Search the forum,

matter

In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, "matter" generally includes atoms and anything made up of them, and any particles (or combination of particles) that act as if they have both rest mass and volume. However it does not include massless particles such as photons, or other energy phenomena or waves such as light.: 21  Matter exists in various states (also known as phases). These include classical everyday phases such as solid, liquid, and gas – for example water exists as ice, liquid water, and gaseous steam – but other states are possible, including plasma, Bose–Einstein condensates, fermionic condensates, and quark–gluon plasma.Usually atoms can be imagined as a nucleus of protons and neutrons, and a surrounding "cloud" of orbiting electrons which "take up space". However this is only somewhat correct, because subatomic particles and their properties are governed by their quantum nature, which means they do not act as everyday objects appear to act – they can act like waves as well as particles and they do not have well-defined sizes or positions. In the Standard Model of particle physics, matter is not a fundamental concept because the elementary constituents of atoms are quantum entities which do not have an inherent "size" or "volume" in any everyday sense of the word. Due to the exclusion principle and other fundamental interactions, some "point particles" known as fermions (quarks, leptons), and many composites and atoms, are effectively forced to keep a distance from other particles under everyday conditions; this creates the property of matter which appears to us as matter taking up space.
For much of the history of the natural sciences people have contemplated the exact nature of matter. The idea that matter was built of discrete building blocks, the so-called particulate theory of matter, independently appeared in ancient Greece and ancient India among Buddhists, Hindus and Jains in 1st-millennium BC. Ancient philosophers who proposed the particulate theory of matter include Kanada (c. 6th–century BC or after), Leucippus (~490 BC) and Democritus (~470–380 BC).

View More On Wikipedia.org
  1. M

    Size of shower proformer in Wetroom - does size matter.

    Hi, I'm looking to change my downstairs bathroom to a Wetroom. It's currently an enclosed shower with a wooden floor on joists. I'm going to have the wooden floor remove and a Wetroom installed with a tiled floor. Please see picture of upstairs bathroom showing large tiles on the floor and...
  2. O

    A little bit of an advice / gas .....

    Hello guys, I was just thinking today about the following: If you get called out for land lord gas safety check and you find let’s say an ID cooker obviously you will do first your procedures but for instance if he doesn’t think it’s ID and he is not willing to pay you for the works what would...
  3. J

    Does pipe direction on system matter

    Installing 2 amptec electric boilers and have installed with increased pipe work as instructed. But do i need to install the flow coming from one direction and the return coming from the opposite. In the following link on page 9 it suggests that the flow and return come in from separate sides...
  4. M

    Need advice on a plumbing bill matter

    Hi I want some advice from the other side. I’m a customer who had a bathroom fitted summer ‘16. I asked for an estimate at the time and plumber ignored me just turned up for odd hours over a few days with his son and friend. They badly fitted the bathroom ruined my shower unit by sealing it all...
  5. G

    Prv on flow or return does it matter?

    Just wondered if anybody has an opinion as to why some manufacturers ask for the prv on a sealed system to be installed on the flow pipework rather than the return?
  6. S

    Battery drill, 18v or 14.4v, does it matter?

    What is the difference between an 18v or 14.4v drill, combi, driver. Does one battery last longer than the other? Is there more torque? Does more volts mean drill lasts longer, not overworking? Just not sure what to buy. Or any other drill options for that matter.
  7. S

    Positon of thermostat on the radiatot

    Hi does it matter if the thermostat is not on the inlet pipe but on the outlet pipe going to the next radiator because this is what I have in my house.
  8. H

    Seamus

    I am trying to save money whilst re-furbishing an old 3 Bed-Semi and am installing a new heating system where one did not exist. As I am planning the pipe layout and installation for the radiators via a downstairs Combi Boiler I can not find any info on the relevance of pipe runs. Does it matter...
  9. Leo21

    Neutrals in room stats

    I was always lead to beleive that putting neutrals, in room stats on combis or conventional systems, helped the stat perform better. But today the guy that was helping me reckons it nonsense. After reading the instructions again , I think he might have a point.
  10. B

    black or blue label...does it matter?

    I came across someone who was telling me that black label copper pipes are better than blue ones? i've never paid any attention to the colours..... anyone know if there is a difference between the 2?
  11. Robert Tyrrell

    E r g

    ERG Has anyone done any work for this company? I have attended 3 different jobs for them and although I was eventually paid for the first one (around two months after doing the work) I have still not been paid for the other two jobs despite several reminders being sent. I just get emails...
  12. A

    Do you have a minimum charge no matter what?

    Hi guys, Do you have a minimum charge for even the smallest of jobs? As you are running a business can you afford to say oh just give me £10.00? What i'm saying is if you charge £30ph (or whatever) would you still charge that for changing a tap washer that is straight forward and easy to get...
  13. S

    Washing machine hoses

    These usually come with one end straight and the other bent. Does anyone know which one goes to the back of the machine and why? Seemingly a simple question but interested to see how many differing opinions come back ;)
  14. P

    No Bypass On S Plan. Does It Matter?

    Just in the middle of replacing some rads (thanks to all on here for the advice re. concrete floors). Whilst my friend was helping drain down, he noticed that my s plan has no bypass, whilst his does. It's a standard vented system, and boiler is an old, but reliable Ideal Concord WRS. Should I...
  15. W

    Why would it matter?

    On another thread, his one: Worcher Bosch 24i System Boiler Someone stated, as the boiler wasn't working correctly: "It's been in the box for the last three years, there's a clue in there somewhere." My question is: why would it matter that the boiler in question has been stored in the...
  16. C

    Will it cause a problem if your gas pipe is too big?

    Does it matter if the gas pipe from the meter to a combi gas boiler is too big ie.28mm? What harm will it do?
  17. T

    Does wrong direction flow matter ?

    As some of you guys will know I have installed a water softener, trouble is the water is no different, even though this isolation valve the arrow is facing the wrong way this should still work shouldn't it or should I turn it round, I thought the direction of flow would only matter when...
  18. P

    Leaking loo

    I've got a problem with my loo leaking where the pipe from the cistern goes into the bowl. Having had a good look at it I can't see how I will get a good seal as the pipe from the cistern is at an angle to the hole into the bowl - as shown in the bottom diagram. Can anybody recommend a solution...
  19. T

    Mixer shower will not turn off! Water keeps on running no matter what setting!

    Hi I am having a problem with a Mira 415 mixer shower, it will turn on and gets hot (well fairly) but will not turn off at all. I have worked on one of these before and had a problem that it wasnt mixing properly, I stripped it down, re-assembled it, and got it mixing properly and turning off...
  20. A

    wiring an immersion heater thermostat

    Just a quick one chaps - there are 2 pins on the thermostat - one for the live the other for the short length of cable running from T. Does it matter which way round these are - there is no indication on the thermostat itself. many thanks dave
Creating content since 2001. Untold Media.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock