| Subject | Date Asked | Expert |
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| Forensic Science | 5/9/2006 | Ralph Salier-Hellendag |
Q: The question is related to a homework project concerning investigation. My case is to do with Mr ...
A: First of all, a pen and ink drawing could and very easily my have been signed in pencil. I would ...
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| anti | 5/9/2006 | Ralph Salier-Hellendag |
Q: I hope I'm finding you in the best of health. I saw places like Crabtree&Evelyn sell antibacterial ...
A: These products have a very high percentage of Methanol Alchol which is poisonous to any thing that ...
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| brake pads | 5/9/2006 | Ralph Salier-Hellendag |
Q: Car brakes work as a result of pressure between two rubber brake pads on each wheel. Why do you ...
A: Car brakes don't use rubber brake pads but rather a highly engineered material including bronze ...
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| Forensic Science | 5/9/2006 | Ralph Salier-Hellendag |
Q: I would like to know what kind of forensic tests can be used to determine the originality of (i) an ...
A: This is a little difficult to answer with out more information. First of all how old are these ...
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| science | 5/2/2006 | Dan Fink |
Q: What are the five questions needed for a hypothesis?
A: of which hypothesis is one of the parts: * Research * Problem * Hypothesis * ...
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| Question about science project on water cycle | 5/1/2006 | Ralph Salier-Hellendag |
Q: My 1st grader is doing the following project on the water cycle, and I was wondering if I could use ...
A: I understand your concern. Glass does work best because of the way it holds heat vs plastics. But ...
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| nutritional plants | 4/23/2006 | Ralph Salier-Hellendag |
Q: why do humans eat certain plants
A: Plants come in three varieties. 1) edible, 2) in-edible and 3)poisonous. Over the last 100+ ...
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| magetic project | 4/18/2006 | Dan Fink |
Q: I am trying to come up with a new twist on a science fair project using magnets. I don't want to ...
A: Full disclosure: I work for a company that sells magnets and the stuff for magnet experiments, ...
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| science | 4/10/2006 | Dan Fink |
Q: what happens to sound when it hits something soft?
A: When sound waves hit something soft, more of the energy in the wave is absorbed and turned into ...
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| sinking and floating | 4/10/2006 | Ralph Salier-Hellendag |
Q: when a boat is floating in the water what is the name of the forces that (a)keep it on the water ...
A: Among others is surface tension. But a boat floats because it is "hollow". The air inside keeps it ...
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| Warm breath and cool breath | 4/5/2006 | Dan Fink |
Q: I'm 7 years old and I was wondering why is my breath warm when I breathe out with my mouth wide open ...
A: What you are feeling is evaporation of the water in your saliva (spit)! It feels cool, since it's ...
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| Microbiology | 3/29/2006 | Ralph Salier-Hellendag |
Q: I have a very strong background in microbiology and my 7-year-old daughter likes to help me out with ...
A: It is a bit difficult given the age of your daughter. One way to test this is for you to get ...
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| SCIENCE PROJECT -6TH GRAD | 3/27/2006 | Dan Fink |
Q: WHAT EFFECT DOES PLACEMENT OF WEIGHT HAVE ON AN AIRPLANE'S FLIGHT?
A: Airplanes tend to rotate around their center of mass, both in pitch (nose up and down) and roll ...
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| salt dissolving in water | 3/27/2006 | Dan Fink |
Q: what is the rate and amount that salt dissolves in water at different temperatures?
A: It depends on a lot of different factors, so you'll have to set up an experiment and try it. Some of ...
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| Alt. Energy Art | 3/26/2006 | Dan Fink |
Q: Mr. Fink, peace. I am a medicine wheel artist. Alternative energies are like prayers to me. I am ...
A: It all depends on how much power you need to make, in what wind speeds. Car alternators are very ...
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| we are doing a project about... | 3/22/2006 | Ralph Salier-Hellendag |
Q: we are doing a project about plants. We would like to order a bacteria that harms plants then we ...
A: This kind of experiment requires fairly rigerous controls. There are several reasons for this: 1) ...
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| moon and gravity | 3/22/2006 | Dan |
Q: My question is regarding gravity on the moon and earth: What would happen if basketball players were ...
A: You ask a simple question with a complex answer. I recommend asking in our physics area for an ...
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| egg drop | 3/21/2006 | Dan Fink |
Q: I'm an 8th grader and have to do the egg drop. I have to use only 100 cm masking tape,100 cm ...
A: Be sure to read my previous responses on the egg drop -- maybe you did already, as padding is the ...
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| Magenn wind devices True or False? | 3/18/2006 | Dan Fink |
Q: Mr. Fink: Greetings, I hope everything is going well for you. I am a graduated chemecial ...
A: It does not look like an outright fraud. However, there is critical information missing from their ...
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| Science fair project | 3/16/2006 | Ralph Salier-Hellendag |
Q: ------------------------- 1)Are the plants in the dark yellow or discolored in any way? *Yes, ...
