Мука 700кг/м^3
Шампунь 1,04 г/см^3
Чай 0,79 г/см^3
Дано:
ρ=19,0 г/м³
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Найдем (по таблице, смотри скрин)
ρ₂₀ = 17,3 г/м³ < 19,0 г/м³ (Роса ВЫПАДЕТ)
<span>Дано:</span>
<span>S1=S/2</span>
<span>V1=1100</span><span>км/ч=305,6м/с</span>
<span>S2=S/2</span>
<span>V2=800</span><span>км/ч=222,22м/с</span>
<span>Vcp-?</span>
<span>Vcp=S/t, S=S/2 +S/2, t=t1+t2, t1=S1/V1=S/2V1, t2=S2/V2=S/2V2</span>
<span>t= S/2V1+ S/2V2=S/2( 1/ V1+1/ V2)=S/2(</span><em><span>V2+V1</span></em><em><span>V1*V2</span></em><span>), t=</span><span> S/2(</span><em><span>222,22+305,6</span></em><em><span>305,6*222,22</span></em><span>)=S/2*0,008</span>
<span>Vcp=</span><em><span>2S</span></em><em><span>S*0,008</span></em><span>=2/0,008=250м/с=900км</span><span>/</span><span>ч</span>
