The observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. Nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to Pluto, recently demoted from planet to dwarf planet. Questions on knowledge about the material and physical aspects of our world are asked and answered here.
melt calendering
Plexiglas is the trade name of the polymer polymethylmethacrylate.
Objects from PMMA are manufactured by extrusion, injection or
compression. The method of cells casting was abandoned now.
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Static Electricity
Static electricity is usually a 'high voltage' but low power
form of electricity. You can experience it by getting a shock when
touching a door knob (winter time, dry cold air, walking across a
carpet) or seeing socks clinging to other clothes in a dryer. While
static electricity…
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for USA, Canada and countries running a 60 Hz power supply service.If the current draw through the circuit is less than the rated current of the circuit then there is no problem. In this case if it is a 30 Amp dryer fed through a 50 amp outlet on a pigtail that has a 30 Amp plugplugged into a 30 Amp…
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YOU have become a conductor. In simple terms: If you touch an energized circuit wire (hot) with one hand, and something metal (that is grounded) with the other hand....ZZAAP!
Your stove likely isn't grounded properly. The socket for that particular element is probably leaking current to the c…
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The answer given below refers only to USA, Canada and other countries using the same type of 60 Hz, 240 Volts "balanced around ground" system for standard mains power supplies to homes, offices, etc. Basically, it comes down to reducing the amount of lost power due to resistance of the wires in the …
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Terrestrial plants that are able to survive in or very close to sea
or brak water are called Halophytes, this means that they
are able to either process salt water or extract water from salt
water.
Most plants cannot survive on sea/ saline or brak water, as the
process of osmosis that enables wate…
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A black bottom pool will be slightly easier to heat than a white bottom pool, but the difference will be very, very small.Yes, some very small amount of extra energy will be absorbed by the black color and absorbed into the water that would otherwise be reflected by the white color pool, but this sm…
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Absolultely, after an intitial set you want the concrete to dry at 50% humidity and a temp between 50 to 70 degrees if possible. Proper hydration is key too much water bad concrete too little water bad concrete. Or use curring blankets but be careful here. Best results are to wet down the concrete 2…
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Not much choice other than to shut off the water to the entire house at the meter or at a secondary valve that may be installed where the water main enters the house.Yes, that is the only way, other than freezing the pipe using a special tool some plumbers carry, where if no valves are found or if a…
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%REPLIES%
Answer
Because someone has connected the hot water line to the cold service. They are reversed.
Answer
I'm not a plumber, so I don't know if the first answer is correct or not. However, our landlord replaced our shower fixture with one that could be adjusted so that it prevented…
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No it is not bad if you do so because it does not matter since you are majoring in something else. Most colleges only require 2 or 3 science classes to get into the college. Since you are not majoring in science related field, you are fine taking just enough to get in. Another thing that might help …
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Yes, all the factors that are used to determine your credit score are important.When any credit account is delinquent, the amount of the delinquency is not AS significant as the fact that it was not paid as agreed, but it is a factor.
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The dependent variable might be termed the "ordinate".
The dependent variable in an experiment is the data you are
collecting.
When some variable depends on other variables, it is called the
dependent variable. For example, the temperature of something will
depend on how long you heat it, and th…
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Fix Christmas Lights
most off the time it is the fuses. they are in the plug most have 2 slots that slid out where the fuse are located just replace the fuses and that should take care of your problem. however 90% of the time this is not the issue.
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Static electricity can also cause uncomfortable shocks to a person
who becomes "charged up". To experience this shock, drag your feet
across a carpet in socks, then touch your finger to a doorknob.
