiding paying for the postage. Franking machines are 'loaded' with pre-paid credit. Once the machine is 'primed' - anyone can feed letters through it - and use the credit until it's exhausted. That's why most franking machines are locked away until the end of the working day, and one person franks all the outgoing mail.

Who invented the Microwave and what year was it invented?

Who invented the microwave? Huh?

That's like asking who invented water or sunshine.

Microwaves are radio waves with wavelengths that range from about one meter to as short as one millimeter, with frequencies between from 300 MHz to 300 GHz.

If you're asking who invented the microwave oven, it was Dr Perry Spencer, after accidentally discovering that microwaves can heat food. In 1945 he was an engineer working for Raytheon, working on a radar set that used high power microwaves, and noticed the Mr Goodbar in his pocket started to melt. The first food to be purposely cooked by microwaves was popcorn, and later on an egg, which exploded in the face of someone helping him. He later fed microwaves from a magnetron into into a metal box and saw that it heated food rapidly.

Raytheon filed a patent for the microwave cooking process on October 8, 1945.

What is the best type of rechargable batteries?

If you're talking about battery sizes like AAA, AA, C, D and 9V, Ni-MH (Nickel-Metal Hydride) is the most common one, and as far as I know the only type in these sizes other than the now obsolete Ni-Cd (Nickel-Cadmium). Li-ion (Lithium ion) batteries have also been introduced in these sizes, but they have a significantly higher voltage and thus are not usable on regular battery-powered devices out of the box.

The highest capacities for Ni-MH based batteries are something like this:

AAA 1000 mAh

AA 2900 mAh

C 5000 mAh

D 8000 mAh

There are also newly-developed Ni-MH batteries with low self-discharge (LSD) like Panasonic Infinium and Sanyo Eneloop. These kind of batteries are particularly suitable for low consumption devices like clocks and remote controls, but they're also good for devices drawing high currents such as digital cameras. They apparently used to have a lower capacity than ordinary Ni-MH batteries, but currently the two types are pretty much on par. The LSD batteries can be marketed as "pre-charged" or "ready-to-use".

How are laser rays used on burning process of CD and DVD?

CD-R's use a sort of fluid in them that reflect light but don't after it is burned. A computer uses a code of 1's and 0's so the laser light from a CD ROM is bounced of by the reflection and is counted as a 1 and when it is not bounced back is a 0, so the laser burns the fluid.

What did percy Spencer invented?

The microwave oven and a new type of magnetron. For more information go to www.invent.org/Hall_Of_Fame/13.html

Why is the reverse saturation current of germanium diode more than silicon?

Germanium has four number of shells while Silicon has three number of shell. therefore for germanium less energy is required to move the electron from valence band to conduction band if compared to silicon.

So at room temperature for germanium their are more number of electrons present in conduction bond hence more number of holes present in the valence energy band. Due to movement of holes reverse saturation current is produced.

Their is more number of hole movement in germanium comparatively therefore reverse saturation current is more than silicon for germanium.

You may refer to Electronic Devices and Circuits by Allen Mottershead

Regards,

Zain Ijaz

UCTI, Malaysia

Mechatronic Engineer.

Which is better the 6600 mah or 4400 mah li-ion battery for a laptop?

It depends on the voltage. WH = Watt Henry, mAH = milliamp Henry, watts = amps * volts and milliamps= 1000 * amps. Thus the conversion is:

mAH = 1000 * WH / V,

where V is the voltage.

I'm looking at the battery for my Dell Studio and it's rated 85WH and 11.1V. So it's 1000 * 85 / 11.1 = 7658 mAH, so in this case 85WH is better than 6600 maH.

If we solve 1000 * 85 / V = 6600, we get V = 12.9. When converting from WH, the bigger the voltage the lower the mAH. So for voltages bigger than 12.9 V, 6600mAH is better than 85WH.

Hope this helps.