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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
If water instantly vaporizes in space why do comets last for so long?
Comets are made of ice, dust, and rock. When a comet approaches the sun, the heat causes the ice to vaporize, creating a cloud called a coma and a tail. This process can make comets visible from Earth for a long time even though their ice is being continuously vaporized.
Does bread with peanut butter mold faster than bread with jelly?
It depends on various factors such as storage conditions, moisture content, and preservatives present in the peanut butter and jelly. In general, both bread with peanut butter and bread with jelly can mold at a similar rate if not stored properly.
What is physmatology and how is it studied with borosil mansingh survismeter?
The physmatology stands for Physicochemical technology of material sciences. It structurally characterizes the molecular mixtures prepared in different polar media.
Currently biotechnology stands for science and technology of routine activities but the physmatology is unique and faithful device.
physmatology and friccohesity go hand in hand and are being measured with borosil Mansingh survismeter. The science grows in a manner that talent and creativity also grow mutually.
What is the tallest ten year old?
5 foot 3
No, it would definitely be much taller, probably around six feet tall.
im 10 and im 5 foot 9 inches
How purple light affects plant growth?
We've had local food, organic food, slow food and even urban farming. Now get ready for disco farming.
The Dutch "plant control freaks" behind PlantLab want to farm indoors under purple light. It's not just for the looks, though. PlantLab has recently developed a set of technologies for optimal indoor farming so that food can grow anywhere from the sunless heart of an office building to an abandoned factory. Picture a 5-star hotel for lettuce, as opposed to the motel provided by a standard glasshouse.
PlantLab stacks "Plant Production Units" on top of each other to make maximum use of space. Plants don't need the entire light spectrum of sunlight to produce energy, so PlantLab uses LED lighting which emits only blue and red light, giving the growing rooms a weird, disco-like atmosphere.
Because of the indoor growing environment, no pesticides are required and 90 percent less water is used than in greenhouse growing. In the traditional glasshouse, the temperature rises when the sun shines on the glass so the plants need to be cooled with water. Inside a Plantlab growing room, the temperature is much lower and the conditions are kept constant, eliminating the need for water-based cooling.
Automation software controls the environment to provide each plant with optimal levels of light, water, heat, humidity and nutrition and dozens of other growing parameters. The company has developed mathematical models, called Plant IDs, for each plant type, which automatically control the 56 different environment parameters in a production unit to ensure optimal growth.
The first indoor city farm using PlantLabs' technology will be in a disused factory in Amsterdam. It's run by Philip Traa and NwA architects.
"We are starting a cooperative," says Traa, "where Amsterdam members pay us a membership fee every year and then buy the vegetables at cost. Indoor farming must be transparent for customers so they can come and see and taste in our city farm."
The first crops are lettuce, herbs, tomatoes, peppers, herbs and cress. Harvesting will start at the end of 2011. The farm will provide 2,000 Amsterdammers with a regular supply of vegetables.
The advantages for cities could be considerable, in terms of reducing traffic and making better use of currently disused space. Amsterdam, for example, has 1.4 million square meters of vacant office space.
"If you grow in the middle of the city where the market is, you have less transportation and lower CO2 emissions," explains Traa. "A glasshouse is only one floor. We can grow on 100 floors in a skyscraper, or in the heart of the building, since you don't need sunlight. Solar panels on the side of the building can provide energy for growing."
Globally, Traa sees the Middle East as the biggest potential market because outdoor growing conditions are so harsh there. Other high-potential areas are China, South Korea and Japan. "Japan has little farmland. China has so many people to feed in the cities. South Korea has both big cities and not enough farmland," Traa explains.
PlantLab's approach to growing food indoors currently costs more than alternatives like glasshouses, since LED lighting is expensive and a considerable amount of energy is required to run the plant production units. The Amsterdam farm will use approximately 1 megawatt of electricity per year, the equivalent of around 1,000 homes.
"To be sustainable, that megawatt needs to be green," Traa maintains. "We think the energy required will be 25-30 percent less in 2 years."
But the energy requirements of the plant production units could be offset by location. A large part of the energy currently used in food production is spent on transport, with supermarket fruit and vegetables clocking up massive numbers of gasoline-powered food miles. Also, LED lighting and solar panels may get cheaper while oil prices are likely to rise, which should increase the attractiveness of PlantLab's solution. Also, since indoor growing is predictable, food can also be grown on demand leading to less waste and stable pricing.
PlantLabs' vision is a strange combination of hyper-intensive farming with local growing using no pesticides. It's energy-intensive, but then so are glasshouses and flying in blueberries from Africa. 1 billion people already don't get enough to eat and the world needs to produce 100 percent more food by 2050 to feed the growing population.
"When you want to feed the world you need to grow intensively," says Traa. "The organic way is only a solution in the Western world."
The green heart of the future city may be in a sunless baseme
How much water should you use to make an object float?
The amount of water needed to make an object float depends on the object's density and volume. The volume of water displaced by the object should be equal to or greater than the volume of the object for it to float. Adding more water will increase the buoyant force.
