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Science

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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.

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To understand the potential of "biomass" as a fuel supply, it is necessary to understand the term in the first place. Biomass refers to material of recent biological origin from which energy or energy-rich compounds can be derived. Biomass has been used for all of human history as a fuel source. I…
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Can hot water freeze faster than cold water? It depends. Hot water can in fact freeze faster than cold water for a wide range of experimental conditions. This phenomenon is extremely counter- intuitive, and surprising even to most scientists, but it is in fact real. It has been seen and studied in n…
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A pound of air is NOT a measure of pressure. A unit of pressure would be a weight ( a force really) for instance pound by a surface (square inch for instance).Pound is a unit of weight only. At sea level on earth barometric pressure, 1 cubic metre weighs 1.2kg (or 2.64 pound). Which means 1 pound of…
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Answer The density of dry air at standard sea level pressure is 1.204 kg/m3 at 20° Celsius. The temperature is important. The density of moist air will vary but is obviously slightly greater than the above number. Actually, the above comment about moist air seems obvious but is wrong, so plea…
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Answer http://journeytoforever.org/biofuel_library.html Journey to Forever Online Biofuels Library Answer http://journeytoforever.org/biofuel_library/ethanol_manual/manual_ToC.html The Manual for the Home and Farm Production of Alcohol Fuel Answer Energy Crop Fuel Analysis Summary: Th…
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The dropping of the atomic bombs, nicknamed "Little Boy" and "Fat Man," on August 6th and 9th, 1945, on the cities of Hiroshima and Nagasaki respectively, brought about the immediate and unconditional surrender of Japan. Estimates of allied lives that would have been lost in the otherwise inevitable…
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They improved them a lot! If your question would be more specific, it would be easier to answer. The tennis balls used to be wads of hair or wool wrapped in stuff, but now they are more rubbery for bounce. I don't know exactly how.
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I'm not really sure but I think you need alot of maths & sciences.Try to take the highest mathematic course you possibly can. Science courses such as biology, chemistry, physics, anatomy & physiology are also great benefits to medicine.It depends on the specialization of the one becoming a d…
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The chemical energy in the fuel is a function of the mass of the fuel. Since a gallon of fuel expands or contracts with temperature, a gallon of cold fuel contains more energy than a gallon of warm fuel. The temperature gets colder the higher you go (up to the tropopause, that is) and consequently, …
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Answer The nucleus of an atom contains protons and neutrons. Hydrogen-1 is the lone exception. It has a single proton in its nucleus. Protons and neutrons, when they make up an atomic nucleus, are called nucleons. Links can be found below for more information.
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The simplest answer is that the electric utility uses a transformer across 2 of the 3 hot leads to develop a single hot lead with an earth reference. What follows below is frequently edited by both amateurs and professionals, with mixed results. Wikipedia is a better source of more detailed informat…
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It better to ask "what is the mass of planet earth?" Approx. 6,000,000,000,000,000,000,000,000. The measurement of the planet's weight is derived from gravitational attraction that the Earth has for objects near it. Any two masses have a gravitational attraction for one another. The attraction howev…
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yellow flames are created when the fuel turns into vapour and burns . if the fuel is a clean fuel then if we heat it it produces only heat not a light producing flame(blue flame).If the fuel burns with a yellow flame it means it is not burnt completely and releases unburnt carbon (clean fuel produce…
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Answer AIR!!! well , you see, air is there, but is actually carbon dioxide and oxygen. We breath in oxygen and produce carbon doixide. There are also other substances in the air, such as car exhausts (also carbon dioxide, amongst others, like nitrous oxide, carbon monoxide et al) and others from …
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Answer Without the environment you wouldn't be able to live. The enironment is an extremely important part of our lives and nowadays people aren't respecting it.
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Cantilever Beams If you know the natural frequency and the mass of the load and beam... k=Wn^2*m (where k=stiffness, Wn=natural frequency, m=total mass) If the beam's mass is not negligable then the total mass is... m= m(load)+1/4m(beam) I'm wondering if this link might help you ;-) http://w…
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Not to any appreciable extent. Bounce is caused by the elasticity of the material comprising the ball and the surface on which it is bounced. For example, on concrete a basketball will bounce higher than a baseball, but a golf ball  -- How high it bounces depends on how much force you exert o…
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robotics has various parts such as :rocket roboticsmechanical roboticselectronic robotics etc...
