shev

There's been an ongoing and frustrating debate with my roommate, one that hopefully you guys can resolve. He thinks a theory can evolve into a fact once it has enough evidence, and I think a theory will never become a fact because it explains the fact. Specifically, we were talking about gravity, he says it's a fact because we can see it, and I say there's a theory of gravity to explain that fact of gravity.

Well i grow my aquatic plants entirely under artificial light. The only thing that matters is the kelvin rating and amount of watts. Plants obviously reflect the green part of the spectrum and use the red and blue parts. but if you did happen to have enough light of any part of the spectrum photosynthesis can happen. you can kind of eye the kelvin rating, the redder, oranger or yellower the lower the rating. probably below 6000k will be noticiably different. the higher the kelvin rating the whiter or bluer it gets. Different parts of the spectrum affect plants differently. I dont know specifically about terrestrial plants, but aquatic plants the higher end of the spectrum has more to do with the rootoing and pigment production of the plants. while the lower end has to do with matruity and reproduction of the plants. as the water gets deeper light from the blue end of the spectrum is absorbed by the water since it has the shortest wavelength. so plants developed didfferent pigments to utilize different parts of the spectrum.

No, I meant not spinning. when you jump the world doesnt move beneath your feet because you are moving the same speed as the earth, it "throws" you right? well at the center and floating the earth was spinning you but since you arent touching anything, eventually would your velocity wear off, and the earth would be spinning but you would be staionary? ok, lets say the earth is spinning 10,000 miles per hour. (I have no idea what the real number is, maybe thats how fast you have to go to get off of earth?) and a space shuttle is coming in for landing. when it hits earth does it skid a lot since the earth is spinning so much? and lets say the space shuttle wasnt orbiting the planet. or lets say an astroid flies into our atmosphere, wouldnt the atmosphere be spinning with the earth? is that why there is so much air resistance against the asteroid that makes it disinigrate? that question made a lot more sense last night, lol.

Hello, im shevick, i know, a wierd name isnt it. but usually I use sad cow disease on other forums. I'm from montana

dang, this was asked before? I aksed a couple people at school, they said the air pressure would crush you when you got to the center so if I took a giant ladder to the center, I would float in the middle? or be pulled in every direction? there would still be gravitational attraction, or do they actually cancel eachother out? its not "free fall" though. ok, next question. if I were to just float at the center, eventually would my velocity would wear off? and I'd stop spinning with the earth? sorry if i'm making a mockery of this forum with silly questions.

....through the middle of the earth, and you jumped into it, what would happen? once you fall into the center of the earth there is equal mass, or almost equal mass maybe theres a mountain on a side, on each side of you. so i think they either cancel eachother out, our there is equal force to every part of your body. or maybe you'd fall out the other side. so what do you guys think would happen? or know what'd happen.

Thanks for the reply. the co2 dissolving in the water will make a weak carbonic acid, lowering my ph. so that means there are h+ ions right? so more h+ ions and carbon make it denser right? but not by a lot? im kind of relying on the fact the water that the co2 was dissolved in will sink. well thats the point of the diffuser, to get as much co2 dissolved into the water as possible by using more surface area on the bubble, and length of time in the water, and some added pressure. unfortunately I cant decrease the temperature to dissolve more into the water.

hello, I am building a co2 diffuser and was just wondering if co2 dissolved in water makes the water more dense, so it sinks, or less dense, so it floats? I was thinking more dense, sorry for the stupid question. thanks, and sorry if this isn't the right section.