Describe two ways that fossils can form?
By fossilisation and permineralisation.
Fossilisation is caused by layers upon layers of sediment burying the bones. As the layers of sediment above the buried bones increases, so does the pressure on the layers of sediment lower down. The pressure becomes so great that the bones and the sedimentary rock fuse.
Permineralisation occurs when mineral rich water trickles in through the sedimentary rock reaching the dinosaur bones. The minerals fill in the cracks and spaces within the bone. Sometimes the calcium in the bones may be replaced with these minerals. The new minerals in the bone make them even harder and more likely to be preserved.
Explain why Jupiter radiates more energy into space than it receives from the sun?
None of the scientist think that cold fusion can occure in any form of hydrogen. Fusion depends on density and temperature. So, hydrogen compounds and metalic hydrogen have hydrogen atoms much more closer than gas form of hydrogen.
On Earth, the cold fusion rate about 1 megawatt and my rough calculations for jupiter 3.000.000.000.000.000 watts.
How many people have solar panels?
Well, That Depends Alot Of People Have Solar panels.
Even People In Africa, Peru, And Chile, even schools... it always depends on where your looking.
What is an input for the process of photosynthesis?
Inputs: Light, Water, and Carbon Dioxide
Outputs: Sugar and Oxygen
Can water dissolve crushed garlic?
Yes, water can dissolve crushed garlic. When garlic is crushed, it releases its soluble compounds into the water, allowing them to dissolve. This is why garlic-infused water is used in cooking to extract its flavor.
What are the volcano which is classified in shield volcanoes?
A shield volcano is a type of volcano usually built almost entirely of fluid lava flows. They are named for their large size and low profile, resembling a warrior's shield. This is caused by the highly fluid lava they erupt, which travels farther than lava erupted from more explosive volcanoes. This results in the steady accumulation of broad sheets of lava, building up the shield volcano's distinctive form. Shield volcanoes contain low viscosity magma giving it flowing mafic lava.
Which property of light ray does not change in refraction?
The frequency of a light ray does not change when it undergoes refraction. The wavelength and speed of light can change, but the frequency remains constant. This is because frequency is a characteristic of the light source, not of the medium through which light is traveling.
Is it bad to plow a field with snow?
Yes, plowing a field with snow can damage the soil structure and lead to soil compaction. It can also hinder future plant growth by disrupting the natural ecosystem and potentially causing erosion. It is better to allow the snow to melt and naturally nourish the soil.
What is the first step when designing an experiment?
The first step when designing an experiment is to clearly define the research question or objective that the experiment aims to address. This will help provide focus and direction for the experiment and guide the selection of variables, methods, and analysis techniques.
What part of the cell structure controls replication of chromosomes prior to cell division?
The nucleus of the cell contains the genetic material, including chromosomes, and it plays a critical role in controlling replication prior to cell division. Within the nucleus, specialized structures such as the nucleolus and proteins involved in DNA replication help regulate the process of chromosome duplication.
Does alanine become a zwitter ion at pH 7.3?
No, alanine is neutral (zwittering, +H3NCHCH3COO- ) at pH 6.1. Actually I couldn't find any amino acid being neutral at pH 7.3
Alanine is anionic at pH 7.3 (H2NCHCH3COO-) , because it is above 6.1.
What instruments are used to determine the altitude of the north star?
Instruments such as a sextant or a quadrant can be used to determine the altitude of the North Star. By measuring the angle between the North Star and the horizon, navigators can determine their latitude.
The sun appears yellow because of the Earth's atmosphere scattering sunlight, which makes it appear reddish-yellow. In reality, the sun emits light across the entire visible spectrum, but shorter wavelengths (blue and violet) are scattered more by the atmosphere, leaving yellow and red light to reach our eyes.
What on earth is a Scleroscope?
A Scleroscope is a device used to measure the hardness of a material, typically metals. It works by dropping a hardened steel ball onto the material's surface and measuring the rebound height to determine the hardness value. This test method is useful for quality control and assessing the mechanical properties of materials.
William Herschel
Albert A. Michelson
Albert Einstein
Isidor Isaac Rabi
Lev Davidovich Landau
Murray Gell-Mann
Leon Lederman
Saul Perlmutter
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Everett Mark Hafner
Adrianos Melissinos
Eratosthenes
Why do students at school have to study Science if we don't want to become a scientist?
Studying science helps develop critical thinking skills, problem-solving abilities, and a better understanding of the world around us. It also provides a foundation for a wide range of careers beyond just becoming a scientist.
What makes different colours in a firework?
We did this experiment in chemistry (well something like it). There's different chemicals that is out into the powder. The chemicals react differently when exposed to heat therefore when exposed to the extreme heat of the small explosion, the chemicals give off a certain color. The color depends on the chemical.
What did Boyle observe in his experiment with gas trapped in a J-tube?
Boyle's experiment with gas trapped in a J-tube showed that when the volume of a gas is decreased, the pressure increases proportionally. This allowed Boyle to establish Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume at a constant temperature.