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458.7 pounds Since a gallon of water weighs approximately 8.34 pounds, 55 gallons weigh 55 x 8.34 = 458.7 pounds.
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The process is called sublimation. Solids can turn directly into gases, and gases can turn directly into solid without ever being a liquid. Carbon dioxide (dry ice) is a common example of this. Other examples are mothballs, solid air fresheners (Air Wick), and iodine.
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Bad things. When your blood is circulating too hot, it affects everything. Your internal organs are stressed, as well as your brain. (which is why it's dangerous to have a high fever for very long) Your muscles start burning anything they can to function instead of oxygen, which results in them pro…
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Yes For two triangles to be congruent, their corresponding sides must be of equal length. But for triangles to be similar, they must only have equal angles. For there to be a SAS postulate for similarity, the two corresponding sides would have to be proportionate, not equal. If they were equal, the…
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A flashlight Answer chemical, in a sealed environment.
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"High tension" means the same thing as "high voltage." These chillers have greater capacity and are typically used in industrial and some scientific applications. Normal chillers are more widespread, appearing in air conditioners, refrigerators, and various other appliances.
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Heat energy, usually. However, some substances will change states under the influence of UV or other radiation.   The energy needed to change a material from a solid to a liquid is called the 'latent heat of fusion', or just the 'heat of fusion'. It is equal to the amount of energy or heat gi…
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1 hectare= 0.01 square kilometers   Hectares are used in farm lands to check how much area has been cultivated.1 hectare = 0.01 km^2
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A nucleus of an atom can be compared to the sun of a solar system because the nucleus, like the sun, is the largest part of an atom and its electrons orbit around it, much like planets in a solar system. Atoms can also gain or lose electrons similarly to how stars can gain or lose planets.
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Night Goggles A beam of infrared light is sent out which is invisible to the human eye. However just like a digital camera the goggles can pick up the infrared light and convert it into the visible spectrum and display it on an small lcd screen inside the goggles. Wearing these on guard duty a co…
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An swer Most hurricane deaths are from drowning. In Addition: Storm surge is what kills most people in a hurricane. The storm pushes water to the shore and causes a wave of 5 to 25 feet which inindates the shore and the inland. Tornadoes are an aftermath of the storm.
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Chaos theory is a field of applied mathematics with applications in many related fields, including meteorology, economics, and even philosophy. The basic premise is that small differences in the initial conditions of a system yield widely-varying outcomes, precluding attempts at longterm prediction.…
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The phrase relates to chaos theory. It's one of those coined sound bites that reporters love because it sounds good, while not really contributing much accurate information (like "the information superhighway" being used to describe the internet). The more accurate name is "sensitive dependence on i…
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No guaranteed answers, but maybe I can start the ball rolling for discussion on this one. Dogs have noses that are 1000s of times more sensitive than ours, right? So I'd figure that anything we find strong-smelling would be really strong for a dog. So ground pepper would seem logical? I think this i…
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Yes, you can, but it's dependant on a few things. First, you must have enough air in your lungs to blow it up. Second, there DOES come a point where the pressure from the outside water is greater than the rubber can bear, and it explodes. That's bad for you, because the air might be shover back in y…
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The yellowcake is the ammonim diuranate with the formula (NH4)2U2O7 !
