Buoyancy topics in the second year of junior high school, and buoyancy topics in physics in the seco

Compared with A and C, the buoyancy is the same. Because they are submerged to the same extent, they drain just as much water. According to Archimedes' theorem, buoyancy is equal to the gravitational force of the discharged water. So they have the same buoyancy.

Comparing A and B, there is no way. Because the volume of water discharged by B is large, but the density of alcohol is small, there is no way to compare which of the liquids discharged by A and B has the greater gravitational force. So there is no way to compare A and B.

If A, B and C are completely soaked in water.

The same gravitational force is equal to the volume of the discharged water.

And A and B, because the density of water is greater than that of alcohol, the discharge volume is the same, but the water is heavy, so the buoyancy of A is greater than B.

If they are all floating on the liquid surface, then the buoyancy is equal to the gravitational force of the object, A and B are the same, and C is the heaviest.

ps The buoyancy experienced by the object in the liquid is related to the volume of the liquid discharged, and the buoyancy force is equal to the weight of the liquid discharged.

Yes C Buoyancy is proportional to gravity The greater the gravitational force, the greater the buoyancy Yes C Buoyancy is proportional to gravity The greater the gravitational force, the greater the buoyancy Yes C Buoyancy is proportional to gravity The greater the gravitational force, the greater the buoyancy Yes C Buoyancy is proportional to gravity The greater the gravitational buoyancy, the greater the buoyancy Yes C Buoyancy is proportional to gravity The greater the gravitational buoyancy, the greater the buoyancy Yes C Buoyancy is proportional to gravity The greater the gravitational force, the greater the buoyancy Yes C Buoyancy is proportional to gravity The greater the gravitational force The greater the buoyancy is proportional to gravity The greater the gravitational force, the greater the buoyancy

Yes C buoyancy is directly proportional to gravity The greater the gravitational force, the greater the buoyancy

Float = P water vg = 1000kg m *

2.Because f float = g ball - f, f = 4 5g ball.

So f float = 1 5g ball.

g ball = 5f float = 50n

3.The volume of iron in an iron ball.

V Iron = G Ball P Iron G = 50N (7900kg m * 10N kg) Because V Iron V Ball.

So this iron ball is hollow.

v empty = v ball - v iron =

Yes. For example, if a piece of wood is submerged in a graduated cylinder containing water, and the water surface in the graduated cylinder rises from 40ml to 90ml, how much does the object weigh?

At this moment, only the volume of the wooden block is 90-40=50cm 3, and if the object is not subject to external force at the moment, it is heavy.

If it is acted upon by an external force, the gravitational force is less than.

Hope it helps.

1) Gravity = buoyancy.

P wood * vg = p water * (3 5) vg

P wood = (3 5) p water =

2) P-p*vg=p-liquid*(1-1 3)vg

p liquid = (3 2) p 朩 =

2. 300 = P water * (1-1 4) VG = (3 4) P water * VG buoyancy when fully immersed f = p water * VG = 300 * (4 3) = 400 n buoyancy when immersed in alcohol f1 = P wine * vg = (P wine P water) * P water * vg =