| Subject | Date Asked | Expert |
|
| hamster wheel | 1/22/2006 | Dan Fink |
Q: I want to attatch a roller bearing to my hamster wheel to make it run quieter and smoother. I saw ...
A: It's a difficult question to answer, because hamster wheels vary in design so much. The bearings are ...
|
| Telephone | 1/18/2006 | Dan Fink |
Q: can u hear your voice and another person's voice by a metal, wood, steel, tread?
A: Sound waves are a mechanical wave, caused by a vibration. The vibration starts molecules moving back ...
|
| science | 1/18/2006 | Ralph Salier-Hellendag |
Q: Why the morning sun look red
A: The same reason that the afternoon sun looks orange or red. As the sun sets, the light from the sun ...
|
| web sites for Kids | 1/16/2006 | Dan Fink |
Q: how are you what's Bettar web sites for Kids (5-8)age? please send your addrees
A: My 2 favorite science websites for kids are: The Science Hobbyist http://amasci.com/ Lots of ...
|
| Why doesn't rain hurt your head? | 1/12/2006 | Dan Fink |
Q: Since rain is falling from so far up in the sky, why doesn't it hurt your head? If I can hurt ...
A: It looks like you already understand gravity -- which accelerates objects at 9.8 meters per second, ...
|
| Museums | 1/11/2006 | Ralph Salier-Hellendag |
Q: Do you know what is the largest museum of science in the United States? Thank you, Jamie
A: I don't know for sure but I believe that it would be the Smithsonian Institution in Washington DC. ...
|
| science fair project | 1/9/2006 | Ralph Salier-Hellendag |
Q: My son is a 5th grader. He wants to see which public bathroom (Wal-Mart, McDonald's, gas station) ...
A: This may be quite a challange for your son. But it can be done. The two of you will need to get ...
|
| SCIENCE PROJECT INVESTIGATION | 1/9/2006 | Ralph Salier-Hellendag |
Q: WhaT IS A SCIENCE PROJECT INVESTIGATION? MY SON IS IN THIRD GARDE AND HE HAS TO DO A SCIENCE PROJECT ...
A: Your son is responsible for doing a science fair project. Such projects are a way to teach children ...
|
| K and 1st grade science fair: help! | 1/7/2006 | Ralph Salier-Hellendag |
Q: I am a non-science mom and have 2 boys very into the upcoming science fair. So, i have 2 questions: ...
A: 1) this is a very good sci fair idea for a 5 year old. Why does Ice Cream Melt. Ice Cream stays ...
|
| k and 1st science fair questions | 1/7/2006 | Dan Fink |
Q: I am a non-science mom and have 2 boys very into the upcoming science fair. My kindergartener wants ...
A: Should be a good science project! Every chemical element has a melting point--for water, it's 32 ...
|
| science project | 1/4/2006 | Dan Fink |
Q: I'm 11 and I'm doing a project for school and we all have to shoot a ping pong ball as far as we can ...
A: Your experiment with adjusting the angle is right on track -- the distance you get will depend on ...
|
| Energy | 1/2/2006 | Dan Fink |
Q: "How does an oven maintain its heat/energy?"
A: After an oven gets up to temperature with it's heating element, the insulation in the oven walls ...
|
| earth's magnetic field | 12/28/2005 | Dan Fink |
Q: Does the earth's magnetic field spin along with the rotation of the earth or is it a stationary ...
A: Good question. A fairly easy answer that turns out to be quite complicated in the end, though! The ...
|
| Science and Math Terms | 12/28/2005 | Ralph Salier-Hellendag |
Q: Fifth grader has an assignment to find a math or sceince term for every letter of the alphabet. We ...
A: The first answer is rather sophisticated, the second may be better suited. #1 J Chain: A ...
|
| Hamster Power? | 12/13/2005 | Dan Fink |
Q: About how much energy can a hamster on a wheel generate?
A: I was able to get Skippy the hamster to produce peaks of about 150 milliamps of current at 3 volts, ...
|
| brainstorm | 12/13/2005 | Dan Fink |
Q: If you were on a elevator, and the elevator is falling from 10th floor just before it hit the ...
A: Unfortunately, jumping wouldn't help you much. The falling elevator is accelerating by the force of ...
|
| Weight and Sinking | 12/6/2005 | Ralph Salier-Hellendag |
Q: Why do some objects sink faster in water than other objects?
A: It depends on the density of the object. For instance, not all objects sink, many float and that is ...
|
| Science discoveries | 12/5/2005 | Ralph Salier-Hellendag |
Q: Do you know of any recent science discoveries made by students (high school or younger)? Are there ...
A: It does not happen very often any more. But the most common are fossil discoveries made by young ...
|
| Avian Flu | 12/3/2005 | Ralph Salier-Hellendag |
Q: How exactly is avian flu transmitted from birds to humans?
A: Avian flu is transmited to humans by infected blood, fecal matter or other fluids from an infected ...
|
| EggDrop Survival Experiment | 12/3/2005 | Dan Fink |
Q: My teacher organized a experiment called the EGGDROP is worth about 20% of my grade and I want a ...
