Consumer Electronics

Well you mean "when was iron found "not "when was iron invented" People dugged it up 5000 thousand years ago from now.Iron - or the discovery of how to make iron was - unlike other metals - was done by the Hittites who came from c. Turkey / northern Mesopotamia. As far as scientists / archaeologists can determine the discovery of iron happened only once in human history unlike copper or bronze. This may seem unlikely but given the fact that metal working as a whole was unknown (generally accepted to be the case) at all in the American continents, then only one origin for iron working itself is not unreasonable. Given that humans lived in the Americas for 15,000 years but did not work metal suggests that the discovery / ability to work metal (of what every sort) was something that happened rarely in human history and was not something that was 'bound' to happen. The surprise perhaps is that metal working was ever discovered ....

Otis

A computer is not a robot. Many robots will have different types of computers in them to help them operate properly, i.e. in car manufacturing.

The typical estimated life of a Lithium-Ion battery is about two to three years or 300 to 500 charge cycles, whichever occurs first. One charge cycle is a period of use from fully charged, to fully discharged, and fully recharged again. Use a two to three year life expectancy for batteries that do not run through complete charge cycles.

Rechargeable Lithium-Ion batteries have a limited life and will gradually lose their capacity to hold a charge. This loss of capacity (aging) is irreversible. As the battery loses capacity, the length of time it will power the product (run time) decreases.

Electric current, but the voltage required depends on the electrical standards of the country you are in.

So when you're on the toilet people can't see you.

No they are not real they are just animated with effects.

A half century or fifty years

Negative ions have an excess of electrons while positive ions have a deficiency of electrons.

it was invented by Alexandre Godefy in 1890 in France.

Current symbol I =voltage/resesistance I=V/R for direct current (dc) and for a resistive load in alternating current (ac)

Variable resistor is an resistor that can change its resistance manually, by rotating a handle or a screw.

Normally, there won't be any problem at all. Most power supplies will run on either frequency.

However, when moving from one region to another, always check the voltage requirements of the equipment against the new region's mains voltage. Europe uses 230V for example while North America uses 110V. A lot of modern equipment has power supplies that will accept a wide range of input voltages but it is imperative that you check before connecting. All equipment should have an information label that sets out voltage requirements.

There are two basic types of full-wave rectifier. The older type consists of two rectifier diodes,(diodes). The two anodes are strapped together giving the +ve ouyput;the two cathodes are connected to opposite sides of the transformer secondary. This arrangement has the advantage of needing only two diodes, but the disadvantage of needing a centre-tapped secondary on the transformer which provides the -ve output. The newer type is a bridge rectifier. It consists of four diodes in a ring configuration. diode 1 has its anode connected to the +ve out and cathode to side a of transformer. diode 2 has its anode connected to the +ve out and cathode to side b of transformer. diode 3 has anode to side a and cathode to -ve out. diode 4 has anode to side b and cathode to -ve out. This arrangement has the advantage of not needing a centre tap on transformer secondary. The disadvantage of needing four diodes instead of two is moot nowadays because solid-state diodes are very low cost.

It depends on the model. The AT-400 (which is rarely found in commercial use) can cost up to $75,000 per unit. The less advanced AT-250 (which can be found in most grocery stores and discount tire outlets) can be purchased for under $10,000 depending on the country it was produced in.

The newer i-phones have this function on a app.

Advantage: a fuse is guaranteed to pop only when too many amps are pulled, unlike a circuit breaker that may be "accidentally" turned off by some practical joker.

Disadvantage: You must have spares on hand (or go buy them when needed) unlike a circuit breaker which can be reset over and over.

Wireless speakers pick up the sound sent by a low powered FM transmitter to an antenna on the speaker. The sound is then heard though the system. These speakers must either be battery powered or plugged into a power source.

The average salary of a machinist in the United States is roughly 49,000 dollars. This can go up to 70,000 dollars if the machinist has been doing the job for several years.

Fifty five percent

The easiest way to do this is to record over it, but there will still be residual audio (or video if a VT) from the previous recording. If you wish to erase a confidential recording, I would recommend a Tape Degausser. This emits a rapidly alternating electromagnetic field which demagnetised the tape and thus erases it, in much the same way the degauss feature works to demagnetise components in CRT monitors. However, Tape Degaussers can be very expensive.

If it's important it be erased, with no trace and minimal cost - throw it on the fire, but you'll be unable to re use it afterwards.

Factors that effect resistance are: # Heat- At a higher temperature their will be more resistance as the atoms within the wire begin to swell and make it harder for the current to pass through the wire; this causes more resistance. # Length- As the length increases so does the resistance. This is because there is a larger space for the electrons to jump across and more atoms for them to get through to complete the circuit. # Cross-Sectional area- As the CS area increases the resistance decreases as there are more places for a greater current to travel through. # Material- Different materials have different densities. The denser a material the higher the resistance.

I have never runinto a store that sells laser pointers. although I know some internet locations that will get you rather decent ones. You can get some from eBay at super low prices, however I've been ripped off twice from that site.