David from the Internet asks

Where did the constant pi (3.14159...) come from? Who discovered it and when?

Linda Horsman from Gibsons, BC asks

What is the cause of static electricity? Also, I'm doing research for a book and I wanted to know...

Ian Rosner asks

Can you explain the fourth dimension and state simply Einstein's Theory of Relativity?

Mohammad from Toronto asks

What is 2 with the power of 4? and can u tell me some consideration of microwaves?

Selena Henderson from Houston asks

Why don't hurricanes hit the country of Panama? Is there any data predicting the probability of...

Jenn from Torrance asks

What is the composition of an American nickel? Also, do you think that a nickel has a higher...

Beth Conrad from Hong Kong asks

How can I build a water purifier?

Anonymous asks

How can I create a real light saber? It does not have to be completely like the ones in the movie...

Yuriy Yashkir asks

What does the future of Psychology hold? New therapies for brain disorders? Computer...

Ken Cooke asks

I read somewhere there are a total of 9 dimensions. Can you elaborate on what these dimensions are?...

Jackie B. from Wisconsin asks

Which metal conducts heat the fastest?

Jeremy from Norwood asks

What component controls how data is written on a hard drive?

Kashif from Toronto asks

Why is propylene glycol not an alcohol? Same for glycerol. Why don't they evaporate and smell like...

Jefrey from KL asks

What is the purpose of polyvinylpyrrolidone in the making of hard capsule gelatin. What is the...

Sheila Hart asks

How can you detect a chemical in the human body even after it has passed through? For example,...

Katie Harvill from Tuscaloosa asks

1)How does prenatal exposure to sex hormones influence behavior later in life? 2)What are gender...

Emma from the Internet asks

Why has Aluminium only recently been extracted from its ore?

Johnny from Mississauga asks

In math class, my teacher has been frequently making references to what I've mentally labelled, as...

christina from the Internet asks

Why are portable phones called cellular phones? How do they work?

Stef asks

How are minerals used in the production of Canadian coins?

Christobell Bison from Sudbury asks

Can Ozone be created? And if so, is it possible to patch up the Earth's protective layer of Ozone...

Ryan from Toronto asks

I am in grade 7 and attempting to do a Science Fair Project. I would like to know how I could test...

Zach asks

How were the organelles in the cell named?

nohjin asks

Where does the energy in freezing water come from? When water freezes, its volume increases so that...

Gordon from Oakville, Ontario asks

I was studying for a science exam and stumbled across a chapter that covered energy. The chapter...

Natasha Jackson from leaf river asks

How many skin cells would be in a square inch?

Leo from Montville, NJ asks

Where can I find the data to support that polyvinylpyrrolidone is safe for medical applications? ...

david caron from Toronto asks

What is the energy required to split H2O, (joules), and the energy released from combusting H2 +...

Charl Mai from Vancouver, Canada asks

Do herbal medicines interfere with the effectiveness of prescription medicines? If so, how does...

kirst from the Internet asks

What everyday appliance uses electrostatics?

Eli Sklar asks

What education do you need to become an embryologist?

Lori Anne Stanger from New Liskeard, Ontario asks

As everyone had heard in the news, as a result of the Indian Ocean earthquake and Tsunami of Dec...

Hannah from North Bay, Ontario asks

My Dad told me about bioluminescence you know, the stuff that makes living organisms glow? Anyway,...

Kevin Swope from San Diego/California asks

Why does Aspartame taste so sweet? What is the chemistry involved in something that tastes sweet?

Tony from Melbourne asks

In my recent science project, I tried discharging batterys in the freezer, fridge and room. The...

Corinna asks

Can stabilized oxygen be used in place of iodine or chlorine to purify water? What if used in...

Rena from Thornhill asks

For school I need to know about natural convection and forced convection. I need to know the...

Julie asks

What is the chemical make-up of pear, banana and apple peels?

Antony St-Jacques from Kingston asks

How can I separate NaCl so I can obtain Na?

Shaheena Perveen from Karachi, Pakistan asks

Why do we get coloured water if we put a slice of beet root in water but we do not get coloured...