Recent content by Coda

Hey, thanks for your reply. It really helps a lot :)

Which size of the molecule is bigger? Water or oxygen? Can someone state out the size unit of these molecules And, can I find a meterial to separate this 2 matter but let one of it pass through the other? (Osmosis effect) Really appreaciate who can help out here, thx

Thx for the information you provide, I have been learning alot. Anyway graal, does the rockets have to be touch-down to the planet to confirm the exactly gravity amount?

Scientist says that gravity on Mars is around 38% compare to Earth. Is they proof this merely by caculation? I not sure whether scientist really land any space mechanic/machine on Mars, if yes, can someone provide me the information? Your help is much appreaciate, thanks :)

Hello D H, can you explain to me how moon "gravitationally bound to Earth"? My physics is not so good, as I know moon can orbit Earth because it's accelerate speed is at the correct distant from the earth. And I guess, the mass attration from the moon have some effect too. Is this what you...

I see. But then why moon didnt orbit the sun but Earth itself?

Hallo, i have a question here, hope someone can answer it. :) As we know, two object attract each other. The closer the object, the stronger the force of attraction. This explain why Earth is attract by sun, but moon is attract by earth. (i guess.) But here i got a question, we know that...