At the end of every workday, a mechanic hoses down the floor of the garage.A mixture of water,oil,and gasoline runs down the drain. If it sits overnight, the mixture will separate into layers. Descride the order of layers. Explain this order using the concepts of buoyancy and density.
218187
Good question, oil and gasoline will both be floating above the water, but which one is going to be floating on top the other is a hard one, i'm still searching....\n\n\nI can't find nothing on oil and gasoline, my guess would be that gasoline will float on top of everything.\n\nSo, water then oil then gasoline. It might depend on type of oil too. The best way to find out is to get a clear jar, get some oil and gasoline, see which one floats!\n\nAnd here's some concepts of buoyancy nad density, also gravity...\n\nAny object placed in water has to contend with two forces, gravity and buoyancy. Gravity is the natural pull of an object toward the center of the earth. Gravity tends to pull a boat down into the water. So what keeps it from sinking? Buoyancy acts as an opposite force to gravity and pushes the object up. Archimedes' Principle says that an object immersed in water is buoyed up by a force equal to the density of the water it displaces. The buoyancy of an object is dependent on its density and the density of the material surrounding it. Density is the relationship between mass and volume.
502912
The easiest way to understand osmosis is to think about a bottle of strong perfume.  When you take the lid off the molecules spread out filling the room slowly with smell.  Molecules move from an area of high concentration to an area of low concentration.  (that is your answer, I believe)  Another way to understand it is to drop food coloring into a large bowl of water.  It will slowly spread throughout the bowl.
559262
blueb_24' s answer to the first part of you question is great. \n\nMechanical mixtures are very simple mixtures that can be separated mechanically (soap is definitely not one). Some mechanical mixtures found in everyday life: \n- M&M's (various colours)\n- Mixed vegies\n- Bag of marbles\n- Box of bolts and nuts\n\nSolutions are more complex and can only be seperated by means of their physical properties, such as boiling point. Some everyday solutions include:\n- Coffee\n- Detergent\n- Salt water\n- Vinager\n\n4.a  Solid solutions: \n- Sand - suspension mixture of solid particles\n- Muddy water - solid particles suspended in water\n- Smoke - solid mixed in gas\n\nb) a liquid solution that does not contain water:\n- Motor oil - a mixture of heavy hydrocarbons\n- Vegetable oil - mixture of plant oils\n\nc) a solution of gases\n- Air - air is a mixture of many gases\n- LP gas (liquid petroleum gas)- mixture containing mainly propane or butane (depending on application)
637819
You must already understand the displacement description so here's an attempt to physically understand the process.\n\nGravity pulls everything with mass  towards the center of the Earth.  This includes water and even air.  This is what creates air pressure and water pressure within a column of the fluid.  The force towards the center of the Earth is called the Weight.  Weight is simply the mass of an object multiplied by the acceleration of gravity (32.2 feet per second).\n\nMolecules in fluids can move around very easily.  They are constantly being pulled downward by gravity.  Generally, they are blocked by other fluid molecules already below them but they pile up and apply a pressure to the poor suckers below them.  The molecules at the bottom of the stack are under tremendous pressure in very deep portions of the ocean because they have to support the weight of the molecules above them.  (This also creates a sea level air pressure of 14.7 pounds per square inch)\n\nShips weigh less than the water they displace.  Gravity is pulling that ship down, trying to get it to the center of the Earth.  Once the weight of the water equals the weight of the ship, the water pushes back with enough force to keep it afloat.  Water molecules can flow easily.  When they begin to weigh more than the effective weight of the ship, they will flow beneath it and push the ship upward.
220791
Could you try the old idea of different types of liquid in a clear glass/plastic tube. Each has a different density, so the heaviest goes to the bottom, the lightest to the top? Cant remember the exact liquids to use, but something dense like oil, then baby oil, water, etc.....the tube can be shaken, but the liquids will always seperate out in layers......
498748
I always liked the Die Hard movies.\n\n1.  Fill the 3 gallon jug\n2.  dump the 3 gallons into the 5 gallon jug.\n3.  Fill the 3 gallon jug again.\n4.  Use the 3 gallon jug to finish filling the 5 gallon jug.  That leaves one gallon in the three gallon jug.\n5.  empty out the 5 gallon jug.\n6.  dump the one gallon of water that was left in the 3 gallon jug into the 5 gallon jug.\n7.  Fill the 3 gallon jug again.\n8.  Dump the three gallons into the 5 gallon just to make 4 gallons total.