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A Discussion exists about this question. Click the View Discussion button below this answer to view it and take part. <><><> Whilst the question simply asks what the smallest number is, mathematicians define and discuss numbers in different ways depending on the needs of the pr…
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Answer The most commonly used base is 10,
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No. The physics is based in the way light is scattered in the air, and it is discussed in the question, "Why is the sky blue?" That question is linked below. AnswerIf that were true, there wouldn't be any blue skies in Kansas. And there are! Actually, the coloring in the sky that you observe is a r…
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Cold water requires a higher temperature elevation than warm water does, and therefore will take longer to heat to boilinIf you start with hot water there is not enough difference in temperature from top to bottom to create an effective convection loop, because hot stuff only rises while in the pres…
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Here are 3 definitions:A place where scientists store DNA information from plants and animals so that they can use it to reintroduce desired genes back into a gene pool at a desired time.A facility established for the ex situ conservation of individuals (seeds), tissues, or reproductive cells of pla…
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Metallic bonding speaks to the the "sharing" of the free electrons (sometimes called delocalized electrons) in a metal structure on the atomic level. It might be better characterized as the dynamic interaction between the atomic nuclei of the metal and those electrons that are not "locked into" the …
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Answer Bread yeast turns sugar into alcohol. Many microorganisms produce toxins that keep other microorganisms from taking over a food source. Staphielococcus, Penicillium Notatum and Clostridium botulinum are other examples of microorganisms that produce toxins to protect a food source. Some of …
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Answer The proper suction pressure of any air conditioning or refrigeration system is determined by the type of refrigerant used and sometimes the amount of charge. Suction pressure used is also directly related to the temperature required. The temperature required in the evaporator relates …
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If all of the trees were gone, we wouldn't have a very high oxygen content in the air. Less oxygen less humans. Answer If all the rainforests were destroyed the world would practicly be destroyed because if there are no trees there will be no humans and no humans is no world.  Answer The re…
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A triple-beam balance. Since grams are used to measure mass, which is independent of gravity, a balance is used. That way, no matter the gravity, the correct mass is given. Yes, there can be scales made, specific to earth's gravity that would measure mass, but they would only be accurate on earth. …
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Answer you have to remove the panel above the wipers from outside the car ..once removed you can acess 3 bolts (you have to feel by hand) undo these also in the car the are 3 one each side and one in the middle under where the stero fits
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The movement of electrons.   Positively charged particles travelling away from negatively charged ones, in a suitable environment.   Actually, electrons do not move to create electricity. They simply pass a negative charge to positively-charged ions and this movement of charge is electr…
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Downhill (Alpine) ski races are usually day long event. Typically you will have either slalom or giant slalom all day long. You will need to different skis and equipment for each length.Let's say it's a day of slalom racing. Slalom racing is when the gates are closer together. Ski racers want to hav…
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Density of water The density of water is greatest at about four degrees C (39.2° F or 277degrees Kelvin) which is a density of 1.000 kg per liter (62.4 pounds per cubic foot). Liquids expand slightly as their temperature is raised, but liquid water is denser than solid water (ice). That is why ice …
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Density rho = mass m / Volume V. Water has a density of 1,000 kg/m3 = 1,000 g/L = 1.000 kg/dm3 = 1.000 kg/L = 1.000 g/cm3 = 1.000 g/mL at the temperature of 3.98 degrees Celsius. Temperature in degrees Celsius and the density of water: 1 ................. 999,90 2 ................. 999,94 3 ..…
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Answer The frequencies on which sonar is used vary widely. Human hearing is usually cited as ranging as from 20 cycles per second (Hertz) to 20,000 cycles per second. There are many sonars that use frequencies in the 20 to 20,000 Hertz range. In general, the sonars that are used for short range u…
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Answer You can tread water longer because your body is more bouyant in the salt water. You don't have to work as hard to keep afloat, so it takes longer to get exhausted to the same degree. However, another factor must be taken into consideration, and that's temperature. The colder the water,…
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On the internet, SEM stands for "Search Engine Marketing". In it's most basic form, SEM includes any type of advertising that takes place within a search engine, hence the phrase "search engine" marketing. Search engine marketing may assume any form within a search engine but the two most common fo…
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A Physicist has a degree in Physics, a Chemist has a degree in Chemistry.A Chemist can also refer to a Pharmacist as it is an old interchangeable term since pharmacists were the original chemists in developing concotions and medicine.  A physicist thinks they know more chemistry than they actu…
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Answer Modern hotpads or pot holders have a heat-resistant material sandwiched between two layers of fabric. The bottom layer of fabric, and the lining, get hot, but the top layer next to your hand stays cool.
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Ph.A. Zaitzev was a world famous entomologist. . ^^ it help with S.O.T.M Mrs. j's class
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The average IQ for anyone is 100. It forms a bell-shaped curve. Stand deviation is 70-130 I think, but don't quote me on that. IQs are adjusted for age. There is no such thing as a perfect IQ test. But lets pretend there is one. If you took this ideal IQ test at any point in your life, you would get…
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In particle physics, things pop into and out of existence all the time from so called nothing. But "nothing" is an illusion. There is a thing called "vacuum energy" that is not understood. What appears to be nothing is teaming with energy. Einstein showed that matter and energy are interchangeable -…
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Answer The dryer may be heating more than you think. Has the vent pipe ever been cleaned out? I had to have mine cleaned by a chimney sweep last week and it now works like it used to. There also is a great danger (that I never thought of) in the vent being clogged. It could possibly catch fire an…
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The "color" white is simply the reflection of all other visible wavelengths of light. Snow is frozen water. The "white" is ice, which melts above 32 degrees Fahrenheit, or 0 degrees Celsius.
