一周街拍盘点 满屏鲜肉大票长腿进入刷屏模式

百度 习近平主席明确指出，“把人民拥护不拥护、赞成不赞成、高兴不高兴、答应不答应作为衡量一切工作得失的根本标准”。

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???? ???, ??????? ????? "?????? ????" ?????????? ??????? ???? ??????, ???? 343 ??? ?????? ?? 1234.8 ??"?, ????????? ?? 20 ????? ?????? ?????? ???. ????? ???, ?????, ?????? ???? ??? ???? ????? ?????? ????? ?????? ???? ????? ?? 4.3 ??????? ???? ?????? – 5309.6 ??"?.

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$c={\sqrt {\frac {C}{\rho }}}$

$C$ ???? ???? ??????? ?? ????? ????? $\rho$ ???? ?? ?????? ?????.

???? ????? ?? ?????? ???? ????? ????? ???? ?:

$c_{\mathrm {ideal} }={\sqrt {\gamma \cdot {p \over \rho }}}={\sqrt {\gamma \cdot R\cdot T \over M}}={\sqrt {\gamma \cdot k\cdot T \over m}}$

????:

• p ??? ????
• $R$ ??? ???? ????? ?????????? ?????? ???? ??????? ?? ??????.
• $k$ ??? ???? ??????.
• $\gamma$ (???????? ??????? ????? ?? $\kappa$) ??? ???? ??? ???? ?????? ???? ???? ???? ?????? ???? ???? (1.402 ??????).
• $T$ ??? ????????? (???????).
• $M$ ???? ???????.
• $m$ ???? ?? ??????? ?????.

????? ??????? ?? ????? ??? ?????? ?? ?????? ????? ??????? ??-????? (?????? ?????? ??????? ????) ???? ?????? ????? ???, ???? ???? ??? ?????? ???? ?????, ???? ?????? ???? ????? ????. ??? 1 ???? ??????? ????, ??? 2 ??? ?? 2 ??????? ???? ??? ????.

?-14 ???????? 2012 ??? ????? ????????? ?? ?????? ???? ?????? ??????. ????????? ??? ?? ??? ??????? ?????? ??????, 373 ??? ?????? ??? 1,342.8 ??"?, ?? 1.24 ???.

??? ?? ???? ?-2014 ?? ??? ??? ?????.^{[???? ????]}

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????? ?????? ?????? ???? ?????? ?? ?? ?????????:

$c_{\mathrm {air} }=(331{.}5+0{.}6\cdot \vartheta )\ \mathrm {m/s}$

???? $\vartheta$ (???) ?????? ?? ????????? ???????, ?-$c$ ????? ?? ?????? ???? ??????. ?????? ??????? ???? ?????? ????? ???? ?????? ??? ????? ????????? ?????? ??? ??? ???, ??? ??? ?? ???? ????? ?????? ??????.

????? ?????? ??????? ???? ????? ???

?????? ?? ?????? ????? ???? ????? ????? ?? "?????? ????" ??? ??: ????? ?? ?????? ???? ????? ????? ????? ??? ?? ??? ???? ??? ?? ???? ???? ????? ??????? ?????? ?????? ?????? ?? ?????? ??? ????? ?? ?? ????. ????, ?????? (?????? ???? ???????? ?? ???) ????? ???? ?? ?????? ?????? ????? ????? ???????, ??? ?????? ??? ????? ??? ??? ????? ??? ????? ??? ?? ???, ???? ????? ?????? ????? ?? ????????, ????? ????? ??? ??? ?????? ??? ???? ???? ??????? ????? ?? ???????? ????????? ?? ???. ????? ???? ??? ????? ?? ????? ????? (?????? ??? ???? ????????? ????? ??? ?????? ??? ?? ????), ???? ????? ?? ?????? ??? ?????? ??? ??? ???? ???? ??????? ?? ??? ?????, ????? ?????? ???? ???? ????? ??? ?? ??????. ????? ????? ?? ?????? ???? ???? ???????? ???? ????? ?????? ?????? ?? ?? ???? ?? ??????? ?????? ?? ???? ???? ??????, ??? ?? ??????? ?????????? ???????.

