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Mike Delie from Menomonie asks

I'm doing a senior project on recycling, and I'm curious if it uses more energy to mine and convert...

kristi from hurricane w.v asks

If a person or infant is going to get freckles, at what point or age do they appear?

Lori Lancaster asks

Why does a saturated solution of calcium acetate gel when either ethanol or isopropanol is added to...

Shauna from the Internet asks

How long can a vehicle typically run without oil or antifreeze before the engine seizes?

Marty Ellis from Pittsburgh asks

Can a sintered ore magnet be re-magnetized in a different configuration of its poles? Does it need...

Rick Morrison from Sudbury On asks

What makes certain surfaces such as highway lane markings, reflective strips on clothing and...

Peter Schmuecking from Roetgen nr Aachen/Germany asks

My son, 13 y, has found a really good idea to prove the four colour map problem without computers,...

umit koseoglu from the Internet asks

how would i go about making some dry ice at home or in the school lab?

Karla asks

What causes the bends?

Mike Starry from Fresno, CA asks

How and when will hydrogen fuel cells be used to provide electricity for my home? What would it...

Ian Gordon from Exeter UK asks

Why are sounds so much louder downwind, even when the wind is light?

Alain Goulnik asks

Can nuclear tests produce earthquakes? India started nuclear testing, then Pakistan followed in...

bree kissner from kingsville asks

why does soda pop fizz when it is poured over ice

Marcos Chimenti from Rio de Janeiro asks

Does air act as an insulator against lightning on flying airplanes? I know the aluminum case is...

Raymond J. Sucgang from Manila, Philippines asks

Hi, Could you please clarify: Does an increase in precision mean a decrease in accuracy? Does a...

Ken from Vancouver asks

If one could increase the flow of air into a jet engine,would this increase the efficiency of the...

Eduardo from Pembroke Pines asks

Is it true that gas particles at higher altitudes are farther away from each other than at lower...

Linda O\'Neill from Dartmouth asks

How can you define the pressure of 5 g. on a person? This would be done with the fingers. I am...

DeeCee from Indianapolis asks

How does vacuum insulation work and can an R Value be assigned to it? Does the depth of the vacuum...

Natasha Jackson from leaf river asks

How many skin cells would be in a square inch?

Kim Yonda from Winnipeg, Mb asks

I'm doing a project on mercury in water. I was wondering if and how you get mercury out of lakes. ...

Laura from Earlton asks

How come on a warm clear day clouds form at night?

Dennis Nolivos asks

What is your opinion on the ethics of transplant farming and what is your opinion about genetic...

Saw Mui asks

Why does the Periodic Table of the Elements have two separate tables - one above and one below?

Thalia Parcs from Toronto asks

I have noticed in Toronto for the past two years, that the weather has been abnormally cloudy in...

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...

Sara asks

Is invisiblilty possible? Is it possible to alter an object so it can't be seen? Could people's...

Kim from the Internet asks

When metal scrapes metal such as two spoons, it makes the edges of my teeth feel numb. Why is that?

Tony Sousa asks

How do hot packs work? My wife purchased a reusable hot pack for keeping our baby warm when we go...

Hannah from North Bay, Ontario asks

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

Phil from Ottawa asks

Are there some materials that shrink faster that other materials in cold? If yes, which ones?

Helina from Shakespeare asks

What two liquids combine that gives you a solid instantly?

D. Tolenaar asks

How does air conditioning work?

darioush asks

What is thought? Is it matter or energy? And how does the brain create a thought?

Yogesh Patil asks

Can you provide a detailed structure and working of the magnetron tube used in microwave ovens?

Nikki May from Erie asks

How does heated vinegar react with powdered milk to create the result of plastic like curds?

Amanda from Thunder Bay, Ontario asks

What is colour? How does the brain perceive colour?

Brian from Jersey City asks

How are mountains created?

Lia Cassanego asks

I am experimenting with microwave reboil caused when you microwave coffee or water and add sugar,...

Jesse Fitzpatrick asks

What is the highest and lowest canadian recorded air temperature?