A: The potting soil may have water soluable nutriants which could be keeping them going. But it still ...
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| Science fair project | 3/16/2006 | Ralph Salier-Hellendag |
Q: 1) the two trays have the same kind of dirt mix? *Same potting soil from the same bag 2) the seeds ...
A: Phyll, This is most curious. The original hypothesis should be correct. Are the plants in the ...
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| Science fair project | 3/16/2006 | Ralph Salier-Hellendag |
Q: I am advising my 10 year old on his first Science Fair project. And we both are concerned about our ...
A: You do have an interesting and rather perplexing problem. Please respond to the following ...
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| Density | 3/12/2006 | Ralph Salier-Hellendag |
Q: What is density and how can you determine an object's density?
A: the density of something is defined by its mass per unit volume. For instance water is 1 gram per ...
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| Plant Question | 3/3/2006 | Ralph Salier-Hellendag |
Q: I was just wondering if I could have a detailed description of two plants adapted to their ...
A: Dry environment plants are often called "succulents" and include all of the Cactus family plants. ...
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| thermometers | 2/25/2006 | Ralph Salier-Hellendag |
Q: How did Fahrenheit and Celcius develop their scales on the thermometer?
A: [ Home Page | Message Boards | News | Archive | Books | Buy Stuff | FAQs, etc. ] A Staff Report by ...
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| hamster wheel bearing | 2/20/2006 | Dan Fink |
Q: My mom is trying to help me put togther a hamster wheel to produce electricity. I am 10. can you ...
A: There are so many different kinds of bearings out there that it's hard to give specific ...
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| Global Warming | 2/18/2006 | Dan Fink |
Q: I would like to find out in your opinion what are the facts that global warming is occuring,what is ...
A: I do believe the scientists who are saying that global warming is real, and that temperatures are ...
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| Global Warming | 2/18/2006 | Ralph Salier-Hellendag |
Q: I would like to find out in your opinion what are the facts that global warming is occuring,what is ...
A: Global warming is occuring. Its causes are varied but for many, it is in part caused by the buring ...
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| physics and sports | 2/14/2006 | Dan Fink |
Q: I am trying to do a physics experiment for my 5th grade science fair project. I want it to involve a ...
A: Sounds fun! You definitely want to cover conservation of momentum, where if the basketball did not ...
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| why ceramics are good insulators | 2/14/2006 | Ralph Salier-Hellendag |
Q: I am doing an investigation into insulating properties on a cup of boiling water. I have explained ...
A: Oh yes, there are many reasons why ceramics and even foam act as improved insulators over tin or ...
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| where can i find copper and zinc strips? | 2/9/2006 | Dan Fink |
Q: do u know were i can find copper and zinc strips for my sciewnce fair project because i need to ...
A: I've made LOTS of potato and lemon batteries in my career as a mad scientist! Galvanized nails work ...
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| Science fair ideas | 2/8/2006 | Ralph Salier-Hellendag |
Q: Do you have any ideas for our 5th grade son's first science fair project? Looking for something not ...
A: There are lots of great ideas for science fair projects to be found a the local public library. ...
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| evaporation | 2/5/2006 | Dan Fink |
Q: DAN I NEED TO KNOW ABOUT EVAPORATION FOR MY SONS PROJECT WE PUT TAP WATER,SALT WATER,AND POP IN ...
A: Your experiment is better suited for determining the freezing/melting point of each liquid... The ...
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| Hamster Powered Night Light | 1/29/2006 | Dan |
Q: I am building the hamster powered night light I saw at otherpower.com for my science fair project ...
A: I have not done this project, however I am told that such an idea could work, if done right. ...
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| Science, Medicine and Technology | 1/29/2006 | Dan |
Q: What is the relevance of Science, Medicine and Technology to the development of the Amercan society
A: There are a number of reasons why science is important. Medicines help people get better. Science ...
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| Science, Medicine and Technology | 1/29/2006 | Ralph Salier-Hellendag |
Q: What is the relevance of Science, Medicine and Technology to the development of the American ...
A: In many ways, it is what drove American society. This is especially true from the late 1800's ...
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| science fair rules | 1/28/2006 | Ralph Salier-Hellendag |
Q: I'm a parent that has taken over the science fair this year at my daughter's gifted school...I do ...
A: Congratulations on taking on this very important and vital role in the education of your children ...
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| Science Project Help | 1/28/2006 | Dan |
Q: My name is Tommy, and I need your help with my project in science. I will only need to contact you a ...
A: It is probably better for you to ask in our science project area, or in one of the areas of science ...
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| leverage | 1/27/2006 | Dan |
Q: Our middle school class went to a museum where there was a long pipe with a car engine on one side, ...
A: Your asking about the pulley system, right? This gets into "mechanical advantage". I recommend ...
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| Egg Drop Competition | 1/26/2006 | Dan Fink |
Q: I was wondering what would be the best way to build an egg drop device. We can use basically any ...
A: I've included a past answer of mine to that question. If you are not restricted in your choice of ...
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