Static electricity can be responsible for the ignition of flammable
gases, such as the vapors produced…
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Answer
Organisms in streams need oxygen to live when lacking dissolved oxygen it will kill these organisms.
edit: unless the organisms in the stream are photosynthetic, in which case they will increase the oxygen levels. however, by far, most organisms in a stream are not photosynthetic and oxyg…
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That question should probably be phrased differently. Gallons are a measure of volume. So are cubic inches and cubic feet. There are 231 cubic inches in one 1 gallon of fluid, and if that fluid is water, then it weighs 8.32 pounds. There is no such thing as a cubic gallon.Cubic is a term that implie…
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Water Pressure
Here is what Contributors had to report on water pressure sounds:
First, the temperature of the water affects the internal diameter of the faucet and faucet neck where the water is delivered. Hot water coming through the faucet neck will cause inward expansion, parially closing of…
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I don't think stainless steel is a heavy metal.
You kind of answered your own question by referring to both 'heavy
metals' and 'metal.' They are not the same thing. While 'heavy
metals' are metal, not all metals are 'heavy metals.'
'Heavy metals' refer to metallic chemical elements that have
relat…
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Elements and Compounds
The elements are Hydrogen, Oxygen, Sodium, and Chlorine.
The compounds are Water and Sodium Chloride (salt).
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The heart is closest to the brain, so when we walk it takes longer for the blood to get to our legs (that's why we exercise) and when we stand on our head the blood basically gushes to the brain. Your brain is saying "Whoa, what the heck is that!" Actually, it's healthy to stand on your head (in a Y…
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Rainbows
Rainbows have been the subject of songs and poems, stories and mythology, but there is an explanation as to why rainbows appear as they do.
Rainbows are light and you can't touch them. The sun must be shining and must be behind you, and there must be water droplets in the air in front o…
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No we do not need to, we just want to.
Cloning technology holds the key to solving a lot of the world's problems that might not otherwise be fixable. If you want a cure in the near future for lots of diseases like Parkinsons, cancer, etc, then yes we really need to study cloning.
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Sound is a transverse wave made by particles banging into one another. (thus sound cannot travel in a vacuum)In air (a gas), the particles are a long way apart so it takes longer for them to collide with one another to carry the sound.In a solid, say a bar of metal, all the particles are jammed real…
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Easy, it's not...."Test Tube" babies are a product of a process in which an egg and a bunch of sperm are isolated in one tube (dish) and once the egg is fertilized, it's inserted back into the female to grow. This is sometimes done with multiple eggs to increase the chances of one surviving with the…
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First, the term "test tube" is popular, but it is not the terminology used by scientists. They instead use the latin term 'in vitro' (literal definition: in glass; but modern definition more like 'outside the organism'; the opposite is 'in vivo'), In vitro fertilization is simply putting…
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The reason water freezes is that as heat energy leaves the water, the water molecules move more slowly. Ice crystals begin to form a solid lattice with higher cohesion between molecules. If the ice is reheated, it will lose its lattice structure and resume liquid form.
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You get a water purifier or a softener. (A water
softener wont "neutralize detergents from domestic grey water."
Indeed, a softener will do the exact opposite since hard
water neutralizes many types of detergents.)
Depends on what you mean by "neutralize". If you mean make the
detergent no longer f…
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There are several options depending on the desired result.
If one merely wants to remove bubbles, but does not care if one
removes all dissolved gasses causing the bubbles, one can just wait
and bubbles will float to the top and disappear though agitating
the vessel to dislodge them from the sides…
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The length of all of your body hair, including arm hair is controlled by the growing cycle. A hair strands growth cycle consist of: a growing period a resting period falling out and start of new growth period with a new hair strand.The length of the growing period is fixed for each type of hair (lik…
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Although the underlying theory of the atomic bomb workings draws
loosely from Einstein's ideas on mass to energy conversion (the
famous equation E=Mc2), he did not himself invent the atomic bomb
neither did he himself discover fission. Leo Szilard invented the
neutron chain reaction that makes both …
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Answer
phosphorescent is glowing in the dark;reusing old light it has stored, like a glow in the dark keychain
fluorescent is something that glows when energy is applied to it, such as the fluorescent lightbulb
Answer
As the name implies, phosphorescent comes from the element phosphorus. Man…
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Milk weighs more because it is more dense. Answer: Milk is a complex mixture containing sugars, salts, lipids and proteins. As a consequence its mass/volume or density and its specific gravity vary with the type of cow and the specific cow. To minimize variables the milk or water must be at the sa…
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Answer
Validity of anything is determined by the results and consequences of that particular thing to most people. If you have a positive experience with something, then you tend to treat it as valid, and the opposite is true if you have a negative experience.
