| Subject | Date Asked | Expert |
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| density | 11/22/2006 | Ralph Salier-Hellendag |
Q: i got to do a density report but i need more information on density could you help me ?
A: I will try to help you but your question is very broad. First of all density is how tightly the ...
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| energy and motion | 11/21/2006 | Dan Fink |
Q: if jessica walks around the block and bob runs around the block, who does more work?
A: they did the same amount of work walking or running around the block, measured in Joules. Work is ...
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| Insulating a shoebox | 11/20/2006 | Ralph Salier-Hellendag |
Q: Hey, In school, I am doing a project to insulate a shoebox with two uncovered windows 5L X 2W. I am ...
A: I'm sorry it took me a while to answer, I've been out of town. Styrofoam is the best stuff to use ...
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| magnetism | 11/19/2006 | Dan Fink |
Q: Ok, so how would I do that? Should I wait until the magnet doesnt attract anymore paperclips, and ...
A: I think you are all set for this project now, Faiza. Yes, removing it from the water will give you ...
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| magnetism | 11/18/2006 | Dan Fink |
Q: haha! Yes but for my science fair, I'm trying to find out which substance has the greatest effect on ...
A: It's fine for a hypothesis -- I think what will happen is that with the denser liquid, the magnet ...
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| magnetism | 11/18/2006 | Dan Fink |
Q: Okay, so since the liquid is more dense then just plain water, there's more buoyancy. So that will ...
A: The denser liquid doesn't so much help them float as it does reduce gravity's effect on them, so the ...
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| Hamster speedometer project | 11/18/2006 | Dan Fink |
Q: Hey dan, I am wanting to connect a bicycle speedometer to my hamster wheel for watching speed, ...
A: it was 540 mm in circumference and the computer took that number just fine. Otherwise, your options ...
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| insulation | 11/16/2006 | Dan Fink |
Q: Why is bubble wrap a good insulator
A: conduction (items touching each other) and convection (air moving). Bubble wrap has air trapped ...
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| what is the percentagee of... | 11/12/2006 | Dan Fink |
Q: What is the percentage of oxygeon,nitrogen, and carbon dioxide in the air? Explain what would happen ...
A: Nitrogen = 78% Oxygen = 20% Carbon Dioxide = 0.035% If the gasses were to *suddenly* change ...
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| magnetism | 11/11/2006 | Dan Fink |
Q: Well I also found out that materials are attracted better in salt water than pure water. Since salt ...
A: Buoyancy is simply the difference in density between the object and the liquid it is in. So, in a ...
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| Heating nichrome wire | 11/10/2006 | Dan Fink |
Q: I want to heat a nichrome wire RED hot using a 6-12v DC. What would be the proper length, width, ...
A: A car battery could turn a longer, thicker piece of nichrome red hot than a small 9v battery could. ...
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| lipgloss | 11/8/2006 | Dan Fink |
Q: I want to know how u make lip gloss please and thank you
A: oil, flavor and color. You just mix it all up, warm it so it combines, and pour into your own little ...
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| Boiling water | 11/4/2006 | Ralph Salier-Hellendag |
Q: in my high school science class, we have a group project to boil water without fire. To produce ...
A: there are several ways to boil water. Using a Solar oven, heating rocks on a fire and then placing ...
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| Forensic science | 11/3/2006 | Dan Fink |
Q: what is Oxidation? What is the process of oxidation?
A: oxidation is the loss of an electron. Certain substances are said to be oxidizers--they force this ...
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| small heating coil | 11/3/2006 | Dan Fink |
Q: I am working with a group in my class to make a wind proof lighter like device. We are trying to ...
A: It all goes back to Ohm's Law - your experiments didn't work because the resistance wasn't high ...
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| How can I insulate a model house. | 11/1/2006 | Ralph Salier-Hellendag |
Q: In my science class we have to make a model house and insulate it. we also have to show if it does ...
A: You can demonstrate this several ways. Using a small 40 watt light bulb as a heat source inside of ...
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| heating element | 10/31/2006 | Dan Fink |
Q: i want to heat the bottom of a plastic bowl, what kind of heating element do you suggest. I just ...
A: or you'll melt the plastic! Go to your local greenhouse or garden supply center and ask if they sell ...
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| Advanced 3rd grade science | 10/31/2006 | Dan Fink |
Q: My eight year old daughter presented me with this homework problem: Would it take more force to ...
A: This is a very interesting question -- congratulations to the teacher who asked it! I really had to ...
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| Carbon cycle | 10/31/2006 | Ralph Salier-Hellendag |
Q: For a school science assignment our class has to explain the carbon cycle. But I just don't get it!! ...
A: The Carbon Cycle is the biochemical process by which carbon is exchanged between the atmosphere, ...
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| SCIENCE | 10/27/2006 | Dan Fink |
Q: I READ ABOUT AN EXPERIMENT - BOUNCING BALLS WITH NAPTHLENE BALLS ADDED TO ACITIC ACID SOLUTION THEN ...
A: Napthalene doesn't react to form Carbon Dioxide (CO2). Actually, the only reason the mothballs are ...
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| Measuring Carbonation Using Everyday Household Products | 10/26/2006 | Ralph Salier-Hellendag |
Q: How do you measure soda carbonation using everyday household products?
