I am not a rocket scientist, I have never taken calculus, I do not have a degree of any sort, I have dropped out of high school, I can bearly spell words correctly, and I'm just a young punk kid. But I do have many questions that have been bothering me incessantly since I was 15 and took physics 20. These questions have lead me nowhere because University professors won't return my calls, my highschool teachers never seemed to give me a satisfying answer (they just tried to confuse me to avoid saying they didn't know), and the internet hasn't been much help in terms of articles or actually answering my questions. And now I am finally (after a few years) attempting to get real answers. The questions are as follows: 1. Is there a speed of gravity? This is one of the first questions I asked myself when thinking about gravity. My physics teachers all told me that it was, like everything else, limited to the speed of light. But that just does not sit right with me. Does that mean to say that if the sun just dissapeared the planets would continue their orbits for 8 seconds or whatever the time it is for the light to reach the earth? Would this not make space travel increadibly complicated in terms of mathmatics? Wouldn't the sun's gravity be affecting earth 8 minutes (I'm just assumeing the time) behind it's actual position? 2. If there is a speed of gravity (and possibly if there isn't one) could gravity be blocked/diverted/deflected? The only thing I could think of, with my non-existant education, to modify gravity would be magnetisim. With just fridge magnets to use I could see that gravity and magnetisim behaved in very similar if not identical ways. If magnets only acted on certain elements, then could gravity not just be a magnet for matter (assuming things exist that are not matter)? And would that mean that there is a measureable speed of magnetisim? 3. Does gravity need a medium to travel? Does gravity travel in waves like light? Or through the vibration of something like sound? And if gravity is instentanious and needs a medium, then couldn't we find and tap into that same medium for faster than light communication? 4.Could gravity be a push? This was just an idea I had, it pretty much came out of nowhere and I was just wondering if gravity was like water or air pressure, and was an unseen force pressing down on us. 5. Why does gravity weaken? Does that inherently mean that it has a speed and needs a medium to travel? Why would gravity wear off after a distance? 6. What is the nature of centrifugal/centripital force? I'm pretty sure centrifugal force is just there because spinning could be seen as moving in a direction for a fraction of time, then being diverted in another direction causeing you to be pushed against your car door or what have you. But would forces such as that be able to extend beyond the borders of whatever is making them move? 7. Would a perpetual-motion-gravity-electric-generator be possible? This is what I had envisioned but it's only in my head and ive never tried it: You have a large tank of water suspended in the air. Then you open one of two holes in the tank and it pours water into one of two buckets suspended by chain, connected to a pulley, so that it becomes heavier and sinks, spinning the pulley and raising the other bucket, the bucket then hits a bar off-center to drop the water into another basin connected to the top basin via pipes. The bottom basin would already be full of water and hold more volume than the top so that the bucket-water weight forces the water back up to the top (I hope). The pulley's spin will do all sorts of jobs (via gears); firstly it would generate electricity (I never learned how, spinning + something else, maybe magnets? makes electricity is all I know) as well as run a pump to push the bottom basin's water back to the top basin, and open the other hole to fill the other bucket. Repeat process. Or could you even "tap" into gravity? I have more questions and ideas but I can’t think of them just now, It’s very late and I haven’t slept for a while. I’m sorry if these questions are stupid and pointless, it’s only stuff I’ve thought of while trying to fall asleep. Like I said, I couldn’t stand highschool so I dropped out (2 years ago, I’m 19). Maybe I’ll get my G.E.D.... P.S. Even if my ideas are stupid, please tell me why they are.