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| Ok so why is it that when I add red paint with yellow paint I get orange paint? Because their was no chemical change that happend I simply mixed them together so how do I get a completly different colour? all the atoms in that material should still be red and yellow | |||
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| The perceived color is the net effect of light reflection to the eye because it cannot detect the tiny molecules of red and yellow. Make tiny squares on a piece of white paper and blacken alternating squares. When you are close to it, you can see the differences. Step back far enough and the page will appear to be solid gray. This is because your eyes can only focus in fine detail up close. As distance increases, you eyes can no longer detect the fine detail and your brain processes the image as best it can. If you could see the individual components of mixed paint, it would be tiny spots of red and yellow. At less than microscopic focus, your brain mixes the colors and perceives orange. |
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| I have a Whirlpool AFB126/H/AL Freezer that keeps defrosting and then freezing intermittently. All the lights are on and the freezer appears to be working but it if you check it every day it will be frozen one day, defrosted the next and then frozen again the day after. Can anyone shed any light on what the problem is? I should add that I am a complete novice when it comes to freezers! |
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| There is a heating element in "frost-free" or "self-defrosting" freezers, usually a glass rod in between the evaporator fins of the freezer compartment. A thermostat turns it on intermittently to eliminate the frost. I would suggest that this heating element of the thermostat controlling it is the culprit. This is not the thermostat you use to adjust the temperature, it is built into the circuitry and you must disassemble the cabinet to locate it. Replacing this thermostat or the heating element are jobs for a skilled repair person unless you are willing risk finding yourself in over your head. Some simple checks before you dive in: Check the door seal for damage. If none is plainly visible, place a strip of paper between the door and the frame, close the door and pull the paper out. If there is some resistance, move it around the perimeter until you find one or more spots with no resistance. The door seal is leaking at those points. The freezer is accumulating excessive frost and the defroster is cycling excessively. It may be possible to reshape the sealing strip by heating it with a hair dryer, but most likely it will need to be replaced. Also check to see if the unit is absolutely level. If not, cabinet warp can cause a bad door seal. I have replaced both the thermostat and heating element, but it is not a job for the faint-of-heart. Replacing the door seal will be a tedious job, but less expensive than a new freezer. Leveling it (with a LEVEL, not your eye!) is easy enough using the adjustable legs. |
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| What weighs 50% more than a gallon of water but when its weight is reduced by 50% weighs less than a gallon of water? | |||
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| What about 1.5 gallons of water? It weighs 50 % more than 1 gallon of water and if you reduce half of 1.5 gallons you get 0.75 gallons, which wheigs less than a galon of water. Other combinations with a liquid/substance with higher density would also work. | |||
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| What is the difference between a V6 engine and a V8 engine, apart from the noise? | |||
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| Engine classification always is according to the cylinder layout. Total numbers of cylinders in any engine are in even number with equal number of engines placed in either side in ‘V’ shape. V6 engines will have three cylinders on either side and V8 engines will have four cylinders on either side. Connecting rods connect to the piston at one end and to a single crankshaft at another. Since these connecting rods thus connected form a ‘V’ shape, therefore we call it ‘V’ configuration or just ‘V’ engine. V-engines have high power applications like racecars or sports car. Two additional cylinders in ‘V8’ engine means greater horsepower and greater torque, provided the cylinder area, the stroke, and number of revolutions are similar. Fuel consumption too is more in V8 in comparison to V6 engine. They are able to develop more power in shorter period. |
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| Lend is to borrow as harmony is to _ _ _ _ _ _d |
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| Lend is to borrow as harmony is to discord. | |||
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| What does the apparent increase in wavelength suggest about the universe? |
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| As the wavelength of a radiation increases its energy decreases. As an example, UV radiation is more energetic and has a lower wavelength than visible radiation (which has higher wavelength and lower energy). As the background radiation of the Universe shows an increase in its wavelength it means is has decreasing energy and hence the Universe is cooling down. Energy = constant/wavelength | |||
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| Does light bounced back from a mirror loose energy? | |||
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| Light reaching an object is always absorbed. In most frequently encountered conditions, some of it will be immediately re-emitted with the same wavelength (reflected), an elastic process with no energy loss. The larger this fraction, the better mirror you have (for a polished surface). Some of the absorbed light is used to change the material (electron excitation, for example) but will eventually be also released but in the form of lower energy radiation, most of it ending up has thermal energy (the material gets hotter). | |||
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| Does light bounced back from a mirror loose energy? | |||
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| Assuming "white light" (full spectrum), some energy will be lost. What kind and how much will depend upon the nature of the mirror. Mirrors tend to be more efficient reflectors than other substances. However, some infrared energy will be absorbed (heat) and other wavelengths may be scattered internally, depending upon the nature of the reflective surface and how the mirror is constructed. The two primary types of mirrors are front-silvered and rear-silvered. A front-silvered mirror has the reflective material is on the outer surface of the mirror. These are extremely delicate, but much better reflectors than rear-silvered mirrors. Most reflective telescopes have front-silvered mirrors to reflect as much available full spectrum light as possible. A rear-silvered mirror has the reflective material on the rear surface, usually glass. These are much less delicate and more suitable for ordinary use. These only need to reflect visible light in detail sufficient to be detectable by the human eye. An example would be your bathroom mirror. Front silvering places the primary reflective surface as the first surface contacted by the light. It reflects the most, but some energy will be lost as heat (absorbed infrared wavelengths) and other wavelengths may be scattered or absorbed. Rear-silvering introduces the properties of the substrate, usually glass. The light must pass through the glass twice. Once upon initial contact and again after reflection off the the silvering on the back of the glass. The properties of the glass will determine how much energy might be absorbed as heat or various wavelengths absorbed or scattered. These are much less efficient, but far more tolerant of physical contact. There is no perfect reflector. Measurable energy will be lost in any event. |
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| Why you believe that the Commedia dell' Arte was so popular for so long? | |||
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| Commedia was always a way of making money. As such, it changed as people's tastes changed. Today, there are still commedia troupes performing something like the original plays, but more importantly commedia's influence is seen in many modern plots and writing techniques. Shakespeare wrote mainly for the ordinary citizen, and he wouldn't have still been played if through the ages his plays hadn't been performed in versions of all sorts, to appeal to the ticket-buying public! |
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| I am relativley new to computers and would like to install a spell checker on my laptop so I can check my spelling while on the internet. How do I go about this? |
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| Google Toolbar has a spell checker and some other useful tools. You can download it here:- http://www.google.com/intl/en_uk/toolbar/ie/index.html |
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| Is it true that chemical reactions are begun by the behavior of electrons? |
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| You could say that. The chemical activity of an element depends on the number of electrons in the outermost orbit of its atom. Tendency is to keep the outermost orbit full. Sodium Na has its 11 electrons in three orbits 2, 8, 1 chlorine Cl has its 17 distributed as 2, 8, 7. These two have great afinity for each other and make pairs or weds by sharing - give and take. Na gives 1 and Cl takes it so they have orbits as Na - 2,8 and Cl - 2, 8, 8. Bothe are satisfied. This is how common salt - NaCl is formed. Losing one electron Na acquires a positive charge while gaining an electron Cl gets a negative charge. these are now ions. Many reactions among molecules are also controlled by electrons as they are mostly ion exchange reactions. |
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