1 ответ:
Читайте также
Дано:
m=2т=2000кг
Р=10МПА=10000000Па
Найти: S?
Решение:
<span>P=F/S
</span><span>F=m*g
</span>P=m*g/S
<span>S=m*g/P
S=(2000*9,8)/10000000=0,00196м</span>²=196*
м²<span>
Ответ: </span><span>196*м²</span>
m=2т=2000кг
Р=10МПА=10000000Па
Найти: S?
Решение:
<span>P=F/S
</span><span>F=m*g
</span>P=m*g/S
<span>S=m*g/P
S=(2000*9,8)/10000000=0,00196м</span>²=196*
Ответ: </span><span>196*
Уравнение Эйнштейна
![\displaystyle h\nu= A + mv^2/2\\\\ \nu = \frac{A+mv^2/2}{h} = \frac{[A/e]+[mv^2/(2e)]}{h/e} =\\\\ = \frac{4.54+0.5\cdot(4\cdot10^{12})\cdot4/7\cdot10^{-11}}{4.1\cdot10^{-15}}\approx 3.9\cdot10^{15}\text{ Hz}](https://tex.z-dn.net/?f=%5Cdisplaystyle%0Ah%5Cnu%3D+A+%2B+mv%5E2%2F2%5C%5C%5C%5C%0A%5Cnu+%3D+%5Cfrac%7BA%2Bmv%5E2%2F2%7D%7Bh%7D+%3D+%5Cfrac%7B%5BA%2Fe%5D%2B%5Bmv%5E2%2F%282e%29%5D%7D%7Bh%2Fe%7D+%3D%5C%5C%5C%5C%0A%3D+%5Cfrac%7B4.54%2B0.5%5Ccdot%284%5Ccdot10%5E%7B12%7D%29%5Ccdot4%2F7%5Ccdot10%5E%7B-11%7D%7D%7B4.1%5Ccdot10%5E%7B-15%7D%7D%5Capprox+3.9%5Ccdot10%5E%7B15%7D%5Ctext%7B+Hz%7D)