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What is the white powder in lightbulbs?

I noticed that the actual inside of the glass bulb is lined with a layer of white powder that wipes off real easily. what exactly is that stuff? and is it dangerous to get on your skin or inhale or something? some things say its just to even out the li...

8643 views

Why is the tundra ecosystem considered fragile and unstable?,

Why is the tundra considered a fragile and unstable biome

3739 views

What are the uses of sound energy? Help! This is for my report tom.

Pls. Answer.what are the uses of sound energy?.

3638 views

What do you call a person who studies birds?

What do you call aperson who studies birds is there even such thing as that like a birdyologist...I know its stupid but I cant stop thinking about it

2850 views

How and where can you get heavy water?

my chemistry teacher was telling me about how heavy water is made up..and I was wondering..how can you get heavy water? do you have to make it or can you purchase it?

2326 views

What is spring control and gravity control in indicating instruments?

please try to make your answers brief and detailed

2321 views

What does constant acceleration mean?

ok I just confused myself. does constant acceleration mean that it doesn change or that it changes constantly?

1826 views

Does changing rims on my car affect its performance?

Does changing out the stock rims on my car for bigger rims have an effect on anything? (suspension, gas mileage, etc.)

1691 views

how much does a 1/4 gram and a 1/2 gram weigh?

how much does a 1/4 gram and a 1/2 gram weigh?

1605 views

What does it mean if the sky is yellow?

What the hell does in mean if the sky is yellow??? Because I seen a tornado video and the sky was yellow.

1564 views

Campain slogan for a nucleus?

I am doing a project for biology and I need a campain slogan for the nucleus of a cell. Please help me!!!

1505 views

What is a good name for a calcium superhero?

I have this science project where I have to make and element a superhero and I have calcium but I dont knowwhat to name the hero ididnt really want to do calcium girl thanx:)

1482 views

Is there a difference between molecules, formula units, and atoms?

Is there a difference between molecules, formula units, and atoms?
Aren't they all particles? What is the difference? I don't get how you can tell.
How do you differentiate?

What are the 3 different types of molar mass?

All chemistry!

1463 views

Do sperm have brains?

When a male ejaculates into a female does his sperm know where to go by insticts or does the male have to like shoot it into the direction

1176 views NSFW

What is excretion and why is it important

What is excretion and why is it important in living organisms?

1140 views

Why does chemical weathering occur more quickly in a hot climate?

Why does chemical weathering occur more quickly in a hot climate? Can anoybody help me out here im trying to do my homework and I can find it anywhere!

1058 views

How long will a car run if sugar or sand is in the gas tank?

How long will a car run if someone put sugar, sand or anything like that in a gas tank?

1012 views

How to make an aluminum atom model?

How to make an aluminum atom model?

952 views

At sea level, a kilogram weighs approximately:

At sea level, a kilogram weighs approximately:

937 views

Why do attractive parents have ugly children?

Why is it that some ugly people have really attractive parents and some beautiful people's parents aren't very attractive? Where would the pretty people get the attractive physical features from if not their parents?

879 views

How are species related to the concept of biodiversity?

How are species related to the concept of biodiversity?

867 views

Does the sun move around the earth or the other way around?

Does the sun move around the earth or does the earth moves around the sun???

862 views

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