?? ???, ????? ?? ?? ?????, ??? ?? ????? - ????? ?????? ??? ???? ?????? ??????? ???.

????? ???? ???? ????? ????? ??? ??????? ???? ?????? ?? ???, ??? ???? ????? ????? ????? ?? ???? ????? ???? ?????. ???? ????? ?? ??? ?? ????? ??? ?????? ????? ???? ??????? ?????? ???????? ?????????? ??? ?? ???? - ??? ?? ?? ??? ??????, ?????? ???? ??? ?? ?? ?? ???? ????? ?????. ????? ?? ?? ??????? ??? ???? ?? ?????? ???? ????? ???? ?? ??? ??????, ????? ??????? ??? $\rho$, ?????? ?????? k ?? ?? ??, ????? ???? ??? $P$. ????? ???, ????? ???? ?? ?????? ???????? ?? ????? ????? ?????? ?????? ????? ?? ??? m ????? ???? k, ????? ??? ???? ?????? ?? ???? ???????? ?? ??? ????????? ????????? ???? (????? ???????? ???????????). ?? ????? ????? ?? ?? ???? ??? L, ?? ?????? ?? ??????? ?????? ????? ???? ?????:

$m{\ddot {x_{n}(t)}}=k((x_{n+1}-x_{n}-L)-(x_{n}-x_{n-1}-L))=k((x_{n+1}-x_{n})-(x_{n}-x_{n-1}))$

?????? $(x_{n+1}-x_{n})-(x_{n}-x_{n-1})$ ??? ???? ?????? ??????? ?????? ?? ?????? ??? (?????? ???? ?????? ??????????????): $L^{2}{\frac {\partial ^{2}}{\partial x^{2}}}\psi (x,t)$, ???? $\psi (x,t)$ ??? ????? ????? ??? $x_{n}(t)$ ?- $x_{n}(0)$. ????? ??????? ??????? ??? ????? ??????? ????: ${\frac {\partial ^{2}}{\partial t^{2}}}\psi (x,t)=(k/m)\cdot L^{2}{\frac {\partial ^{2}}{\partial x^{2}}}\psi (x,t)$.

?????? ?? ??? ????? ?????? ?????, ?????? ?????? ??????? ???????? ?? ?????? ?????? ?????? ??????? ?????? ???: $v={\sqrt {\frac {L^{2}\cdot k}{m}}}=L\cdot {\sqrt {\frac {k}{m}}}$.

??? ?????? ?????? ??? ?? ??? ????? ???? ???? ?????? ???? ???, ?? ?????? ?? ???? ???????? ?? ?? ??? ????? ???? ???? ??? ??? S ????? L. ????? ????? ??? ??? ???? ????? ???? ?????? ????????. ???? ??? ?????? ???? ????????? ???????? ????? ??? ?????? ??? ??????? ???? ??? ?????? ????????? ??? ????? ?????, ?? ???? ???? ??? ???? ?????, ??? ?????? ????? ???????. ??????? ?????? ?? ???? ????? ?????? ??????? ??? $PV^{\gamma }=const$, ??, ????? ???????????: ${\frac {dP}{P}}=-\gamma {\frac {dV}{V}}$ ??? ?????: ${\frac {dP}{dV}}=-\gamma {\frac {P}{V}}=-\gamma {\frac {P}{LS}}$. ???? ??? ???? ???????? k ?-${\frac {dP}{dV}}$ ??? ??? ????? k ????? $k={\frac {dP}{dV}}\cdot S^{2}$ ??? ??? ???? ??? $m=\rho \cdot LS$. ?????? ??????? ??????? ???? ???:

$c_{s}={\sqrt {\frac {L^{2}\cdot k}{m}}}={\sqrt {\frac {L^{2}\cdot \gamma {\frac {P}{LS}}\cdot S^{2}}{\rho \cdot LS}}}={\sqrt {\frac {\gamma P}{\rho }}}$.

