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--- book:appendix:solar-system [2022/10/11 17:28] – [speed constants] jv
+++ book:appendix:solar-system [2022/10/11 22:03] (current) – jv
@@ Line 1: / Line 1: @@
-====== Appendix ======
+====== Appendix 3.  The Solar System  =====
-\begin{align} \label{eq:times}
-\, \text{year} \simeq \pi \times 10^7  \, \text{s}
-\end{align}
-===== A.1  Solar System  =====
 The solar system has $1.0014$ solar masses,
 which amounts to about $2 \times 10^{30}\, \, \text{kg}$.
 The Earth-Sun distance is $1 \, \text{AU} \simeq 500 \, \text{light second} \simeq 1.5 \times 10^{11}\, \, \text{m}$.
@@ Line 43: / Line 35: @@
-==== speed constants ====
+~~DISCUSSION|Typos and suggestions for additional entries~~
-\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}
-\end{align}
-==== masses ====
-\begin{align}
-\text{masses of electron}  && m_e &= 9 \times 10^{-31} \text{kg}  \\
-\text{masses of proton}   && m_p &= 1 \times 10^{-27} \text{kg}  \\
-\text{masses of neutron}  && m_n &= 1,6 \times 10^{-27} \text{kg}  \\
-\text{masses of hydrogen atom} && m_{hydrogen} &= 1,6 \times 10^{-27} \text{kg}  \\ \\
-\text{masses of earth} && m_{earth} &= 6 \times 10^{24} \text{kg} \\
-\text{masses of sun} && m_{sun} &= 2 \times 10^{30} \text{kg} \\
-\end{align}
-==== densities ====
-\begin{align}
-\text{density of water} && \rho_{water} &= 1000 \text{kg/m}^{3}   \\
-\text{density of air} && \rho_{air} &= 1 \: \text{kg/m}^{3}   \\   \\
-\text{density of earth} && \rho_{earth} &= 5,51 \: \text{g/cm}^{3}   \\
-\text{density of moon} && \rho_{moon} &= 3,34 \: \text{g/cm}^{3}   \\
-\text{density of sun} && \rho_{sun} &= 1,41 \: \text{g/cm}^{3}   \\
-\text{density of mars} && \rho_{mars} &= 3,3 \: \text{g/cm}^{3}
-\end{align}
-==== normal constants ====
-\begin{align}
-\text{normal pressure} && p_0 &= 101325 \text{pa} = 1,01325 \text{bar}  \\
-\text{gravitational acceleration} && g &= 9,81 \text{m/s}^2   \\
-\text{gravitational acceleration on the moon} && g_{moon} &= 1,62 \text{m/s}^2  \\
-\text{gravitational constant} && G &= 7 \times 10^{-11} N \times \text{m}^2 / \text{kg}^2
-\end{align}