460234
1) The gravitational potential energy of water at the top of a waterfall is first converted to kinetic energy (falling) and then converted to both acoustic (sound) and thermal (temperature) energy when it hits the pool of water at the bottom. The temperature of the water in the pool will be slightly higher than the temperature of the water at the top of the waterfall.\n\n2) The thing to remember for this problem is that the energy in a system before some action = the energy in that system after some action:\n\nP0 + K0 + Th0 = P1 + K1 + Th1\nWhere P is gravitational potential energy (mgh), K is kinetic energy (0.5mv^2), and Th is thermal energy (leftover).\n\n22*9.81*4.5 + 0 + 0 = 0 + 0.5*22*2.5^2 + Th1\nSolve for Th1:\nTh1 = 22*9.81*4.5 - 0.5*22*2.5^2 =  902.44 Joules of thermal energy were generated due to friction.\n\n3) Split this problem into two cases, the first 10m and the second 10m. Find the velocity of the crate after the first 10m:\na = F/m = 200/70 = 2.86 m/s^2\nv = sqrt(2*a*d) = sqrt(2*2.86*10) = 7.56 m/s\n\nFor the second 10m, the force of friction on the crate is:\nFf = 0.3*70*9.81 = 206 N\n\nThe net force on the crate is 6N in the direction opposite of movement. The acceleration for the second 10m is:\na = F/m = 6/70 = 0.086 m/s^2\nvf = sqrt(vi^2 + 2*a*d) = sqrt(7.56^2 + 2*-0.086*10) = 7.45 m/s\n\n5) Since watts (W) are measured in J/s and joules (J) are measured in N*m, a watt is the same as N*m/s. Convert lb to N and ft to m to go from horsepower to watts:\n\n550 ft*lb/s * 0.3048 m/ft * 4.45 N/lb = 746 N*m/x = 746 W\n\nPS - You have in your problem description that horsepower is equal to 764 W but that should be 746 W.\n\nI hope this helps!
563817
The oil is usually within a layer of porous material. Imagine a bucket full of marbles and water. You can get the water out of the bucket without disturbing the marbles much at all.
11503
test the reactions of different substances in water. like um put in sugar and salt and then say it dissolved. And put in oil and say it freakin stayed seperate or whatever it does
23957
Your answer is correct, and may be fine for your professor, but for readers who are not already familiar with the problem, both the question and the solution are confusingly worded.  I suggest that in the future, you copy the original question here exactly.\n\n\nI would precede your solution with the following:\n\n\nYou can find the floor in a maximum of 14 attempts.\n\nDrop a bulb from the floors in this order:\n14, 27, 39, 50, 60, 69, 77, 84, 90, 95, 99, 100\n\nIf the bulb breaks, stop and test starting from just above the last floor that it didn't break on, and go up one floor at a time.  If the bulb breaks on the first attempt, resume the test from the first floor.\n\nExamples:\n14 (breaks), 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13\n\n14, 27, 39 (breaks), 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38\n\n14, 27, 39, 50, 60, 69, 77, 84, 90, 95, 99 (breaks), 96, 97, 98\n\n14, 27, 39, 50, 60, 69, 77, 84, 90, 95, 99, 100 (breaks)
244438
well the oil is under pressure, so when we drill all we are doing is releasing the pressure. Then when the pressure is gone there is still some oil left. sometimes to get out the oil we have to pump water down to force the oil up.\nSo it is not like you are left with any empty space if that is what you are thinking.\n\nthere are no consequences that I am aware of.
383967
Q1 some mixture of a difficult-to-separate solid (eg. small bits of sand)  from a liquid
356752
&#92;\n..&#92;\n..-----&#92;\n........&#92;\n.........&#92;\n(ignore the periods)\nx axis: time\nY axis: temperature\nThe step is there because the nature of cooling objects. As the naphthalene is cooled, its temp first decreases normally. However, when it begins to solidify, the heat being removed is used up as naphthalene molecules are subjected to intermolecular forces and begin to become a solid. Therefore, the horzontal part is where the substance becomes a solid. Finally, when the naphthalene is fully a solid, the temperature decreases again. An easy way to picture this concept is with boiling water. As some water molecules change to the gaseous state, the temperature of the water does not rise above its boiling point. This is equivilent to the horzontal part of the naphthalene cooling curve. As the substance changes states, energy is being generated/used up, and the temperature does not change for a time. When the conversiion is fully made, the temperature continus on its original course.
521496
Pore some vegetable oil into a glass of water.  Shake it up then let it sit for a minute.  The oil will separate out of the water and you will see two layers.  The oil is a lipid because it isn't polar and can't dissolve in the water.
4191
Liquid motion lamps (which most people know as "lava lamps") have been around for decades. The theory behind a liquid motion lamp goes something like this:\n\nIn the lamp you have two liquids which are:\n\n    * Very close in density\n    * Insoluble in one another \n\nOil and water are insoluble in one another (that's where the expression "oil and water don't mix" comes from), but oil and water have very different densities (a volume of water weighs a lot more than the same volume of oil). They won't work, so you search to find two liquids that are very close in density and are insoluble. This site can help you in that search.\n\nNow you apply heat to the bottom of the mixture. In a liquid motion lamp, the heat usually comes from a light bulb. The heavier liquid absorbs the heat, and as it heats up, it expands. As it expands it becomes less dense. Because the liquids have very similar densities, the formerly heavier liquid is suddenly lighter than the other liquid, so it rises. As it rises, it cools, making it denser and therefore heavier, so it sinks.\n\nThis all happens in slow motion because heat absorption and dissipation are fairly slow processes, and the density changes we are discussing here are very slight.\n\nHow stuff works has a far longer explanation, see link.
257827
I believe that at equilbrium, you would have a gradient of concentration throughout the liquid from top to bottom.  At the top, you would have primarily A and B reacting.  At the bottom, you would have primariliy AB dissassociating.  In between, you would have various degrees of A, B and AB as A and B rise up from below and AB falls from above.  The magnitude of the gradient would depend on the reaction rate.
222522
I'd say physics rather than chemistry.  When you squeeze a bottle full of water containing a gas-filled "diver", the water is not compressed.  Only the gas in the diver compresses causing the diver to displace less water.  The cartesian diver is carefully made to be just barely buoyant, so when compressed its reduced displacement causes it to sink.