A: Using a large mixing bowl and a measuring cup, a length of fish tank tubing and silly putty. Fill ...
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| SCIENCE PROJECT | 10/26/2006 | Ralph Salier-Hellendag |
Q: WHICH FREEZE FASTER? SUGAR WATER, SALT WATER OR PLAIN WATER WHICH WEB SITE CAN I USED TO DO MY ...
A: I noticed that you scored my answer with a 7 for knowledge and 7 for clarity. This is a science ...
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| carbonation | 10/25/2006 | Ralph Salier-Hellendag |
Q: i need some major previously found info carbonation in club soda for a review of the literature. do ...
A: Carbonation in most sodas are very similar in terms of volume. This is because the water containing ...
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| MAGNETS | 10/14/2006 | Ralph Salier-Hellendag |
Q: What are Magnets? What are some good magnets experiments which can be done at home? I am Eight ...
A: Magnets are generally made out of iron or a combination of iron, niobium and other metals which can ...
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| egg drop experiment | 10/14/2006 | Ralph Salier-Hellendag |
Q: I need some complex answers cus it looks kule for an assignmant there are no limits to my materials ...
A: 30 x 30 x 60 what? mm? inches? feet? You can use nearly any material for an egg drop. I used ...
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| science fair | 10/12/2006 | Dan Fink |
Q: what is in nail polish to make it dry so fast
A: leaving the other ingredients behind. Ethyl Acetate, Butyl Acetate, toluene and isopropyl alcohol ...
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| Carbonation in Soda | 10/11/2006 | Ralph Salier-Hellendag |
Q: I need a really detailed way of testing carbonation in soda. Can you please help?
A: I'm not sure what you mean by testing carbonation in soda. Do you mean how much is in soda? That ...
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| sceince fair | 10/10/2006 | Ralph Salier-Hellendag |
Q: ok, what makes nail polish dry so hard, what type of ingrediant is in it???????????
A: There are several polymers (kinds of plastics) in nail polish. These plastics dry very hard (like ...
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| keeping water hot | 10/10/2006 | Dan Fink |
Q: I am doing a project for schol. We have to keep an aluminum can full of 40 degree C water hot for an ...
A: There are 3 main ways that heat is transferred: Radiant (like hear from a campfire warming you), ...
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| carbonation | 10/6/2006 | Ralph Salier-Hellendag |
Q: i saw the measuring of carbonation answer, how do you know how much carbonation is in there? how ...
A: Well I can't email you with out your email address. But that's ok. There are several ways to ...
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| Question on Goldfish behavior | 10/6/2006 | Dan Fink |
Q: im trying to find information on Goldfish's behavior but i can't find any can you give me some ...
A: so I can't help personally -- but did you try googling it? I found a TON of good pages about ...
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| hamster science | 10/5/2006 | Dan Fink |
Q: how much horsepower can a hamster generate?
A: The problem with measuring the potential output of a hamster is its willingness to run as you crank ...
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| goldfish behaviour | 10/3/2006 | Ralph Salier-Hellendag |
Q: I have 4 goldfish in a 2ft. fishtank. In the last 24 hours one of the larger fish has been chasing ...
A: Sounds like a problem of territoriality. The one doing the chasing may be going after another male ...
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| hamster power | 10/3/2006 | Ralph Salier-Hellendag |
Q: is it possible for all electric power to be replaced by all of the earths domestic hamsters?
A: One would think so given the time they spend in their excercise wheels. But, unfortunately, no. ...
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| science | 10/3/2006 | Ralph Salier-Hellendag |
Q: friction is a force that slows things that are moving horizontally on the ground.What are some ...
A: Not only horizontally but vertically and every other way. The only place you don't find friction is ...
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| Making smoke with chemicals | 10/3/2006 | Ralph Salier-Hellendag |
Q: Good Morning! I have a 7 year old son who has a extreme interest in science, and I'm trying to keep ...
A: Yes, it is the same stuff and should work in the same way. Since I don't know where you live, I ...
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| Making smoke with chemicals | 10/2/2006 | Ralph Salier-Hellendag |
Q: Good Morning! I have a 7 year old son who has a extreme interest in science, and I'm trying to keep ...
A: Muriatic acit and ammonia will produce a rather noxious smoke which will be rather unpleasent for ...
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| mineral volume in rocks vs. powder | 9/29/2006 | Ralph Salier-Hellendag |
Q: I really appreciate it. I'll try it with the scale. I wonder if there is air inside the rock. i'm ...
A: I"m not sure why you need money but remember, since you know that it is fools gold (Pyrite), it ...
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| mineral volume in rocks vs. powder | 9/29/2006 | Ralph Salier-Hellendag |
Q: I'm 7yrs old. I've been grinding up fool's gold rocks to dust and i'm noticing that such a small ...
A: It depends on how you are grinding it up. It could be that if you are using a grinding stone on a ...
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| INVENTION CONVENTION:HELP!!!!!! | 9/28/2006 | Ralph Salier-Hellendag |
Q: !! i'm really intrested in the last idea u gave me and the 2nd one sounds reallyyyyy cool!!! I like ...
A: Glad I could help. On the first idea, you can use flip flops and using the same kind of foam cut ...
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