Astrology, according to those who p…
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Einstein has some credit in the development of the nuclear bomb,
but never thought of it himself... I believe it was Hitler who
first thought of the atomic bomb. The Germans were working on a way
to harness the energy from a split atom. Einstein sent the US
president a letter, telling him of the pow…
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Why There Are Still Apes
Many people believe that man did not evolve from apes at all, we were created by God in His own image. That God gave man a human soul that makes them individual.
The only other option is a theory called evolution, by which over billions of years, the whole earth and ever…
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It would be very easy to get a job but it probably won't be doing anything with chemistry. Most chemistry jobs require at least a masters or doctorate. You might be able to find work as a lab assistant doing menial tasks but without an advanced degree it is next to impossible to find work in the fie…
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The gravity is the same regardless of flooring type. The bouncyness of the floor depends on the floor material and this is what affects how high the ball will bounce. For example, carpet will absorb energy and ball will not bounce as high as on concrete or a sprung wood floor, which do not take a lo…
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Of the three mediums (gas, liquid, and solid) sound waves travel
the slowest through gases, faster through liquids, and fastest
through solids. This is because longitudinal waves require
collisions between particles to transmit energy - in dense
materials, the atoms are closer together, leading to m…
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I suggest reading Richard Rhodes books: The Making of the Atomic Bomb and Dark Sun.Wikipedia also contains good explanations.There are a number of different types that operate by different principles:Fission: splitting large unstable atoms into smaller ones with neutron chain reaction.Gun design, al…
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By mass, they are classified as liquids. However, if one examines the intermolecular attractions in between the molecules, gels will appear solid. Therefore, gels are classified somewhere in between.
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Answer
One reference is to the growth of nanotechnology in southern countries such as India, Brazil, and China (which are moving along quickly) in comparison to countries in Sub-Saharan Africa and the Islamic world.
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Answer
The Scientific Revolution refers to that period in history (basically the 17th century) when men and women began to ascertain truths about life, the world, and the heavens, without resorting to Christian dogma for the answers. The beginning of the scientific revolution may be laid solidly…
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1700-1804 ending with the death of Immanuel Kant
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Ammonium Nitrate and water. Urea + plus a Non-Toxic Cooling Additive and Water providing a safer alternative to the dangerous Ammonium Nitrate *Ammonium Nitrate is highly dangerous and used as an oxidizing agent in explosives.
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A clone is an organism that is genetically identical to the
organism from which it was produced! :)
P.S. - Cloning is like creating twin. The created twin will be far
younger than the organism from which it was produced. Anyway, it
needs surrogate mother womb. In a way cloning is done to 'reverse
t…
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How do you remove a stopper from your bathtub if it's the kind that you turn and it goes up or down?
Turn the stopper until it closes. Then use a pair of pliers and turn the stopper top counter-clockwise. This should unscrew the stopper.
Also if the stopper is up you can use a small Phillips driver to loosen the small set screw underneath.
