The direction of the buoyant force on an object placed in the fluid is what?
154782
I'm pretty sure that it is an upward force because the buoyant force would be the force of the liquid, right? The boat(example of an object) would be pushed downward because of gravity, and the water would push back upward. It would be kind of like the ground pushing back upward on your feet.
894576
Diffusion is simply the natural movement of ions and small molecules, usually from one side of a membrane to another, but also throughout a liquid. They always flow from more concentrated to less concentrated. So the concentration gradient between the cell and its environment determines which direction the molecules/ions move.
963983
There are many ways to do this problem.  The best way to probably handle density, and perhaps mass even, is using Archimedes principle of buoyancy.  You can find a detailed discussion on www.wikipedia.com and search for Archimedes or buoyancy.  The main idea is that "the weight of the displaced fluid is directly proportional to the volume of the displaced fluid".  \n\ngood luck!
494151
It's bernoulli's principle. Fluids have a lower pressure when moving than when still. Since the water is moving past the spoons (which act like the wing of a plane) they feel a pull from the pressure drop and come together. Try it with a peice of paper sometime. Roll a piec of paper up so when you place it on a flat surface it looks like a curved bridge. then blow under it and it will collapse instead of blow away. It's pretty neet.
286635
The magnitude of each force depends on a lot of factors. Gravititional force is constant as long as the mass of the object remains the same. Buoyant force depends on the the density of the fluid. If the fluid is plain old air, then the buoyant force is probably very small. But if the object were placed in water, it would have a significantly larger buoyant force. Fluid resistance depends on the surface area of the object, the speed of the object, the shape of the object, the mass of the object, and the density of the fluid. Fluid resistance may be large for a parachute but small for a penny. You could find all of these numbers and compare the forces to see which are larger.
984991
Density = mass / volume\nTo find the volume of an irregular object submerge it in water the amount the water rises is the volume of the object.
70735
The upthrust force equals the weight of the water displaced.\n\nIf d = density of the water,\nV = volume displaced,\ng = acceleration due to gravity,\n\nThe force of upthrust is,\nF = d*V*g
60322
Archimedes principle on bouyancy states that a body submerged in a fluis is subjected by an unbalance force called bouyant force equal to the weight of the displaced fluid. By formula, Fb = Vd\n;Fb = bouyant force\nV = volume of te dispaced fluid\nd = density of the fluid\n\nDimensional Analysis,\nFb must had a unit of force; Kg, N, lb\nV is volume; cu.m, cu.ft\nd is density; kg/cu.m. and so on.\n\nFb(Kg) = V(cu.m.)*d(Kg/cu.m.)\n\nu'll get Kg.
702421
Taking into concept the GRAVITY of the situation and the GRAVITY of the question I would have to say with GRAVITY that the force pulling the water in towards the earth is GRAVITY!
70464
The direction of the draining water is determined by the direction of the new water coming from under the rim of the bowl. The force pushes it into that circle.
823430
the buoyancy of the object and its volume.
308356
Bernoulli's Principle.\n\nThe principle states, more or less, that in fluid (or, in your case, air) flow, an increase in velocity occurs simultaneously with decrease in pressure. More specifically, the sum of all forms of energy in a fluid flowing along an enclosed path is the same at any two points in that path. The *only* cause of the change in fluid velocity is the difference in pressures either side of it. \n\nIn a fluid flow with no viscosity, and therefore one in which a pressure difference is the only accelerating force, it is equivalent to Newton's laws of motion.
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opposite force being applied
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actual motion of heated matter in streams called convection currents.
122240
Buoyancy\nIn physics, buoyancy is an upward force on an object immersed in a fluid (i.e. a liquid or a gas), enabling it to float or at least to appear to become lighter. If the buoyancy exceeds the weight, then the object floats; if the weight exceeds the buoyancy, the object sinks. If the buoyancy equals the weight, the body has neutral buoyancy and may remain at its level. It was the ancient Greek, Archimedes of Syracuse, who first discovered the law of buoyancy, sometimes called Archimedes' principle:\n\nThe buoyant force is equal to the weight of the displaced fluid.\nSuppose a rock's weight is measured at 10 newtons when suspended by a string in a vacuum. Suppose that when the rock is lowered by the string into water, it displaces water whose weight is 3 newtons. The force it then exerts on the string from which it hangs will be 10 newtons minus the 3 newtons of buoyant force: 10 − 3 = 7 newtons.\n\nBuoyancy is the underlying principle of many vehicles such as boats, ships, balloons, and airships.
80144
Center of gravity of the displaced liquid is the center of bouyancy. The (resultant) weight of the vessel acts at the center of gravity(downwards) and the (resultant) bouyant force acts at the center of bouyancy upwards.\n\nIt is better to have the center of gravity lower than the center of boyancy. for stabality. The lower it is the more stable.\n\nThis is because, if the vessel is tilted, the weight and the bouyant force make a couple. This can be against the tilt or with the tilt. If center of bouyancy is lower than center of gravity, it will tilt more. And vice versa.\n\n YOu can find this out by drawing small diagram of the forces.\n\nAlso you can try this. \nTake a pencil. \nhold it vertical but little tilted. \nnow assume, the bottom end is center of bouyancy and top end is center of gravity.\n\nso, push up form the bottom and push down form the top. You will see that the pencil becomes horizontal. i.e you ship sinks.\n\nIf you assume the opposite - take the top to be the center of bouyancy. Pull the top up and the bottom down. The pencil straightens. YOur ship stabalises.
1114940
Pressure can't be associated with a direction coz it is directed in many directions simultaneously. Weight is a vector coz it the gravitational pull that  is always directed towards th centre of earth.