diff --git a/_posts/2023-02-12-charging.md b/_posts/2023-02-12-charging.md deleted file mode 100644 index 64c6283..0000000 --- a/_posts/2023-02-12-charging.md +++ /dev/null @@ -1,21 +0,0 @@ ---- -layout: post -mathjax: true -comments: true -title: "Electrostatic Charging by Friction" -tags: physics, electricity, charges, "charging by friction" -date: 2023-02-12 ---- -[# Landsberg - Elementary Textbook of Physics Vol 2 - Mir - 1988](https://archive.org/details/LandsbergElementaryTextbookOnPhysicsVol2Mir1988) - -## Chapter 1 Electric Charges - -### 1.7.1. Why does dry and clear hair “stick” to a plastic comb (combing hair, we sometimes hear a slight crackling, and in a dark room small sparks can be seen between the hair and the comb). - -The dry hair are good electrical insulators. When we use a plastic comb on dry hair, there is electrical charging by friction, with the comb and the hair acquiring opposite charges. Because the hair and the comb have opposite charges, they attract each other, that is they "stick". And while the charges are transferred between the comb and the hair, they lead to sparks and crackling. The sparks and crackling sound is due to very high electric fields, just as in case of a lightning strike. - - - -### 1.7.2. Press a sheet of paper against a warm tiled fire-place and rub the paper with your palms. It sticks to the tiles. When an attempt is made to remove it, a crackling sound is heard, and sparks can be observed between the paper and the fire-place in the dark. Explain the phenomenon. Why is it impossible to perform this experiment with a cold fire place? Recall what has been said in this connection in Sec. 1.2. - -The paper acquires a charge when we rub it with our palms. This charge allows the paper to stick to the tiles. The warm tiled fire-place has hot gas around it which is a good electrical conductor. When we remove it from the fire-place this charge on the paper is neutralised by the hot-air which is a conductor. In a cold fire-place, the air is an insulator hence such effects cannot be observed. diff --git a/tufte.css b/tufte.css index efac9da..b0c3193 100755 --- a/tufte.css +++ b/tufte.css @@ -39,6 +39,31 @@ font-display: swap; } + + + +/* Apply Italic style */ +.italic { + font-style: italic; +} + +/* Apply Bold style */ +.bold { + font-weight: bold; +} + +/* Apply Small-caps style */ +.small-caps { + font-family: 'Latin Modern Sans Caps', sans-serif; + font-variant: small-caps; +} + +/* Apply Latin Modern Sans to
elements with the "latin-modern-sans" class */ +p.latin-modern-sans { + font-family: 'Latin Modern Sans', sans-serif; +} + + /* Tufte CSS styles */ html { font-size: 15px; @@ -49,7 +74,8 @@ body { margin-left: auto; margin-right: auto; padding-left: 12.5%; - font-family: et-book, Palatino, "Palatino Linotype", "Palatino LT STD", "Book Antiqua", Georgia, serif; + font-family: 'Latin Modern Roman', serif; + /* Fallback to a generic serif font if Latin Modern Roman is unavailable */ background-color: #fffff8; color: #111; max-width: 1400px; @@ -113,7 +139,7 @@ p.subtitle { } .numeral { - font-family: et-book-roman-old-style; + font-family: 'Latin Modern Roman', serif; } .danger { @@ -300,7 +326,7 @@ width: 55%; .sidenote-number:after, .sidenote:before { - font-family: et-book-roman-old-style; + font-family: 'Latin Modern Roman', serif; position: relative; vertical-align: baseline; } @@ -332,16 +358,16 @@ table.fullwidth { div.table-wrapper { overflow-x: auto; - font-family: "Trebuchet MS", "Gill Sans", "Gill Sans MT", sans-serif; + font-family: 'Latin Modern Sans', sans-serif; } .sans { - font-family: "Gill Sans", "Gill Sans MT", Calibri, sans-serif; + font-family: 'Latin Modern Sans', sans-serif; letter-spacing: .03em; } code, pre > code { - font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; + font-family: 'Latin Modern Mono', monospace; font-size: 1.0rem; line-height: 1.42; -webkit-text-size-adjust: 100%; /* Prevent adjustments of font size after orientation changes in iOS. 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