A: Hopefully this gets through --- allexperts sets the email subject, not me. The tricks for the egg ...
|
| The moon | 12/1/2005 | Dan Fink |
Q: Do we always ssee the same side of the moon?
A: Yes. Over millions of years, the Earth' gravity slowed down the moon's rotation, and the Earth and ...
|
| Dams | 11/29/2005 | Dan Fink |
Q: 1. How many dams are there in Connecticut? 2. How many dams in Connecticut create energy? 3. How ...
A: I can't answer questions like this, it's not fair to you or your teacher. Assignments like this are ...
|
| Force | 11/24/2005 | Ralph Salier-Hellendag |
Q: Which of the ff.statements regarding the force of gravity is incorrect? * The force of gravity is a ...
A: julvin, a) this is a correct statement. Gravity is what holds or pulls objects towards the center ...
|
| Friction | 11/24/2005 | Ralph Salier-Hellendag |
Q: In which of the following situations can friction be a problem? * between the tyres of a car and ...
A: The tyres on a car would not move the car with out friction. On a wet road however, if there is ...
|
| rose flower | 11/18/2005 | Dan |
Q: i am 9 years old. I am intersted in Science.pl.tell me why roses have thorns? Thank you!
A: Good question. The simple answer is for their protection. Why do cats have claws? Protection. The ...
|
| wind/energy | 11/4/2005 | Dan |
Q: My parents could not find the answer, neither could I! Even on the internet and the library. I was ...
A: It is easier if someone explains this to you in person. You may want to ask your teacher this. ...
|
| Insects | 11/3/2005 | Dan |
Q: Where would you suggest locating information for a 2nd grader who has a science project involving ...
A: When I recommend a website for a 2nd grader, it's hard. I recommend no 2nd grader to use the ...
|
| Ingredients in Nail Polish | 10/31/2005 | Ralph Salier-Hellendag |
Q: I've looked everywhere to try to find out what ingredients are in nail polish. For a school project ...
A: It has several ingrediants. 1st: a solvant, usually acetone, the same stuff in nail polish ...
|
| Chemistry | 10/30/2005 | Ralph Salier-Hellendag |
Q: Why is relative atomic mass never a whole number
A: Nathan, A very good question. How much does an atom weigh? These are such small units of matter ...
|
| thickness of blood | 10/23/2005 | Ralph Salier-Hellendag |
Q: How could I determine if blood is thicker (denser) than water?
A: Water is a complex mixture of cells, fluids and other materials. By virtue of all of this stuff, it ...
|
| lactate in my blood | 10/23/2005 | Ralph Salier-Hellendag |
Q: If I run without breathing, why would lactate accumulate in my blood?
A: Lactase is a by product of the metabolism of sugars and protiens which are use during vigorous ...
|
| thickness of blood | 10/23/2005 | Ralph Salier-Hellendag |
Q: How could I determine if blood is thicker (denser) than water?
A: Blood is a very complex mixture of cells, liquids and other materials. It is heavier then water by ...
|
| biology | 10/15/2005 | Ralph Salier-Hellendag |
Q: which was easy to read.My students have a follow-up question. They want to know if life ie bacteria ...
A: In the case of evaporative moisture the answer is no. The water molecules which traspire into the ...
|
| fuel efficiency | 10/15/2005 | Dan Fink |
Q: These new hydrogen cell and hybrid cars are more efficient, but are they worth it. Does the energy ...
A: You already hit the answer right on the head. The problem with the 'hydrogen economy', as many ...
|
| biology | 10/12/2005 | Ralph Salier-Hellendag |
Q: My grade 5 students what to ask an expert about whether or not water vapour can support life and if ...
A: Yes water vapor in the form of fog and humidity can support life in a limited way. On the south ...
|
| science fair/5th grade | 10/6/2005 | Dan Fink |
Q: Do you know anything about an egg drop science experiment?
A: Egg drops are fun experiments. They key in designing your container is to spread the forces out over ...
|
| lab safety | 9/24/2005 | Ralph Salier-Hellendag |
Q: I have 2 lab safety questions that am not sure of. 1. What is the first thing to do when you ...
A: 1) It depends on where the gas leak is occuring. But the safe thing to do is evacuate the lab and ...
|
| Independent variable | 9/8/2005 | Ralph Salier-Hellendag |
Q: I'm having slight trouble with identifying dependent variable and independent variable. Thereof, i ...
A: I will describe an experiment to you and then define these variables. I take 20 seeds of corn. I ...
|
| Glass residue | 8/31/2005 | Dan |
Q: I am Jon I am 11 I have a question. Dose glass leave a residue on your hands when you toutch it like ...
A: I am going to have you ask in the chemistry area on this site. You see glass is a type of liquid. ...
|
| Arabic rescources in science | 8/31/2005 | Ralph Salier-Hellendag |
Q: It will be avery a kind of you if you could provide me with Arabic rescources & sites related to ...
A: Ibrahim, Thank you for asking this question. If you are located in the US, this may be very ...
|
