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About Ralph Salier-Hellendag
(Top Expert on this page)

Expertise
Science Fair Judge for many years and experience with robotics, biology, chemistry, industrial processes, metalurgy and metal forming.

Experience
Science Fair Judge for many years and have helped several students get to state level competition. Most recently 2 of my students received state level awards and one went on to the nationals in Washington DC.

Education/Credentials
BA Archaeology - Anthropology
MA Business Anthropology

   

You are here:  Experts > Science > Science/Nature for Kids > Science for Kids

SubjectDate AskedExpert

olefactory nerves in nose7/21/2008Dan Fink
  Q: How often do the olefactory nerves in your nose change?
  A: ...it could be changes in the ability of olfactory signals to transmit to the brain. See: ...
pounds of pressure on lower back7/15/2008Sue Kayton
  Q: If I lift ten pounds off the floor and my uppor torso weights 105 pounds, how many pounds of ...
  A: People don't put "pounds" of pressure on their back. They put "pounds per square inch" on their ...
Do our senses really perceive the real world?7/14/2008Ralph Salier-Hellendag
  Q: I have read article from some website...and I have some issue concerning the existence of science ...
  A: We are conversing via email. I am human so is the person sitting next to me. Thus we have proof of ...
Do our senses really perceive the real world?7/10/2008Sue Kayton
  Q: I have read article from some website...and I have some issue concerning the existence of science ...
  A: Engineers and scientists see the world very differently from philosophers. Philosophers ask ...
Do our senses really perceive the real world?7/10/2008Ralph Salier-Hellendag
  Q: I have read article from some website...and I have some issue concerning the existence of science ...
  A: I understand your confusion. The premis of the U-Tube film in my view is nonsense. Yes every thing ...
Wat kind of wood7/9/2008Sue Kayton
  Q: Hi i need to know wat kind of wood floats to build an RC warship can u help me?
  A: Almost every kind of wood floats. To build a radio-controlled ship, usually people use spruce, pine ...
Solar Heat7/7/2008Sue Kayton
  Q: What is the highest temperature that can be reached inside an automobile setting in the sun?
  A: According to a US patent, the temperature can go up as high as 200 degrees, but this is very rare. ...
Do human visual and colour receptor work differently? do human have the same visual experience?7/3/2008Sue Kayton
  Q: I got another question on human vision -Does Human have the same colour vision receptor? Do they ...
  A: You can do controlled experiments showing people pictures of things. People with normal brains and ...
Do human visual and colour receptor work differently? do human have the same visual experience7/3/2008Ralph Salier-Hellendag
  Q: I got another question on human vision -Does Human have the same colour vision receptor? Do they ...
  A: My wife is a graphic artist and when she does a color correction to a photograph I have taken, the ...
Do human visual and colour receptor work differently? do human have the same visual experience7/3/2008Ralph Salier-Hellendag
  Q: I got another question on human vision -Does Human have the same colour vision receptor? Do they ...
  A: Normal eye sight is called 20/20 this means that an object of s specific size can be seen clearly ...
Do human visual and colour receptor work differently? do human have the same visual experience7/3/2008Ralph Salier-Hellendag
  Q: I got another question on human vision -Does Human have the same colour vision receptor? Do they ...
  A: Humans have color perception because of the types of receptors in the retina of the eye. Not all ...
Encouraging my scientific daughter7/2/2008Ralph Salier-Hellendag
  Q: My daughter, age 10, is going into the 5th grade and absolutely LOVES science. She won last year's ...
  A: Very good! I love it when a mom or dad want to encourage their daughters in the sciences. My own ...
Does every human taste receptor work differently? Do we enjoy the same kind of taste sensation?7/2/2008Dan Fink
  Q: I understand no human taste receptor work exactly the same,does all the normal human taste receptor ...
  A: Interesting questions! From what I can tell, you run into the same thing with smell--it's again a ...
Does every human taste receptor work differently? Do we enjoy the same kind of taste sensation?7/1/2008Sue Kayton
  Q: I understand no human taste receptor work exactly the same,does all the normal human taste receptor ...
  A: No, we don't share the exact same experience. People who smoke or chew tobacco can't detect subtle ...
Does every human taste receptor work differently? Do we enjoy the same kind of taste sensation?7/1/2008Ralph Salier-Hellendag
  Q: I understand no human taste receptor work exactly the same,does all the normal human taste receptor ...
  A: Good question. It will depend on several factors, first of all the nature of the food stuff and ...
Does every human taste receptor work differently? Do we enjoy the same kind of taste sensation?6/30/2008Sue Kayton
  Q: I understand no human taste receptor work exactly the same,does all the normal human taste receptor ...
  A: Some people have chemical disorders which cause them to experience different tastes than normal ...
Does every human taste receptor work differently? Do we enjoy the same kind of taste sensation?6/30/2008Dan Fink
  Q: I understand no human taste receptor work exactly the same,does all the normal human taste receptor ...
  A: There's no way of knowing, just like there's no way to know if 'green' looks the same to me as to ...
Does every human taste receptor work differently? Do we enjoy the same kind of taste sensation?6/30/2008Ralph Salier-Hellendag
