Question

Giúp mình bài 2

Answer 1

Câu 5:

a. \(\left\{{}\begin{matrix}p_C=dh_C=10000\cdot1,5=15000\left(Pa\right)\\p_D=dh_D=10000\cdot\left(1,5-0,3\right)=12000\left(Pa\right)\end{matrix}\right.\)

b. \(250g=0,25kg\)

\(p=\dfrac{F}{S}\Rightarrow S=\dfrac{F}{p}=\dfrac{0,25\cdot10}{700}\approx3,6\cdot10^{-3}m^2\approx35,7cm^2\)