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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
How do pnuematic systems work?
Pneumatic systems work, because they are pumped through the pipes and tubes with a enormous force. As they are travelling, they lose speed, but more pumps speed them up. The gas soon gets to its destination. Hopes this helps!!!
What are Anti knocking agent in fuel?
'Gasoline' has the potential to ignite too early ('detonate') in high compression combustion engines, producing a 'knocking' or 'ping' effect. The first compound discovered to remedy this effect was tetraethyllead (tetra-ethyl-lead, TEL). This anti-knocking agent therefore came into widespread use in petroleum, but use of this chemical began to be phased out after the toxicity of lead became known.
Thus other antiknock agents used instead of tetraethyllead are: ferrocene, iron pentacarbonyl, toluene, MMT (an organomagnesium compound) and several others.
What is the role of permanent magnets in a speaker?
The electromagnet is positioned in a constant magnetic field created by a permanent magnet. These two magnets -- the electromagnet and the permanent magnet -- interact with each other as any two magnets do. The positive end of the electromagnet is attracted to the negative pole of the permanent magnetic field, and the negative pole of the electromagnet is repelled by the permanent magnet's negative pole. When the electromagnet's polar orientation switches, so does the direction of repulsion and attraction. In this way, the alternating current constantly reverses the magnetic forces between the voice coil and the permanent magnet. This pushes the coil back and forth rapidly, like a piston.
Lumina is one of several forms of aluminum oxide, Al2O3, occurring naturally as corundum, in a hydrated form in bauxite, and with various impurities as ruby, sapphire, and emery, used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Also called aluminum oxide.
When paper burns what 2 materials are made?
When paper burns, it produces carbon dioxide and water vapor as the main materials.
What reacts with other pure substances?
When a pure substance reacts with another, it forms a chemical reaction where bonds between atoms are broken and new bonds are formed. This process can result in the creation of new substances with different properties than the original substances. The reactivity of a pure substance depends on its chemical composition and its ability to undergo chemical reactions with other substances.
How do you write longitude and latitude?
(latitude 4.60°N, longitude 101.07°E)
By using a degree symbols next to the number(the small cicrle that you put next to the temperture).
You would write the above co-ordinates as: 4°60'N 101°7'E
That's 4 degrees, 60 minutes
If you were going to make that even more accurate, you can add seconds to the minutes (e.g. 4°60'35"N)
° - degrees
' - minutes
" - seconds
I don't have a degree symbol on my keyboard. How do I typr the degree symbol?
Nuclear power plant are designed to convert nuclear energy into what type of energy?
Nuclear power plants are designed to convert nuclear energy into heat energy. This heat energy is then used to produce steam, which drives turbines connected to generators to produce electricity.
What element is used to make fireworks and medicines?
Strontium is the element commonly used to create the red color in fireworks. Phosphorus is used in the production of matches, as well as in some medications to treat conditions like osteoporosis.
What is the force you apply to a simple machine?
The force you apply to a simple machine is known as the input force. This force is used to perform work on the machine, such as lifting an object or moving a load. The output force generated by the machine is what ultimately helps to make the work easier to accomplish.
What are diamonds used for other than jewelry?
Diamonds are used in industrial applications such as cutting, grinding, and drilling due to their hardness and durability. They are also used in electronic devices as a semiconductor material and in medical equipment for their ability to focus and transmit X-rays.
How do you build a solar system model?
Check out these links: http://www.enchantedlearning.com/crafts/astronomy/solarsystemmodel/ http://www.exploratorium.edu/ronh/solar_system/ http://www.craftsforkids.com/projects/real_solar_system.htm
Why do you only change one variablle at a time in a science experiment?
Changing one variable at a time in a science experiment helps researchers to identify which specific variable is causing a change in the outcome. This allows for a clear understanding of cause and effect relationships and helps to draw accurate conclusions about the experiment. It also helps in controlling the experiment and minimizing confounding factors.
Why does more coils make an electromagnet stronger?