More Detailed AnswerYou can always try drain …
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The fastest response from the nervous system is from the autonomic system which is involuntary. Heartbeat and reflex movement come from this system which is out of your conscious control. It is centered in the cerebellum and spinal cord. Impulses from your sense organs (a bad smell or a knock to the…
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This is an educated guess only: The most likely time of day for an
avalanche would be in the afternoon and the most likely time of
year would be in the spring. The logic behind this "guess" is that
as the temperature begins to rise (i.e., in the afternoons and in
the spring), the snow begins to melt…
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It all depends on the way in which the iron's 'domains' are aligned. Iron is inherently magnetic as a material, but can become demagnetized as time goes on, due to sudden impact or when affected by another magnetic source. For iron to become magnetized 'domains' need to be in parallel with each othe…
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Combustion is an exothermic reaction, generally categorized by the release of energy through heat or light.A combustion reaction must occur between oxygen and a fuel. The products vary from incomplete to complete combustion. Incomplete combustion occurs under the lack of oxygen, which complete combu…
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Answer
No. According to www.dictionary.com, "Phrenology" is "the study of the shape and protuberances of the skull, based on the now discredited belief that they reveal character and mental capacity". A blow to the head could cause a bump, and a severe blow could cause changes in intelligence and…
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95% Argon 5% CO2 is most commonly used for spray MIG.
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How Science Relate To Basketball January 13,2009 When you bounce the ball you are creating kinetic energy or when you toss the ball you are also transfering kinetic energy from your muscles to the ball. Another thing is gravity. When you miss a shot and it falls from the hoop or backboard down to th…
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Answer
Paracetamol is a pain reliever, somewhat like aspirin.
WIKIPEDIA provides a very specific answer as follows:
Paracetamol (INN) (IPA: /ˌpærəˈsiːtəmɒl, -ˈsɛtə-/) or acetaminophen (USAN), is the active metabolite of phenacetin, a so-called coal tar analgesic. Unlike phenacetin,…
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The following geometers were born in turkey; Thales of Miletus (c.
630-c 550) Anaximander of Miletus (c. 610-c. 547) Anaximenes of
Miletus (fl. c. 546.)
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The units for density are incorrect. If the density of a block of wood is 0.5 g/cm3 then the volume of a 27 g block would be 27/0.5 cm3 = 54 cm3
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As a rough guide engine oil usually weighs about 0.87 kg/litre or about 7.2 pounds per US gallon.
Unfortunately a rough answer is the best that can be done as there are hundreds of different types of engine oil with slightly different densities. To get an exact density we would have to know the det…
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Your question is somewhat difficult to interpret, but presumably you are referring to visible light and the word "clearly" is key. Many media are transparent to the electromagnetic radiation we call light. Light passes through a vacuum freely, without obstruction or change. A wide range of gasse…
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make a square base, and 4 triangles of certain lengths so that all spaces are covered and also make sure that the triangles have the same angles in every corner.
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Mass of an AppleWhat a tricky question! You can easily measure the WEIGHT of an apple... or the downward force the MASS of the apple excerts in it's gravitational field on earth.Weight is a very good approximation of MASS... but to determine EXACT mass is something you'd not be able to do in the "ba…
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To become an Oncologist, or cancer specialist....
To become an Oncologist, or cancer specialist, a medical degree is
the first requirement and usually takes four-six years to earn
(depending on the country). After that, a one (1) year internship
and several years (generally two (2)) of residency in …
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Answer
Coffee makes your teeth yellow. If you try to whiten your teeth and you drink coffee, it can provide whitening as effective as any other stain. The stains on teeth are similar in chemical makeup (from smoke, tobacco, food, enamel mutation, etc.) and thus is not major determining factor. So…
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Answer
Nothing, Gatoraid is simply electilites (salts) that you need to sweat. Soduim and Calcium should have no deleterious effect. As for the coloring, I supose if you drank enough you could turn your teeth what ever color it is.
Answer
Over a period of time the sugar in Gatorade can …
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Darwin's classic theory of evolution assumed that evolution is a slow, contunuous process, by which new species evolve and emerge. This is referred to at times as "organic evolution" and the "synthetic theory of evolution", or just the Darwinian theory of evolution. A newer theory, proposed original…
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Rubber is naturally made from the sap of rubber trees.These grow in
tropical climates such as Malaysia. We can also make synthetic
rubbers, starting with substances from crude oil. Natural rubber
has few uses in its untreated state, being a very soft substance.
