like what affects diffusion? i know that temperature does but what else?
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diffusion is the movement of molecules from an area of higher concentration to an area of low concentration. diffusion occurs until the molecules reach a certain state called equilibrium.
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Heat is the kinetic energy of molecules; the faster the molecules move, the more heat.\n\nConvection heat transfer is where faster-moving molecules bump into slower-moving ones, transferring their energy so the slower ones speed up and the faster ones slow down, until they reach equilibrium.\n\nRadiation heat transfer is where electromagnetic radiation, such as infrared light or microwaves, excite the molecules in a substance, causing them to speed up and thus heat up.\n\nBecause convection heat transfer only works when molecules make physical contact, convection won't work across a vacuum.  That's how a Thermos works.\n\nRadiation can cross a vacuum, which is how we get heat from the sun.  Hot objects give off infrared radiation, which can be reflected back and contained; that's how aluminum wrap works.
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Heat will make molecules expand.  Expanded molecules will take up more room and will affect the volume.  A hot liquid will take up more volume, especially in small containers, like pipettes.  It will give you a false measurement.\n\nFor accurate results, the glassware is calibrated with liquids at the specified temperatures.
489289
um ahh u meaning diffusion as in seperate.......if so would hurt very bad fattalitys may occur(will)
667546
When the temperature rises, the particles of the mercury in the thermometer gain kinetic energy. This means that they start moving around more vigorously. The particles push away neighbouring particles. This increases the space between the particles and causes an increase in the volume of a mercury. Expansion is said to have occured.
175334
number 4 is partially right. By Gay Lussac's Gas Law, pressure DOES affect temperature directly - more pressure, more temp.
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Ans. C) lead (IV) oxide acts as a catalyst and speeds up the reaction, so that more O2 is evolved per unit time.\n\nAns. D) --by increasing the temperature
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when temperature increases molecules of the reaction bump into each other faster that is why rate of the reaction increases, that is before reaction reaches it's optimum.  when the temperature is higher when the optimum, enzymes become denatured, loose their shape and the rate of the reaction goes down\nhope it helps
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Well, for starters, Temp is important for the catalytic effect, a low temp will slow the reaction, while too high a temp will kill the yeast.  Sugar is the food source for the yeast, so if there is not enough, the yeast wont divide as much.  Water is important of course to provide a comfortable anaerobic environment. Hope that helps you some.
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Diffusion is the normal migration of molecules from an area of higher concentration to an area of lower concentration until and equal concentration is achieved.  Everything in nature does this.\nExample-open a bottle of perfume then pretty soon the person in the next room can smell it and so on.\nOsmosis is diffusion or the movement of water across a semipermeable membrane( a cell membrane that lets some stuff in and keeps others out.).  It can go in or out of the cell based on the concentration.  Water is a common carrier molecule for other substances.\nThus diffusion and osmosis are the same except osmosis must have a membrane crossed.
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Diffusion of gas occurs through the one cell layer thick aveoli in the lungs. The speed of diffusion is dependent on different factors, one being the surface area and second the size of the diffusing particles. In the lungs there is ample surface and Oxygen and Co2 are small particles so the rate of diffusion is great. Hemoglobin has a high affinity for O2 in the lungs and a low affinity for CO2. In the tissues the role reverses and hemoglobin has a low affinity for O2 and a greater affinity for CO2. Now in the tissues since they are small molecules O2 and CO2 readily diffuse across the cell membranes and require no special transport mechanisms. This is simple diffusion where gasses are diffusing down their concentration gradient.
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http://en.wikipedia.org/wiki/Pressure_gradient_force\nhttp://en.wikipedia.org/wiki/Temperature_gradient\nHope this helps, good luck!
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weight (second order effects), roughness, types of materials, speed (second order effects), moisture content (humidity. affects materials such as wood), temperature (ie hot rubber sticks). if the object is moving fast, then aerodynamics can actually effect it by forcing air into the area of contact for example (eg hydroplaning on wet road where water gets between rubber and the road).
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SURFACE AREA INCREASES\n\nIT'S VICE VERSA
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The factors that affect enzyme activity are:pH, temperature, substrate concentration and even enzyme concentration, and inhibitors.\nThere a particular pH at the which the enzyme activity is maximum. This is called the pH optimum of the enzyme.A graph of pH versus enzyme activity shows a bell shape curve.\nThere is a temperature at which the enzyme activity is 100%. If the temperature is increased by 10 degrees Celsius then the enzyme activity becomes doubled. This is called Q10 of the enzyme. Further increase in the temperature lowers enzyme acivity and at higher temperature the activity is lowered further to become nil.\nSubstrate concentration is also important. At lower substrate concentration the enzyme activity is dependent on the substrate but at higher substrate concentration it becomes independent of substrate concentration.\nAt a very low enzyme concentration the enzymes suffer a kind of dilution and become inactivated.\nThere are substances that are called inhibitors.They impede enzyme or block enzyme activity.A competitive inhibitor binds the active site to block enzyme activity. A non-competitive inhibitor binds to enzyme at some other place to cause change in the three-dimensional structure of the enzyme in such a way that the configuration of the active site is changed and in this case the substrate won't fit in nicely to ensure catalysis.
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What type of resistance--thermal, electral, or what?\n\nBoth are generally determined by the bandwidth of free electrons if any are present.  In electrical, it can also deal with impurities in the material.  In thermal, it can have to do with the irregularity of the molecular structure, the density of the solid, and the heat capacity of the molecules.
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The most plausible answer is 3.\n\n- As air expands, it does cool.\n- Cooler air is able to hold less water, so is saturated far quicker.\n- When air is saturated, water droplets will condense out of the air on many available surfaces, including on lenses.