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Logically speaking sand is also a type of soil in which belong to the 3 textural fraction know as Sand Silt and Clay. This textural fraction makes up the Soil Texture. (Sand, Loam, and Clay). We consider a soil as sandy when it contain 70% or more sand. Clay when it contains at least 40% of Clay.…
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Answer (Educated guess) More than likely because the antennas used have a radiation pattern of 60 degrees. Thus 6 are required for full 360 degree coverage. Clarification If you look at the top of a cell phone tower, you will see the vertical arrays that constitute the antennas, usually w…
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In the Sci-fi terms that define what a light saber 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 alight saber because... well... it emits light. When you go home and …
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We breath out Carbon Dioxide gas which has the symbol CO2 It contains one atom of Carbon and two of Oxygen
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The gravitational force is a very weak one. Actually we only feel earth's gravitational field because the earth's mass is huge. So is the gravitational field of stars and astronomical bodies. But since the objects we usually deal with have really small masses, it's gravitational force is so weak tha…
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Get a top that has a backing to the outer fabric..   Hi there, thank you for your reply. How do people then wear those bikinis that has no backing? Do they wear a stick-on bra? And what about those laced lingerie? How do we wear those lingerie without the nipples showing, since it's complet…
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Gregor Mendel is called the father of genetics. He was a monk who studied pea plants to find out about genetics. He discovered many new things. A: Discovered the dominant and recessive mode of genetic inheritance  A: http://www.biojuris.com/natural/index.html (Exact quote)Gregor Mendel was …
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Answer There certainly is a cynical way of looking at the DISADVANTAGES of science. From a world view perspective, the world is becomming overpopulated because of the advances in medicine. People are living longer, mothers survive childbirth and live to have more children, men survive work accide…
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No, salt water does not evaporate faster than tap water. The evaporation of water is slower when molecules are dissolved in the water. Sea water is very salty and so will evaporate more slowly than tap water or pure water. If you have a very small amount of salt dissolved in water, then it has a s…
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Well, at least he didn't ask whether a pound of lead or a pound of feathers is heavier.   Um, this is a joke, right? A pound of anything, from feathers to stones, weighs a pound. In case it's a typo, and you meant to ask another question, a pint (two cups) of water weighs just under a pound, …
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This will depend on the country you live in. The best way forward is to consult the websites of the schools you are interested in, and if they don't give enough detail for you, then write to the admissions tutors.
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DisinfectantsDisinfectants are bacteria killers...but don't forget to... READ THE DIRECTIONS!!! Contact time is the Number one issue! Contact time kills the little germs/ bacteria...did i say contact time!!! popular products that say anti bacterial are Anti bacterial, however they must have adaquate…
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Answer Simple...the second dimension has 2 dimensions. Think of a coordinate plane... it has 2 dimensions... height and width. This plane is the only area that they can be on. If they were not on the plane they would be in a different dimension. So to answer your question... if it wasn't flat... …
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Answer Probably nothing, besides a few thousand sewer busts, lots of stincky gloop of everything that, well you get the picture. Don't you? If not, sorry. I hope that this answers your question. If not, sorry. Answer Do not try this unless you live on high ground. answer The peo…
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The sun doesn't actually move. Rather, the earth's rotation (at approximately 24 hours per revolution) makes the sun appear to "rise" and "set" as your position on the earth turns in relation to the sun.when one part of the Earth is facing towards the sun it would eventually become dark. this is bec…
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This is all thanks to Air pressure and water pressure. Lets say that you are drinking water from a glass with the help of a straw. When you suck at the straw, you are essentially drawing air out of the straw. This decreases air pressure which was in the straw right above the level of the water. In …
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Air has a pressure, but not a suction pressure. Air pressure is measured with a barometer, you do not calculate it. Suction pressure is a concept which applies to a pump. Suction pressure = static pressure + surface pressure - vapour pressure - friction pressure.
