A 6N cube wood block with a side length of 10cm is put into the water tank. When 5cm water is added, it is found that the wood block still sinks to the bottom of the water, and the buoyancy of the wood block is calculated

A 6N cube wood block with a side length of 10cm is put into the water tank. When 5cm water is added, it is found that the wood block still sinks to the bottom of the water, and the buoyancy of the wood block is calculated

In an ideal state, there is no water between the block and the sink, so there is no water pressure, so the buoyancy is 0
According to the gravity of the water, the buoyancy is 5N and the wood block 6N, which is not enough to make it float

A square iron block with a length of 10 cm on one side is placed in the center of the horizontal table. If the surface area of the table is 1 m, the weight of the iron block (the density of the iron) is 1
A 10 cm long cube iron block is placed in the center of the horizontal table, if the surface area of the table is 1 m
(1) weight of iron block (the density of iron is 7.9 × 10-179; kg / m-179;)
(2) the pressure of iron on the table
(3) if the weight of the table is 75n and the contact area between each foot of the table and the ground is 25cm, calculate the pressure of the table on the ground

1. Iron weight M = volume * density = 0.1 ^ 3 * 7.9 * 10 ^ 3 = 7.9kg2, pressure = iron weight / contact area (i.e. iron bottom area) = 7.9 / 0.1 ^ 2 = 790 Pascal 3, table to ground pressure = (table weight + iron weight) / contact area (i.e. total area of four feet) = (75n + 7.9) / 0.25 * 4 = 75n + 7.9 Pascal 3

A uniform cube with a gravity of 200N and a side length of 10cm is placed in the center of the water square table top. If the side length of the table is 50cm, the influence of the cube on the table top is obvious
The pressure is____ If it is pressed against a vertical wall with a horizontal force of 20n, the pressure on the wall is____ If you want the formula, you need the formula

Surface area of cube s = 10cm * 10cm * 0.1M * 0.1M = 0.01M ^ 2
Pressure to table top P = f / S = 200 / 0.01 = 20000pa
The pressure on the wall p '= f' / S = 20 / 0.01 = 2000Pa

A kind of cube cardboard box, the edge length is 10cm. Now there are 10 pieces of 3M2 cardboard. How many cardboard boxes can be made? (excluding the interface)

10 x 10 x 6 = 600 (square centimeter) 3 x 10 = 30 (square meter) = 300000 (square centimeter) / 600 = 500 (piece) answer: you can make 500 such cartons