  Q: I understand no human taste receptor work exactly the same,does all the normal human taste receptor ...
  A: I belive that most mammels and many other animals have taste receptors on their toungs. The taste ...
making ice blocks6/29/2008Dan Fink
  Q: expansionHi Dan, We are trying to make a perfect circle ice block that won't crack. We have ...
  A: Your best bet is trying to do it like the folks that make ice sculptures. In your freezer, the ice ...
Calcium6/22/2008Ralph Salier-Hellendag
  Q: for a school project we have to choose an element from the periodic table. we are asked to draw an ...
  A: When doing a chemical formula or when trying to determine the out come of a chemical reaction, the ...
chemistry6/21/2008Ralph Salier-Hellendag
  Q: what is the process of making dancing napthalene balls?
  A: Napthalene balls can be made to "dance" by placing them on a hot plate. This causes the naptha to ...
Soft Drinks6/10/2008Sue Kayton
  Q: I am from Australia and I am doing an experiment in class for soft drinks. Is there any way you ...
  A: A quick-and-dirty way to measure carbonation is to measure the pH of the soda. CO2 + H2O = carbonic ...
........6/6/2008Sue Kayton
  Q: how can you drop a egg without cracking?with:straws,toothpick,pipe cleaner,popsicle sticks,tape
  A: Wrap the egg in a little bit of tape, but not too thick. Then make a tight cage around the egg ...
Assignment on heat and stuff.6/5/2008Sue Kayton
  Q: For our semster 1 year 7 science assignment we have to insulate a can using everyday objects. we can ...
  A: The best, cheap, easily available insulation is styrofoam, but it's hard to make it the right shape ...
science6/4/2008Sue Kayton
  Q: what is matter and how do you measure it?
  A: Matter is the scientific word for "stuff". Everything you touch is matter. Dirt, water, wood, ...
how to make an investigatory project on energy conservation?6/4/2008Dan Fink
  Q: As you can see from the subject, I have to make an investigatory project on Energy Conservation. The ...
  A: -) An investigatory project is also called an experimental project. In this type of project you ask ...
Experiment with magnets6/3/2008Dan Fink
  Q: I'm like a kid and all and i can not find any good experiments for the science fair but i know i ...
  A: ). This page probably has the best collection of experiments that you can do with rare-earth ...
magnetism6/2/2008Dan Fink
  Q: My question is "How can magnets help archeologists?" please could you give me some info. thanks x
  A: Of course in archeology studying more modern events, where people had iron tools, magnets can be ...
Purge Dip System and Hydrostatic Pressure6/2/2008Ralph Salier-Hellendag
  Q: What is purge-dip system? How it works in concept of hydrostatic pressure? (Please help me further ...
  A: WOuld you be kind enough to tell me what the application of this purge dip system is? The ...
FACTS ABOUT FRICTION6/1/2008Ralph Salier-Hellendag
  Q: MY SON IS NINE YEARS OLD, AND IS NEEDING TO KNOW TEN INTERESTING FACTS ABOUT FRICTION FOR HIS ...
  A: 1) trains have steel wheels and run on steel track. but it is the weight and friction t hat allows ...
h2o?6/1/2008Sue Kayton
  Q: what does h2o stand for? i know its water but what is the break down thanks!
  A: H2O means there are two atoms of Hydrogen (H) and one atom of Oxygen (O). Here's a picture of a ...
magnets and capacitors5/28/2008Ralph Salier-Hellendag
  Q: why we can't use a magnet as a capacitor since that a magnet has south pole(negative) and north ...
  A: It depends on the type of circuit and the type of capacitor. There are many types of capacitors: ...
coke cans5/28/2008Ralph Salier-Hellendag
  Q: what is the metal used to make the coke can? Why is this metal used? why do some of the bubbles seem ...
  A: Most cans are now made of Aluminium. Some are made of steel. But those used by Coke-Cola are for ...
umbrella construction5/28/2008Dan Fink
  Q: I need to build an umbrella for my science project. I wanted to know what materials I would need to ...
  A: This is really a tough question! I could not find any resources online for building an umbrella. ...
egg drop project5/27/2008Sue Kayton
  Q: I am doing a science project with my little brother, He is in the 3rd grade. he making contraptions ...
  A: It has nothing to do with physics and everything to do with common sense. Common sense says if the ...
about coke cans5/26/2008Ralph Salier-Hellendag
  Q: murcia@yahoo.com.au thank you so much *kisses* love you , you saved my life 1. WHY DOES IT GET ...
  A: 1) what you have observed is called condensation. The cold can from the fridge draws moisture out ...
chemistry5/25/2008Ralph Salier-Hellendag
  Q: My 12yr old son wants to run a science experiment on testing the flammability of a variety of ...
  A: This is not as easy as it may seem. Many of the liquids you indicate are not easily flamable due to ...
Ventlation for Model House5/23/2008Ralph Salier-Hellendag
  Q: for a science project we need to build a model home that has to contain heat, and not let any heat ...
  A: The best material to use is some kind of foam board like foam core several layers thick or perhaps ...
Sound5/22/2008Ralph Salier-Hellendag
  Q: My son is doing a 4th grad science project and we are trying to figure out the best why to show what ...
  A: The best way to show what sound travels best through a solid, liquid or gas. I believe that a low ...
Egg Drop Competition5/21/2008Sue Kayton
  Q: I have a project called the 'Egg Drop/launch competition'. I have only a limited supply - I will ...
  A: Use your brain and experiment. Try stuff. If it doesn't work, try something else. That's called ...

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Questions by
Active Experts:
Ralph Salier-HellendagDan FinkSue Kayton
   

     
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