Differences

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--- book:appendix:magnitudes [2022/10/11 22:00] – created jv
+++ book:appendix:magnitudes [2022/10/14 06:48] (current) – adam
@@ Line 9: / Line 9: @@
 \end{align}
+==== Surface area ====
+\begin{align}
+\, \text{km}^2 &= 1000000 \, \text{m}^2 &= 1 \times 10^{10} \text{cm}^2 \\
+\, \text{m}^2 &= 10000 \, \text{cm}^2 \\ \\
+\, \text{cm}^2 &= 0,0001 \, \text{m}^2 \\
+\, \text{m}^2 &= 1 \times 10^{-6} \text{km}^2
+\end{align}
@@ Line 14: / Line 21: @@
 \begin{align} \label{eq:times}
-\, \text{year} \simeq \pi \times 10^7  \, \text{s}
+\, \text{year} \simeq \pi \times 10^7  \, \text{s} \\
+\, \text{day} &= 24 \, \text{hour} &= 1440 \, \text{min} &= 86400 \, \text{sec} \\
+\, \text{hour} &= 60 \, \text{min} &= 3600 \, \text{sec}
 \end{align}
 ==== Speed ====
@@ Line 21: / Line 31: @@
 \begin{align}
 \text{speed of light}  && c_L &= 3 \times 10^8 \: \text{m/s}  \\
-\text{speed of sound}  && c_S &= 3  \times 10^2 \: \text{m/s}
+\text{speed of sound}  && c_S &= 3  \times 10^2 \: \text{m/s} \\ \\
+\text{average human speed} && v_{human} &= 7\text{km/h} &= 2 \text{m/s}
 \end{align}
@@ Line 41: / Line 52: @@
 \nonumber \\
 \text{Earth}    && m_\text{earth} &= 6 \times 10^{24} \: \text{kg} \\
-\text{Sun}      && m_\text{sun}   &= 2 \times 10^{30} \: \text{kg}
+\text{Sun}      && m_\text{sun}   &= 2 \times 10^{30} \: \text{kg} \\ \\
+\text{average human weight} && m_{human} &= 80 \text{kg}
 \end{align}
@@ Line 49: / Line 61: @@
 </wrap>
+\begin{align}
+\, \text{t} &= 1000 \,\text{kg} &= 1000000 \, \text{g}  \\
+\, \text{kg} &= 1000 \,\text{g} &= 1000000 \, \text{mg} \\
+\, \text{g} &= 1000 \, \text{mg}
+\end{align}
+==== volume ====
+\begin{align}
+\, \text{m}^3 &= 1000000 \, \text{cm}^3 \\
+\, \text{l} &= 1000 \, \text{cm}^3   \\
+\, \text{ml} &= 1 \, \text{cm}^3
+\end{align}
 ==== Density ====