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What are the functions of a radar?

To detect, track, and sometimes identify objects via the emission of radio waves. Speed radar (like those used by police) can detect nearby objects and calculate their speed. Weather radar can detect the location of clouds and rain. Air traffic radar can detect and track unidentified flying objects. With the help a monopulse secondary surveillance radar, the radar system can identify the individual planes. Higher technology radars can detect and identify distant small objects with great precision.


Why is a plug live wire brown?

I've been trying to find a satisfactory answer to this through a casual search on the web and nothing jumps out at me immediately which amazes me!What idiot sitting on some "standards committee" somewhere thought that brown would be a good colour for a live wire?For starters brown is the colour of earth, so anyone knowing nothing about electricity would assume that brown is earth and that live must be that fancy coloured green and yellow wire with fatal consequences no doubt.Nature gives us natural warning and danger colours and they are typically vivid colours or unnatural contrasts - such as green and yellow in snakes! Red is also a classic danger colour and means "stop" on traffic lights etc. So...why is the live wire not red ?From my dim and distant past I can vaguely recall messing around with plugs and wires and in those days I remember the live wire in the UK as being red. So...what caused the change? I suspect some crazy dictate from faceless bureaucrats at the so called European Union lol.The only reason I can think of for this madness is that major circuits which feed directly into the mains, tend to have live as red and neutral as black (earth is green or green and yellow I think). As a means of distinguishing between the two, brown was chosen as a "shade" of red to mean live - though why not choose vivid orange? Why do we need to distinguish between the two types of circuits anyway?Unfortunately, I suspect that the real answer lies in some legal case where an idiot was working in building somewhere and mixed up the old style red live of a lighting circuit with a red live straight from the mains and frizzled themselves to death. The family sued because they were short of cash and the legal precendent was set that wiring should be re-labeled in colour (because - displaying warning signs near every electrical outlet was deemed unpractical...doh!)CommentI think you're probably correct in assuming that it was dreamt up by some idiot in the European Union of Socialist Republics!


Related Questions

Is a GSS alternative that is used when the decision frequency is low and the location of group is distant?

When decision frequency is low and the group is geographically dispersed, a Delphi method can be used as an alternative to a Group Support System (GSS). The Delphi method involves collecting individual input from experts through a series of questionnaires or surveys, allowing for anonymity and flexibility in participation without requiring face-to-face interaction. This method helps in reaching consensus and making decisions without the need for physical gatherings.


Is a gss alternative that is used when the decision frequency is low and the location of group members is distant?

A viable alternative to GSS in this scenario could be asynchronous communication tools like email, discussion boards, or collaboration platforms. These tools allow group members to contribute at their convenience and across different time zones. Additionally, video conferencing tools can be used for occasional synchronous meetings when needed.


When was Distant Mind Alternative created?

Distant Mind Alternative was created in 1999.


If the speed of sound depended on frequency how would distant music sound?

If the speed of sound depended on frequency, distant music would sound distorted. Higher frequency sounds would travel faster than lower frequency sounds, causing a shift in the relative timing of different frequencies and resulting in a jumbled and unintelligible sound.


Can astronomers tell what a distant object is made of?

spectrocity...absorption of select frequency of light ie spectrocity


Why does reverend Sykes voice seem distant after the decision even though he is standing next to scout?

Reverend Sykes' voice seems distant to Scout after the decision because she is lost in her own thoughts and emotions. She is grappling with the implications of the trial and the injustice she witnessed, causing her to be mentally preoccupied and distant from what is happening around her.


How do you understand mouth movement or words uttered at a near distant location?

Read the persons lips.


Where is the neucleus in an atom?

center of massphysical centerequal distant from valence shellif the electrons were planets, at the location of the sunspherical center


Who was Pluto it naned after?

Pluto was named after the Roman god of the underworld. It was considered a fitting name due to its dark and distant location in the solar system. However, the decision to classify Pluto as a dwarf planet in 2006 has led to some debate over its official status.


What is a designated survivor?

A designated survivor is a member of the United States Cabinet who needs to be in a distant and undisclosed location when the President and other top leaders are gathered in a single location together.


A supernova explodes in a distant galaxy a sudden rise in visible light and other forms of electromagnetic radiation are visible Is this evidence to support that light is independent of frequency?

It's evidence for what you meant to say but didn't ... that the speed of light isindependent of frequency.


What is it called when the distant between successive crest waves?

the distance between the crests of two succesive waves is called the wavelength. It is directly related to the frequency of the wave