There is a brick with a density of 2.5 × 103 kg / m3 and a pressure of 2.45 × 105 Pascal. If the brick is stacked neatly on the horizontal ground which can withstand 2 × 106 Pascal, the brick can be stacked at most______ It's five meters high

There is a brick with a density of 2.5 × 103 kg / m3 and a pressure of 2.45 × 105 Pascal. If the brick is stacked neatly on the horizontal ground which can withstand 2 × 106 Pascal, the brick can be stacked at most______ It's five meters high

∵ brick wall on horizontal ground, brick and brick wall are square, ∵ f = g = mg = ρ VG = ρ SHG, ∵ P = ρ GH, ∵ P ≤ 2.45 × 105Pa, ∵ h ≤ 2.45 × 105Pa, 2.5 × 103kg / m3 × 9.8n/kg = 10m

Build a vertical wall with bricks. If the pressure of the wall on the ground is 8.82 * 10 ^ 4 PA, calculate the height of the wall. (brick density = 1.8 * 10 ^ 3 kg / m2)

P = 8.82 * 10 ^ 4 PA = 8.82 * 10 ^ 4 N / m2 = 8.82 * 10 ^ 3 kg / m2
Brick density γ = 1.8 * 10 ^ 3kg / m3
Brick wall height h = P / γ = 8.82 * 10 ^ 3 / 1.8 * 10 ^ 3 = 4.9M

A cylindrical container with a bottom area of 100 square centimeter is filled with 20 centimeter deep water. Now put a wood block with a mass of 120 g and a density of 0.6 * 10 * 10 kg / square meter into the water. If the water does not overflow out of the cup, calculate (1) the volume of the wood block immersed in the water after it is still; (2) if the whole wood block is pressed into the water (no overflow), then the pressure of the water on the bottom of the container

(1) (2) the volume of wood block is 120 / 0.6 = 200 cubic centimeter, the wood block is just pressed into the water, and the water surface rises 200 / 100 = 2 cm; the total water depth is 22 cm, and the bottom pressure is 22 g / square centimeter