BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:Australia/Sydney BEGIN:STANDARD DTSTART:20170704T193000 RDATE:20171001T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20180401T020000 RDATE:20181007T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20190407T020000 RDATE:20191006T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20200405T020000 RDATE:20201004T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20210404T020000 RDATE:20211003T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20220403T020000 RDATE:20221002T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20230402T020000 RDATE:20231001T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20240407T020000 RDATE:20241006T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20250406T020000 RDATE:20251005T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20260405T020000 RDATE:20261004T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20270404T020000 RDATE:20271003T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20280402T020000 RDATE:20281001T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:DAYLIGHT DTSTART:20171001T030000 RDATE:20180401T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20181007T030000 RDATE:20190407T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20191006T030000 RDATE:20200405T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20201004T030000 RDATE:20210404T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20211003T030000 RDATE:20220403T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20221002T030000 RDATE:20230402T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20231001T030000 RDATE:20240407T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20241006T030000 RDATE:20250406T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20251005T030000 RDATE:20260405T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20261004T030000 RDATE:20270404T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20271003T030000 RDATE:20280402T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20281001T030000 RDATE:20290401T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:c6a5d5bf0821c493f9f5ac35e7378eca CATEGORIES:Guest Speaker Night CREATED:20180225T161038 SUMMARY:Guest Speaker - Peter Eyland (SASI) DESCRIPTION:How the Universe Exists: From Un-Clear Physics to Nuclear PhysicsPhysics is about how things work. This talk is about particles and what holds them to gether. It will also include how this affects the working of the stars.\nIn 1932 the atom was thought to be simply protons and neutrons in the nucleus , with electrons in energy levels around it. Then chaos descended with mult itudes of particles and the idea of probabilities determining things. Alber t Einstein is quoted as saying “out of clutter find simplicity”, so this is an attempt at that.\nThe elementary particles of matter are now grouped as Hadrons (“bulky things”) and Leptons (“light bits”). The Hadrons are furth er split into Baryons (“heavy weights”) and Mesons (“middle weights”).\n\nH owever, it was found that Hadrons were made from more fundamental particles called Quarks, which have both electric charge and “colour" charge. What b inds the Quarks within a Hadron are some kinds of “glue” particles.\nLeavin g aside gravity, the elementary particles interact with three forces called the Strong Nuclear force, the Weak Nuclear force and the Electromagnetic f orce.\nThe Strong Nuclear force binds nuclei together and the fusion of nuc lei by stars creates heat, light and all the elements that naturally exist. \nBecause of the Weak Nuclear force, if you could collect a bucket of neutr ons, only half of them would be left in ten minutes, because they would dec ay into protons by emitting electrons.\nWhen two protons are together, the Weak Nuclear force can cause one proton to decay into a neutron and the Str ong Force can hold that proton and neutron together. Without that, Hydrogen can’t fuse into Helium and there would be no stars and no planets.\nThe El ectromagnetic force creates electric forces, electric current and magnetism . In particular, it controls the behaviour of plasma (an ionic gas) within magnetic fields, which is central to our understanding of the formation of stars and planets. It can generate visible light as well as other non-visib le radiation. It binds atoms together into molecules and life. It also stop s us from falling through the floor.\n \nPeter Eylandwas an academic in the School of Physics at UNSW for 35 years full time, and spent 10 years as a casual academic after his retirement. He has been active in a number of clu bs and societies as Board member, management committee, etc. His qualificat ions include B.Sc. UNSW (Physics and Maths), M.Physics UNSW, B.D. Hons Lond on, Th.L. Hons Aust Coll Theol, M.A. Macquarie (Ancient History).\n X-ALT-DESC;FMTTYPE=text/html:

How the Universe Exists: From Un-Clear Physics to Nuclear Physics

< p>Physics is about how things work. This talk is about particles and what h olds them together. It will also include how this affects the working of th e stars.

In 1932 the atom was thought to be simply protons and neutro ns in the nucleus, with electrons in energy levels around it. Then chaos de scended with multitudes of particles and the idea of probabilities determin ing things. Albert Einstein is quoted as saying “out of clutter find simplicity”, so this is an attempt at that.

The elementary part icles of matter are now grouped as Hadrons (“bulky things”) and Leptons (“light bits”). The Hadrons are further split into Bar yons (“heavy weights”) and Mesons (“middle weights” ).


However, it was found that Hadrons were made from more funda mental particles called Quarks, which have both electric charge and “ colour" charge. What binds the Quarks within a Hadron are some kinds of &ld quo;glue” particles.

Leaving aside gravity, the elementary part icles interact with three forces called the Strong Nuclear force, the Weak Nuclear force and the Electromagnetic force.

The Strong Nuclear force binds nuclei together and the fusion of nuclei by stars creates heat, ligh t and all the elements that naturally exist.

Because of the Weak Nucl ear force, if you could collect a bucket of neutrons, only half of them wou ld be left in ten minutes, because they would decay into protons by emittin g electrons.
When two protons are together, the Weak Nuclear force can cause one proton to decay into a neutron and the Strong Force can hold tha t proton and neutron together. Without that, Hydrogen can’t fuse into Helium and there would be no stars and no planets.

The Electromagnet ic force creates electric forces, electric current and magnetism. In partic ular, it controls the behaviour of plasma (an ionic gas) within magnetic fi elds, which is central to our understanding of the formation of stars and p lanets. It can generate visible light as well as other non-visible radiatio n. It binds atoms together into molecules and life. It also stops us from f alling through the floor.

 

Peter EylandPeter Eyland

was an academic in the School of Physics at UNSW for 35 years full time, and spent 10 years as a casual academic after his retirement. He has been active in a number of clubs and societies as Board member, management committee, etc. His qualifications in clude B.Sc. UNSW (Physics and Maths), M.Physics UNSW, B.D. Hons London, Th. L. Hons Aust Coll Theol, M.A. Macquarie (Ancient History).

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