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% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
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% Document Info
\author{malak\_mohamed}
\pdfinfo{
  /Title (waves-sound-and-light.pdf)
  /Creator (Cheatography)
  /Author (malak\_mohamed)
  /Subject (Waves - sound and light Cheat Sheet)
}

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\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Waves - sound and light Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{malak\_mohamed} via \textcolor{DarkBackground}{\uline{cheatography.com/147241/cs/32038/}}}
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\noindent
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}malak\_mohamed \\
  \uline{cheatography.com/malak-mohamed} \\
  \end{tabulary}
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\columnbreak
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 8th May, 2022.\\
   Page {\thepage} of \pageref{LastPage}.
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  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
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\end{multicols}}




\begin{document}
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% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{4}

\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{SOUND VIBRATIONS AND WAVES}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{3.833cm}}{{\bf{Sound}} is a way of transferring {\bf{energy}}. Sounds are made when things {\bf{vibrate}}.The vibrations are passed on by {\bf{particles}}. Sound therefore need a {\bf{medium}} (substance) to pass on the vibrations ,so it can travel through solids, liquids \& gases but not through empty spaces. The speed of sound is usually faster through materials in which particles are closer together. Closer particles hit each other more easily and so the energy is more likely to be passed from one particle to the next . Sound travels faster in solids than in liquids, and it travels slowest in gases% Row Count 12 (+ 12)
} \tn 
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\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{FREQUENCY AND AMPLITUDE}}  \tn
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\mymulticolumn{1}{x{3.833cm}}{The {\bf{frequency}} of a sound wave is the number of complete waves passing a point each second. The unit of is the {\bf{hertz(Hz)}}. {\bf{Pitch}} is how high or low a sound is. High frequency sounds have a high pitch. The {\bf{amplitude}} of a wave is how far the particles move as the vibration pass. The larger the amplitude, the louder the sound .The loudness of a sound is also described as the {\bf{volume}} or the {\bf{intensity}} of the sound. The loudness of a sound is measured using a {\bf{sound intensity meter}} . The units are {\bf{decibels (dB)}}% Row Count 11 (+ 11)
} \tn 
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\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Sound and Waves}}  \tn
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\mymulticolumn{1}{p{3.833cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/malak-mohamed_1652020373_Sound and light photo 1.png}}} \tn 
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\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{ABSORBING, REFLECTING AND TRANSMITTING}}  \tn
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\mymulticolumn{1}{x{3.833cm}}{Sound waves can be {\bf{Reflected}} by a material. This usually happens if the material is hard. Soft materials {\bf{Absorb}} some of the sound that reaches them, and {\bf{Transmit}} only a little.}  \tn 
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\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{ABSORBING, REFLECTING AND TRANSMITTING (PT.2)}}  \tn
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\mymulticolumn{1}{p{3.833cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/malak-mohamed_1652022996_Sound and light photo 3.png}}} \tn 
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\mymulticolumn{1}{x{3.833cm}}{When a sound wave moves energy from one place to another, we say that the energy has been {\bf{transferred}}. The energy spreads out in all directions unless something stops them. This means that the intensity of a sound gets less as you get further from its source}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{EARS AND HEARING}}  \tn
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\mymulticolumn{1}{x{3.833cm}}{Sound is detected by ears and microphones. In a {\bf{microphone}}, sound waves make a {\bf{diaphragm}} vibrate, and electronics are used to convert the vibrations into changes in an electrical current.}  \tn 
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\mymulticolumn{1}{x{3.833cm}}{The {\bf{ auditory range}} of an animal is the range of frequencies of the sound it can hear. Animals such as bats and dolphins can hear ultrasounds (sounds with frequencies greater than 20 000 Hz). some animals can hear infrasounds (frequencies less than 20 Hz)}  \tn 
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\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{USES OF SOUND}}  \tn
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\mymulticolumn{1}{x{3.833cm}}{Humans and other animals use sound for communication. Some animals {\bf{{[}bats \& dolphins{]}}}, use ultrasound to locate their prey and avoid obstacles. Humans use ultrasound in sonar, to find the depth of the sea or locate fish or submarines. Humans use the energy transferred by ultrasound to clean delicate objects {\bf{{[}Jewllery{]}}} or in physiotherapy {\bf{(to relieve pain or aid healing)}}% Row Count 8 (+ 8)
} \tn 
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\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{COMPARING WAVES}}  \tn
% Row 0
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Transverse wave & Waves on the surface of water. Particles vibrate at right angles to direction wave is travelling \tn 
% Row Count 4 (+ 4)
% Row 1
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\seqsplit{Longitudinal} waves & Sound waves. Particles vibrate in same direction as wave travels \tn 
% Row Count 7 (+ 3)
% Row 2
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All waves & Transfer energy without transferring matter. can be reflected, transmitted and absorbed. can affect other waves by **suprtposition , when their effect can add up or cancel out \tn 
% Row Count 14 (+ 7)
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Transvers waves}}  \tn
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\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
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\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{All Waves}}  \tn
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\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}