Science Experiments

In general, electromagnets are used to move things; whether it be ultra small things like molecules or super large things like locomotives or cruise ships.

MRI systems use electromagnets to "move" or at least change the polarity of molecules then measures the amount of electromagnetic energy created when the molecules move back. (yes, that's an oversimplification)

Tape recorders use electromagnets to move iron oxide molecules on a tape, forcing a specific magnetic orientation of the molecules that can be read when the tape passes a tape read head.

Electromagnets are used to move armatures of electric motors, and the armatures are connected to shafts that rotate, propelling a cruise ship or a locomotive.

Electromagnets "move" the electron beam of a CRT, allowing the picture to be displayed on older televisions.

That is just an example of a few uses of electromagnets. Keep looking, they are all around us.

Salt increases the density of water, making it more buoyant. When an object is placed in saltwater, its overall density will need to be greater than that of the saltwater in order to float, causing it to either sink or float differently than in freshwater.

David in the Bible had a catapult with which he beat Goliath. [religious scholars please correct] And the Australian Aborigines use catapults. The ancient Greeks are known to use beam catapults to harass their enemies. The place and date are probably several in each case.

One idea for a science fair project involving Oxy carpet cleaner could be to test its effectiveness in removing different types of stains (such as food stains, ink stains, or oil stains) from various types of carpet materials. Another idea could be to investigate the environmental impact of using Oxy carpet cleaner compared to traditional cleaning methods, focusing on factors such as water usage, chemical additives, and energy consumption.

An salt cube

nvm

nvm

Schumachere adds:

This is NOT the answer. If you look on different sites, you will find that the answer is a solid. A salt cube is an example of a solid, yes, but it is not the answer to this specific question.

Examples of sublimation include mothballs, where solid naphthalene sublimes directly into gas, and freeze-dried food, where ice crystals in frozen food sublimate without melting into water. Sublimation also occurs in the purification of some chemicals and in the creation of artificial snow.

Lye is a very strong base with a pH of 13.

Use a magnet to separate the iron,

Add the reaming mixture to water, the salt will dissolve, the pepper will float and the sand will sink- separate the pepper from the surface, filter the solution to retrieve the sand then evaporate the water to get the salt

Water bends (refracts) light waves.

The classic example is a pencil in a beaker of water. From air to water the pencil appears to bend.

So when a light wave in the air strikes water the light wave is bent towards the 'normal'. The 'Normal' is s perpendicular line through the interface of air to water.

The angle of a light wave in air, at the normal may be 60 degrees. As it passes into the water the angle becomes less to say 45 degrees to the normal.

The light waves are an electro-magnetic radiation and have a speed of 3.8 x 10^8 m/s in a vacuum. On passing in to a more dense medium, say air, it will slow down. Water being a more dense medium again, will slow down the light wave more.

A heat pump is a machine or device that moves heat from one location (the 'source') to another location, using mechanical work. Most heat pump technology moves heat from a low temperature heat source to a higher temperature heat sink.

Yes, different wavelengths of light all travel at the same speed in a vacuum, which is the speed of light (approximately 299,792 kilometers per second). This characteristic is a fundamental principle of physics known as the constancy of the speed of light.

Yes, different colors of light can affect plant growth. Blue light is important for vegetative growth, red light is key for flowering, and green light is least utilized by plants. Plants typically respond best to a combination of red and blue light for optimal growth.

The difference between a mixture and a solution is fairly subtle. A mixture is anything mixed together, for example, lemonade and cola mixed or shampoo and conditioner. When something is mixed, theoretically the two liquids could be separated again. In a solution, a chemical bond is formed between the molecules of the two liquids and they can not be separated by physical means, such as by a filter or centrifuge. In a mixture the components will retain their physical properties when combined. For example, a tossed salad is a mixture because, even though the lettuce and the dressing and the vegetables combine to make a salad, it is still clear what they individually are and they could, with some effeort, be separated out into piles of lettuce, tomato, and other ingredients.

All things being equal, the amount of noise a weapon makes with the same ammunition should be the same.

A gunshot may SEEM louder at night mostly because there is a lot less noise from other sources in the night. The decrease in background noise can allow the sound of a gunshot to carry much further.

Fire polishing the ends of tubes and rods made of glass seal small cracks, which help reduce the chance of fractures. This is especially important due to the sorts of harmful chemicals often placed within a glass tube.

Before I answer this question, let me explain what ecosystem means. An ecosysem is an area with populations of different species that interact with each other and its non living factors such as water and soil. In an ecosystem there are many food chains. An example of a food chain is: sun->plant->mouse->hawk. When human hunt the hawks the mice get over populated. That is how human effect ecosystems.

No, the color of water does not significantly affect its evaporation rate. Evaporation is primarily influenced by factors such as temperature, surface area, humidity, and air movement. The color of the water may absorb more or less heat, which could indirectly affect evaporation rates, but the impact is minimal.

1. metal
2. stone
3. pencil
4. concrete
5. paper
6. sand
7. rubber
8. foam rubber
9. plasticine
10. sugar
11. cold custard
12. computer
13. brick
14. house
15. chair
16. table
17. box
18. bottle
19. plate
20. bed

Hello- thank you for posting this great question. I am highschooler and I need to know that exact answer for my Science Fair Project. Please e-mail me, or write a comment here so I cna know. My project is due: January 25th, 2008. Thank you and PLEASE respond A.S.A.P.!!!!!

Mika May I've learned a bunch of stuff in my life and have never fallen from it. Leaning, however, is a different story. You can lean as far as your center of gravity remains centered then you either have to recenter your weight or you fall. Like when you bend over, you can only bend over so far before falling but if you stick one leg out behind you, you can bend over farther without falling.

Paper is a relatively poor insulator compared to materials like rubber or foam. While it can help mitigate heat transfer to some extent, it is not as effective as other insulating materials due to its composition and density. Fibrous materials like cellulose in paper allow some heat transfer to occur through conduction.

Rubber bands stretch due to the elasticity of the material they are made of. When a force is applied, the rubber band molecules arrange themselves to accommodate the force, leading to an extension in length. Once the force is released, the rubber band returns to its original shape due to its elastic properties.

ANY science fair project done by a girl is "girly." Don't be limited by gender roles. If you're like, "Science is haaard!", i would say a girly science fair project would be something like this example:how long does it take flowers to grow Another thought: collect several scents over a wide range of prices-- for women and or men. Figure out a way to test how long-lasting the scents are. Put a very carefully measured amount of each on something odorless, and get a few people to help with a subjective scale of how much scent is left. Test them after fixed lengths of time... You get the point. Match up the results with any info you can find on the contents of the scent. What is the basic 'medium' or 'vehicle' substance that forms the base of the liquid? I understand that some scents have bases that give up the scent notoriously fast. This would actually be interesting, and might yield some surprising results.

The "fog" generated from dry ice is a prime example of sublimation. Dry ice is actually solid carbon dioxide, which at room temperature goes directly from solid to gas, producing a fog-like effect.

solution is transparent whereas suspension is not transparent.

particles in solution are of size less than 100nm.but particles of suspension are of size more than 1000nm.solution is homogeneous mixture whereas suspension is heterogeneous mixture. solution doesn't exhibit Tyndall effect or brownian movement.but suspension exhibits it....

First stand up and cross one leg over the other. For right over left bend over to the right. For left over right bend to the left so that you body is sorta of forming a sideways V. Hold each side for at least 30 seconds. This is one of the only ways to help IT band friction syndrome.