Science Experiments

Posts Tagged ‘diy’

Question: SCIENCE FAIR PROJECT help! That potato experiment…?

I wanna do something with like a potato and a sweet potato. Like which one conducts electricity the best? You know that experiment with the potato (or lemon & lime maybe) making something work, but I forgot?

OR JUST GIVING ME A WEBSITE WITH MIDDLE SCHOOL: 8TH GRADE PROJECTS I CAN DO… I only have 12 days. Lol…

Answer: The secret to the potato clock is not in the potato, it’s in the electrodes that are stabbed into the potato. They’re made of different metals that react electrochemically. The potato is only a buffer across which the metals can react at the correct speed to run the clock.

A more interesting project might be “batteries from common household objects.” According to the rules of the thing, you probably have to arrive at a result by experimentation.

Electric Circuit Experiments With Jell-O, Lemons & Potatoes : Electric Circuit Experiments: High Voltage Ethanol in Flames

Question: The Vatican and science: would you like to perform a fun experiment?

Here’s a quote from a NYTimes article:

“In 2003 a senior Vatican official claimed condoms had tiny holes in them through which HIV can pass, exposing thousands of people to risk.”

Now for the experiment:
Take a condom.
Fill it with water.

Does the water stay inside?

And now, fun fact: a water molecule is approximately 10 000 times smaller than a virus.

Have a nice day!

Answer: What I think the pope was trying to say is tht condoms dont have a 100% success rate (cause they do break) where as absistaince dose.

But having said that the pope is living in a fansty land where no one has pre-martial sex.

Brian Cox: What went wrong at the Large Hadron Collider

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