Science Experiments

Posts Tagged ‘science’

Question: What are some Science Experiments/projects/report that I can do in 1-4 days?

and that will get me good-average mark thanks

Answer: Build a homemade solar cell. The only supplies you need are a stovetop, two sheets of copper flashing from the hardware store (should cost about 4 dollars a piece for shingles), a soda bottle, salt water, two aligator clip leads, (at the hardware store for less than a buck), and (optional) a amplitude meter to read how much power you are generating. There is a procedure on how to do this online and it is very simple, I did it in about 3 hours and it is really cool. Heres the link for the procedure, http://worldwatts.com/homemade_solar_cell/homemade_solar_cell.html BTW, im not spamming for the site because I have no relation to it. Try this project its fun and has a cool result, because if you tell your teacher that you are interested in making alternative energy sources then she will be very pleased.

Science Experiement – End of the World 10 News 10-9-2008

Question: Is there anything that is none electrical that would block a magnetic field?

I’m doing a small experiment with my son for a science project and we are looking for magnetic resistance in typical household objects. So far we have found nothing. Glass. plastic, paper, water, nonferrous metals, wood, you name it. Of course it depends on the thickness of the material and the strength of the magnet. We are working with small neodymium magnets.

Answer: There exist several nickle-iron (plus some other impurities, like molybdene) alloys that can do that: mu-metal, permalloy, supermalloy, nilomag, sanbold. Mu-metal is often used for shielding of magnetic fields in household appliances.

magnets experiment

Question: Dangers of nitrogen, carbon dioxide gas?

i was watching Cool Science Experiments that involve liquid nitrogen and solid carbon dioxide.. it makes a cool smokey effect.. however, i was wondering if we play with the carbon dioxide gas (fog from the solid C02), we will breathe in C02 and danger our health..

so.. i was wondering.. does liquid nitrogen gases (the fog) affect in any way?

Answer: The gas part has been covered. How about the Temperature of liquid nitrogen? It is soooo cold you need a special container for it…and gloves. Because if Liquid N2 comes in contact with your skin, it will INSTANTLY freeze it, and this is not your everyday freeze…it will HURT as your tissue & cells freeze beyond the point of repair. Cystalization damage will occur. People who freeze themselves thinking they’ll be able to thaw out in the future are dreaming. We have yet to figure out how to properly thaw an organism frozen to that cold of temperatures without severely damaging body parts. Just be careful of the liquid, probably even more than the gas.

I’ve watched professionals stick their face in N2 gas….its all about the air flow in the room your in…bigger the room and the more turbulent the air flow (windy), the better you’ll be.

Nitrogen is a very heavy gas, more so than CO2…both fall to the floor. It is not a good idea to have small children playing on the ground near the clouds. They are small enough to be enveloped in gas. The motion of the child and air flow will move the gas quick enough not to pose a death threat, but come on, they’re our kids for chrissake!!

Solids Liquids & Gases