The bottom area of the cylindrical container is 200 cm 2. The container contains 20 cm deep water. After putting the wood block with a density of 0.4 × 103 kg / m3 into the water for rest, the container is filled with water, The pressure on the bottom of the barrel increased by 490 PA Ask: what is the mass and volume of the block
F=PS=490Pa×0.02m2=9.8N
G=F=9.8N
m=G/g=0.98kg
V = m / ρ = 2.45 × 10 negative cubic