????: ????? ?????? ?????? ?????? ???????? ?? ?????? ?????? ??????? ????? ?? ??????? ?????? ???? ?????? ?????? ???? ?????? ?????????????? ????? ?????? ?? ???? ????? ??? ?????? ????? (??? ???? ????) ?????? L ??? ??? ????, ??? ?????? ?? ?? ???? ??? ????? ??????? ??? ????? ?? ??????? ??????. ??????? ???? ????, ??? ????? ????? ?????? ?? ??????? ?? ???? ?? ????? ?? ???? ???? ?? ????? ??? ??????? ?????? ?????? ????? ???????, ?? ?? ??? ??? ????? ?? ???????. ????? ????? ??? ??? ????? ?? ???????.

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??????? ???? ??? ?????? ???????: ??? P ???? S. ??? P ?? ????? ??? ???? ???? S ?? ??? ???? ??????? ??? ?-P ($c_{P}$) ????? ???? ??????? ??? ?-S ($c_{S}$). ?? ?????? ??? ???? ????? ???? ???? ???:

$c_{P}={\sqrt {\frac {K+{\frac {4}{3}}G}{\rho }}}={\sqrt {\frac {E(1-\nu )}{(1+\nu )(1-2\nu )\rho }}},$

$c_{S}={\sqrt {\frac {G}{\rho }}}={\sqrt {\frac {E}{2(1+\nu )\rho }}},$

???? K ??? ????? ????, G ??? ????? ??????, E ??? ????? ????????, $\nu$ ??? ???? ?????? ?-$\rho$ ??? ?????? ?????. ???? ???????? ?? ????? ????? ????? ???? ??? ???????? ?????.

???? ????? ?? ?????? ???? ??????? ????? ???? ?????? ?????? ??????? ????? ????????? ???? ????? ????. ??????? ?? ??? ???? ????? ??????? ???? ??? ????????: ??????-??????? ???????? ????? ????? ?????????.

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????? ?????? ??? ??????? ??????? ??????? ?? ?????????? ????, ?-1687, ????? ???? ?????? ???? ?????? ??? ?-979 ??? ?????? (298 ?/?). ??? ???? ??? ??-15%. ???? ??? ????? ?????? ?????? (??? ????? ????? ??) ?? ???????? ????? ????????? ??? ??? (??????? ????????, ????? ??? ??? ???????? ?????? ??? ????? ???????, ?? ????? ????????). ????? ?? ????? ????? ???? ?? ??? ????-????? ????.

????? ???? ?-17 ???? ???? ???????? ????? ?? ?????? ???? ??????, ???? ?????????? ?? ??? ???? ?-1630 (1,380 ??? ??????? ??????), ???? ????? ?-1635 (1,473 ??? ??????? ??????) ?????? ???? (1,125 ??? ?????? ??????). ???? 1709 ???? ????? ??????? ???? (????? ????? ???????? ????????), ??? ????? ???? ?? ?????? ????, ?-1,072 ??? ??????? ?????? (?? ???? ???????? ????? 325 ?"?. ?? ???? ???? ??"??? ??????????" ?????? ??????? ???? ????, ?-304.8 ?"?, ?? ????? ?? ?????? ???? ?-20 °C ?-1,055 ??? ?????? ??????).

???? ????? ??????? ?????? ?? ?????? ??? ????? ????????? ??? ????? ????? ?? ???? ??? ????? ?????, ????? ??? ??? ?? ???? ?? ???? ?? ????? ????? ??????? ?? ??? ?????. ????? ?????? ?? ????? ????? ?????? ???? ???????, ???? ?????? ????' ???????. ????? ???? ?? ??? ?????, ??? ????? ??????? ????? ???.

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