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Engineering is the process of putting things together to get a desired outcome, technology is engineering that has been proven to work over and over again. Technology is always improving due to the advances in Engineering.Engineering is creation of a new facility,machinery or establishment to produ…
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If you don't take into consideration the curvature of the earth, both should hit the ground at the same time. Both bullets would be affected by gravity at the same rate, (32 ft/sec/sec) even though the horozontal vector is greater, the vertical is identical.IF you have a bullet that is going fast en…
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Answer Many paints contain flammable substances, and spray painting is hazardous if painting mist comes into contact with a source of ignition. Possible sources of ignition include lit cigarettes, abrasive grinding wheels and other equipment that produces sparks, combustion motors, welding torch…
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Two Party System? Not for our Founders.The founding fathers wanted to create a government like they saw the Native Americans using as far as personal freedoms. This is seen in the Albany Plan of Union, written by Bejamin Franklin. They had other sources, and were also used to the Britsh Government, …
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No, uncooked rice will not cause any bird to explode. Uncooked rice expands by absorbing hot (usually boiling) water. Though the water doesn't have to be boiling for absorption to take place, absorption slows greatly at normal avian body temperatures. So, even if the water was available in the bird…
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the climate in Ghana is very hot very very very hot over 123 Fahrenheit
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go to an IQ taking website and they do it for you
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You probably have a poorly insulated section of pipe. It must be between the taps and the hot water source.
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Answer I would call that obligate mutualism. The microbes would be the normal flora of the plant/animal. Like rhizomes on plant roots that fix nitrogen or the E. coli in your intestine making vitamin K. symbiotics Answer I'm not sure if this question is a typo, but an "organism" is an ind…
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Not sure about this. All rivers run but many are unfit to drink. Most of us drink boiled water (at least as tea, coffee and beer) without a problem (unless we drink too much beer!). As long as water runs, its a safe temprature to drink. I would worry drinking boiled water (100 degrees celcius) I …
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Answer To do this you first have to calculate your ideal mechanical advantage (IMA). The IMA is equal to the effort distance (the distance from the fulcrum to where you will apply the effort) divided by the load distance (the distance from the fulcrum to the load). You can then set your IMA eq…
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an ion is basically a charged atom or group of atomsAn ion is any atom that has a positive or a negative charge. A positively charged ion will seek a negatively charged one to unite with, have a glorious 'coupling' and then turn into something totally new and available.So why do we rave on so much a…
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Answer well you can distill your water... this can help you get very pure and clear water.
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It would be safe to say that the authors of that book cannot be taken seriously. answer The authors of this book knew more about the world than early scientists. The book of Job says He stretcheth out the north over the empty space, he hangs the earth on nothing.Job 26:7. Astronomers recently…
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Answer Then you wouldn't have some of the comforts that you enjoy like Driving your Car Gas is created from oil. But man being the way he is we would find away round it. Like using Synthetic's instead of crude oils. Good Luck and Remember. Change Your Mind, Not Your Oil. Think of life back ar…
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Answer "Explain how Christian ideas are different from the scientific theories about the origin of the world?" By Harold S. Kushner (1981)--notes by Doug Muder (1997) offers the following: Best wishes 8. What good, then, is religion? [pages 132-148] "No one ever promised us a life free from pain and…
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cut off the gas pipe valve, or the circuit breaker in the main panel for an electric heaterElectric heater is always turned off at circuit breaker, but heater receives no heat and tank can freeze. To prevent freezing while on vacation, turn off electricity, open cover(s) on front of water heater, us…
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Two possible problems............... The main shut off valve in the house is closed from the in-coming city water supply line, or the city supply line is shut off at the street .
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By taking an IQ test
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An object is exerting a force when it pushes or pulls on another object.Objects commonly exert forces when they hit each other, as when a bat hits a ball.They can also exert a force with out touching. This happens when the object has "field" around it. Common fields are magnetic, electric or gravati…
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It could be related in geometry and physics. why do you think we have more strengh then weekness everyday?
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Most IQ tests are designed so that 100 represents the average score. Anything above that is considered, well, above average. The highest you're likely to encounter is in the 170-180 range, and anything about 150 is considered genius level.So 110 is a good, solid score. your average
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Flushing regularly! If it is an older tank and it hasn't been flushed regularly don't bother starting now do it on your next one. This ones days are numbered. You may want to do a water test to see if your water needs treatment.Ans 2 - Yes, flushing it regularly will help. as will changing the anode…
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Answer This is my best guess. The feezing point of chlorine compounds is much lower than that of water. So, by adding it to ice, it will lower the freezing point of the new solution much like etheleyne glycol does in the radiator of a car. However, bleach is much too corrosive to use in your car…
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