Examples include insulation and adhesi…
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BHT
Potasium Sorbate, Sodium Hexametaphosphate, Calcium Disodium EDTA. Take your pick, all are flavor stabalizers and prolongers. Look at any soda can or bagged or canned food. You are likely to find one of those or an abbreviation for one of them.
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A circuit works through a series of components mainly resistors, capacitors, and IC's. There are different types of IC's the main groups are AND, OR, NOR, & NAND. Those are just the basics you first learn about when dealing with electronics. These IC's work from what we call the binary code whi…
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Answer
A substance composed of lipoprotein that is secreted by the alveolar cells of the lung and serves to maintain the stability of pulmonary tissue by reducing the surface tension of fluids that coat the lung.
Answer
In another context, a surfactant is the ingredient in soap or detergent t…
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Paper Plates
Paper plates are made of byproducts of the paper making process. Cellulose, oil, resin and various wood chemicals. The designation paper plates generally refers to all disposable plates. 57% of so called "paper plates" are made of polystyrene, which although not biodegradeable us m…
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yes...fraternal twins (different ova and different sperm). although it is also possible to generate identical twins I suppose (single ovum and single sperm). I have no idea what the statistics on this are however.Although if you're *really* asking "can I *force* a fertilized ovum to split into two a…
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It takes longer because the oxygen needs to travel to the mitochondria.
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Your cold water comes directly from the main line without hitting resistance. Your hot water travels through your water heater which may decrease the pressure. Is this a new problem or has it always been like this? If it is a new problem you may be getting build-up in the lines near the water heater…
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Because they are less dense than the water. We call the amount of mass in a given volume of space the density. For instance, we could measure the mass of some fresh water in a container. We would then divide the mass of the water by the volume of the container to find the density. However, if we fi…
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Answer
The corn that we eat is the seed part of the corn plant. Each little kernel is a fertilized seed, and if left to mature and dry can be planted and will grow a corn plant.
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Answer
The way I understand it, wetlands have a lot of trees. Trees and other plants absorb carbon dioxode (what humans breath out) and emit oxygen (what humans breath). This is why people have fewer allergies and are generally healthier whe they have large leafed house plants in their homes.
Th…
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Do you mean primary qualities? Primary qualities have to do with philosophy. If that's what you meant, ask the question again. It it's not, just delete my answer.
-DJ Craig
As by primary inequalities do u mean mathematical inequalities?.....if so there are inequalities considerinf triangles and ar…
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Greece, Germany, China, India, Russia, Japan, Scandinavia, the British Isles, the Middle East, North America, Central America, South America, etc.In other words, just about everywhere.Conifers are simply cone-bearing trees. They include pines, cedars, junipers (which are excellent for Bonsai), cypre…
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Hard sciences are characterized as relying on experimental, empirical, quantifiable data, relying on the scientific method, and focusing on accuracy and objectivity. Chemistry, physics, and psychology are examples of hard sciences Soft sciences are less quantifiable and considered more subjective.…
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Answer
It's a matter of selective absorption and reflection of the varying wavelengths of light. Our eyes and brain work together to interpret the different wavelengths of light as different colors. White light is composed of all possible wavelengths of visible light, and sunlight is very nearly …
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Answer:
It hasn't been done...yet. But in the sci-fi terms that define what a lightsaber is constructed of, it wouldn't work. But even George Lucas himself admitted that he was simply creating fiction and didn't know anything about how it would work. He just called it a lightsaber because...well.…
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Water is formed when two parts Hydrogen bond with one part Oxygen.
Water is formed and destroyed in many locations including plants
during photosythesis, in stellar supernovae, and through other
chemical and nuclear reactions.