The illustration on the HowStuffWorks website is probably the easiest to understand. As you add coils to the electromagnet you have more and more magnetic field traveling in a certain vector (depending on which way current is flowing). It's much like a lot of physics...as you add horses to a plow the force is increased. As you add coils to an electromagnet the magnetic field increases.
As I said, check out this link for better understanding.
http://science.howstuffworks.com/electromagnet4.htm\ A wire with an electric current passing through it, generates a magnetic field around it, this is a simple electromagnet. The strength of magnetic field generated is proportional to the amount of current. if we were to increase the number of coils the strength of the magnetic field would increase, also increasing the strength of the magnet
Factors that can cause an observable change during the progress of an experiment are called?
variables
Aluminum is the common name of the element with the symbol Al.
Six grams of WATER is equal to 6 cc of water, but other things that are lighter or heavier will not make that equation. For example, 6 grams of lead will have much less volume than 6 cubic centimeters, and six grams of Styrofoam will have more volume than 6 cc.
Does white bread mold faster that wheat bread?
White bread does not necessarily mold faster than other bread. It depends upon the formulation, the quality of the ingredients and the conditions under which the bread was made, transported and stored.
What is the science behind scissors?
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What happens when exhaled air is bubbled into lime water?
When exhaled air is bubbled into lime water, the carbon dioxide in the exhaled air reacts with the calcium hydroxide in the lime water to form calcium carbonate, which causes the lime water to turn milky or cloudy. This is because carbon dioxide reacts with calcium hydroxide to produce calcium carbonate, water, and heat.
What will protect an egg from breaking at a 35 foot fall?
To protect an egg from breaking at a 35-foot fall, you can create a cushioning system around it using materials like bubble wrap, foam, or cotton balls inside a sturdy container. The container should be securely closed to prevent the egg from moving around during the fall, dispersing the impact force and absorbing the shock upon landing.
If you electrocute a cat will its tail point north?
sadly, no. the electricity will course through the cat's body, but the charge will do nothing but give fluffy a good jolt and a new hairdo. don't try this at home, though. you might kill the cat from the shock.
What is Thomas engelmann's experiment?
Engelmann shone light of different colores (wavelengths) onto filaments of Spirogyra. Spirogyra is an alga made up of filaments (chains) of cells. He added motile bacteria (which could swim) and which needed oxygen and observed where they went. He found that the bacteria clustered around the blue and red colours of the spectrum, where the Spirogyra were producing the most oxygen. So he concluded that these two colours were the most important for photosynthesis. For an animation of his experiment see: http://www.phschool.com/science/biology_place/biocoach/photosynth/action.html See also: http://en.wikipedia.org/wiki/Theodor_Wilhelm_Engelmann
What color candles burn faster?
It always depends on the size and shape of the candle. The rate at which a candle burns is dependent on the size and composition of the wick, and the thickness, composition, and melting / vaporization rate of the candle wax. Color is not the predominant factor.
Other observations
* It's not the color of the candle, but the wick. If the wick is cheap the candle won't burn correctly or will burn out shortly after you light it. If the wick is of good quality, it will burn down the center of the candle without once going out.
* Candles that are plain (white) may burn faster because they don't contain as many chemicals in the wax.
* There is a good reason why one candle burns faster than another... because it takes less time to vaporize the wax.
* The color would only make a difference in that respect if a significant amount of the heat (imparted on the wax) came from the flame's infrared radiation. Because the wax is used up by being heated by the flame (and eventually being melted, vaporized, and then combusted), the composition of the wax and wick will have more consequence than how much light energy the wax absorbs or reflects.
Does salt water or fresh water evaporate faster?
Fresh water evaporates faster because the dissolved salts in salt water raise the boiling point by strengthening the intermolecular bonds water molecules have with each other. It's why you salt pasta water--to increasing the boiling point of the water so you can cook it at a higher temperature (and season the pasta).
Adding salts also lower the freezing point of water, which is why people salt roads before snow.
