Notes in Physics with Astrophysics Year 3

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Status	Last Update	Fields
Published	02/05/2024	Define Intensive state variables
Published	02/05/2024	Define Extensive state variables
Published	02/05/2024	If two systems are put in thermal contact, generally changes will occur to the {{c2::temperatures}} of both of them. The two systems will tend towards…
Published	02/05/2024	If two systems are separately in {{c1::thermal equilibrium}} with a {{c2::third system}}, then they must also be in {{c1::thermal equilibrium}} with e…
Published	02/05/2024	The Equation for Linear expansion is:\[\Delta L = {{c1::\alpha}} {{c2::L_0}} {{c3::\Delta T}}\]with \[\alpha = \frac{1}{L} \frac{dL}{dT}\]
Published	02/05/2024	The Equation for the Expansion of Volume:\[\Delta V = {{c1::\beta}} {{c2::V_0}} {{c3::\Delta T}}\]
Published	02/05/2024	The First Law of Thermodynamics is:\[{{c1::dU}} = {{c2::\delta Q}} + {{c3::\delta W}}\]
Published	02/05/2024	First Law: \[dU = \delta Q + \delta W\]\(dU\) is an {{c1::exact::exact/inexact?}} differential
Published	02/05/2024	First Law: \[dU = \delta Q + \delta W\]\(\delta Q\) is an {{c1::inexact::exact/inexact?}} differential
Published	02/05/2024	First Law: \[dU = \delta Q + \delta W\]\(\delta W\) is an {{c1::inexact::exact/inexact?}} differential
Published	02/05/2024	In thermal equilibrium, the bulk physical properties are {{c1::uniform}} and {{c2::invariant}}
Published	02/05/2024	What is the ideal gas law?
Published	02/05/2024	simply define quantisation
Published	02/05/2024	{{c1::image-occlusion:rect:left=.3686:top=.0156:width=.1676:height=.2185}}{{c2::image-occlusion:rect:left=.0129:top=.3977:width=.1157:height=.2039}}{{…
Published	02/05/2024	{{c1::image-occlusion:rect:left=.3819:top=.0229:width=.1413:height=.2035:oi=1}}{{c2::image-occlusion:rect:left=.8829:top=.4267:width=.1144:height=.209…
Published	02/05/2024	The Clausius inequality:\[{{c1::\oint}} \frac{{{c2::\delta Q}}}{{{c3::T_0}}}\leq {{c4::0}}\]
Published	02/05/2024	The {{c1::clausius inequality}} holds when a {{c2::thermodynamic system}} (e.g. heat engine or heat pump) is {{c3::exchanging heat}} with externa…
Published	03/20/2024	What is an LTI system?
Published	03/20/2024	If a sine wave is applied to the {{c1::input}} of an LTI system, the {{c2::output}} from the system oscillates as the same {{c3::frequency}}, though i…
Published	03/20/2024	The transfer function (sort of) provides a {{c1::magnitude}} and a {{c1::phase}} at every {{c2::frequency}}; every input {{c2::frequency}} has a {{c3:…
Published	03/20/2024	The conventional Transfer function form is:\[{{c1::G(j\omega)}}=\frac{{{c2::Y(j\omega)}}}{{{c3::U(j\omega)}}}\]where \(j\) is \(\sqrt{-…
Published	03/20/2024	Kirchhoff's first law:\[{{c1::i_1+i_2+i_3}}=0\]
Published	03/20/2024	Kirchhoffs second law:\[{{c1::v_1+v_2+v_3}} = 0\]Note: around a {{c2::closed loop}}
Published	03/20/2024	Ohms law:\[{{c1::v}}={{c2::i}}{{c3::R}}\]
Published	03/20/2024	When two {{c1::impedences}} are connected, through which a single {{c2::current}} flows, we can use the fact that {{c2::current}} is 'conserved' …
Published	03/20/2024	{{c1::Paramagnets}} are magnetised {{c2::parallel}} to the {{c3::applied}} {{c4::B}} field.
Published	03/20/2024	{{c1::Diamagnets}} are magnetised {{c2::anti-parallel}} to the {{c3::applied}} {{c4::B}} field
Published	03/20/2024	{{c1::Ferromagnets}} retain their magnetisation, which is determined by the {{c2::magnetic history}} of the object
Status	Last Update	Fields