In very basic terms, winds pick up moisture from waterways and
oceans. …
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Gymnosperms (meaning "naked seeds") are seed-bearing plants that don't produce flowers, instead they have male and female reproductive organs mostly in the form of cones. Their microsporophylls release pollen into the air to make available to the ovule, in the megasporophylls causing fertilization. …
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Red Blood Cells (erythrocytes) don't have nuclie when they are mature, the same thing applies to platelets (thrombocytes).
^correct red blood cells are full of hemoglobin wich caries oxygen
First answer is spot-on. Corralaries: 1. You can't clone a human being from a red blood cell. (…
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Answer
Warm water not only helps to kill bacteria that naturally grows on the skin, but it also helps to open the pores getting any kind of face wash deep into your skin.
1. Do not pick, press or rub your pimples. These actions actually increase the sebum production and rupture the membranes bel…
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Extruded aluminum (or aluminum as they say in England) is just aluminum squeezed through an oriface. Just like that play-dough toy where you squeeze out a length through various shaped holes.
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Yes. This is fine because alcohol freezes at - 80�C and boils at +78�C.Rum, sambuca and beer all have water in them. The water can evaporate as well as the alcohol at about 20 Degrees Celsius dependant on environmental factors like draft, bottle cap and temprature to name a few.
Let me gu…
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Answer
A movement of fresh water, usually in a lake, that resembles somewhat, a tidal movement in salt water. This is a rare happening, and does not last long. It is usually associated with strong winds.
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Dominant
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I don't know the principle of operation, but years ago in "Popular Electronics" magazine, there was a construction article for a device that would allow you to hear super-sonic sounds like dog whistles, the sounds that insects make, etc. I think it mixed and shifted frequencies kinda like a super-he…
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Women often introduce drugs via their bloodstream, such as acid, cocaine, heroin,alcohol etc. as the sperm and egg are coming together or as the brain is developing. It is well studied. Birth defects can result and/or learning disbilites. The degree of deformity or retardation is variable.
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You cannot travel at the speed of light. _________________________________
If you were moving at the speed of light and looked behind you a few things could possibly happen. 1st after the flash of light that was traveling with you showing what was behind you all you would see is black, because no…
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8.35 pounds.Because ice is a solid, technically you cannot measure ice using gallon as the units. However, a gallon of water that has turned to ice will have the same weight before and after freezing. This will not be true if the temperature is lowered even further or the ice is under pressure.At 4 …
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You could be asking about the element Mercury or the planet Mercury. The element Mercury is probably most remarkable for being a metal which is liquid at room temperature.However, I think this is about the planet. The planet's famous feature is called the "Caloris Basin".
The first answer as…
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Answer Ok, The sky is only white if there are clouds in it, otherwise it is blue because the atmosphere acts like a big mirror and reflects back the color of the ocean (which covers most the earth).
The Sky is BLUE because light from the sun scatters, and blue scatters the least.
s…
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Removing Ink from Newspaper newspaper can be recycled up to 5 times. When newspaper enters the recycling process at a de-inking mill it is washed in a solution of warm water and chemicals that turns it into a kind of mush. Through a combination of spinning and screening the mush, most ink and other …
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That depends!
It depends on how much ice you have! If you have one kilogram of water, and then freeze it you will have one kilogram of ice.
If you are thinking about density (how much volume one kilogram of ice occupies) then it expands as it freezes. 1 litre/gallon of ice weighs less than an id…
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Answer
This depends on the design of the boat to a certain extent, however typically when a yacht is heeling it would be moving quickly, causing the bow to raise and thus less surface area contacting the water.
The majority of single hull sailing yachts would have less surface area contacting th…
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Answer
Hot water does not freeze faster than cold water. Nor does cold water boil faster than hot water. For water to freeze, you must remove enough heat to bring its temperature down to 0 C. The colder the water is, the less heat you have to remove before it freezes.
Answer
I have no idea …
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